Sample records for unusual ct findings

  1. 18FDG PET/CT findings in the unusual urachal adenocarcinoma.

    PubMed

    Guimarăes, Marcos Duarte; Bitencourt, Almir Galvăo Vieira; Lima, Eduardo Nóbrega Pereira; Marchiori, Edson

    2014-09-01

    A 48-year-old woman presented with a hard, painless mass in the left lower quadrant and no other significant complaint. Laboratory tests, including those for tumor markers, showed no significant abnormal value. CT showed an extraperitoneal mixed solid and cystic mass in the anterior abdominal wall, located anterocranial to and in close contact with the bladder. Percutaneous biopsy findings were compatible with adenocarcinoma of unknown origin. PET/CT showed increased 18FDG uptake on the mass and no evidence of disease at other sites. The patient underwent tumor resection, and the pathological diagnosis was moderately differentiated urachal adenocarcinoma. PMID:24566402

  2. Thoracic textilomas: CT findings*

    PubMed Central

    Machado, Dianne Melo; Zanetti, Gláucia; Araujo, Cesar Augusto; Nobre, Luiz Felipe; Meirelles, Gustavo de Souza Portes; Pereira e Silva, Jorge Luiz; Guimarăes, Marcos Duarte; Escuissato, Dante Luiz; Souza, Arthur Soares; Hochhegger, Bruno; Marchiori, Edson

    2014-01-01

    OBJECTIVE: The aim of this study was to analyze chest CT scans of patients with thoracic textiloma. METHODS: This was a retrospective study of 16 patients (11 men and 5 women) with surgically confirmed thoracic textiloma. The chest CT scans of those patients were evaluated by two independent observers, and discordant results were resolved by consensus. RESULTS: The majority (62.5%) of the textilomas were caused by previous heart surgery. The most common symptoms were chest pain (in 68.75%) and cough (in 56.25%). In all cases, the main tomographic finding was a mass with regular contours and borders that were well-defined or partially defined. Half of the textilomas occurred in the right hemithorax and half occurred in the left. The majority (56.25%) were located in the lower third of the lung. The diameter of the mass was ? 10 cm in 10 cases (62.5%) and > 10 cm in the remaining 6 cases (37.5%). Most (81.25%) of the textilomas were heterogeneous in density, with signs of calcification, gas, radiopaque marker, or sponge-like material. Peripheral expansion of the mass was observed in 12 (92.3%) of the 13 patients in whom a contrast agent was used. Intraoperatively, pleural involvement was observed in 14 cases (87.5%) and pericardial involvement was observed in 2 (12.5%). CONCLUSIONS: It is important to recognize the main tomographic aspects of thoracic textilomas in order to include this possibility in the differential diagnosis of chest pain and cough in patients with a history of heart or thoracic surgery, thus promoting the early identification and treatment of this postoperative complication. PMID:25410842

  3. Intracerebral pneumatoceles following facial trauma: CT findings

    SciTech Connect

    Mendelsohn, D.B.; Hertzanu, Y.

    1985-01-01

    Three patients with delayed frontal intracerebral pneumatoceles following facial injury are presented. In one patient an unusual appearance of bilateral and symmetrical frontal lobe pneumatoceles was demonstrated. While diagnosis is not difficult on routine radiographs, CT is valuable for determining effects on the brain and clearly delineating the fracture site; CT shows the location of the pneumatocele and may show an associated air-fluid level, mass effect or surrounding edema, or rim enhancement following administration of contrast material. The radiological appearances in conjunction with the clinical findings are highly characteristic and should not be mistaken for gas-forming cerebral abscesses.

  4. Atypical CT Findings in Plexiform Ameloblastoma

    PubMed Central

    Binjoo, Nagesh; Modgil, Richa; Negi, Lalit Singh; Kaur, Prabhpreet

    2014-01-01

    Ameloblastoma is an uncommon epithelial odontogenic neoplasm that is nonmineralized, locally aggressive, and, in most cases, benign. Most ameloblastomas develop in the molar-ramus region of the mandible with 70% of them arising in the molar-ramus area. Radiologically they are unilocular or multilocular radiolucency with a honeycomb or soap bubble appearance. The radiographic appearance of ameloblastoma can vary according to the type of tumor. CT is usually helpful in determining the contours of the lesion, its contents, and its extension into soft and hard tissues. Through this case we would bring to light some of the unusual CT findings which include the destruction of the surrounding structures by the lesion which appeared to be normal routine lesion when viewed clinically. PMID:25506456

  5. Adrenal cortex dysfunction: CT findings

    SciTech Connect

    Huebener, K.H.; Treugut, H.

    1984-01-01

    The computed tomographic appearance of the adrenal gland was studied in 302 patients with possible endocrinologic disease and 107 patients undergoing CT for nonendocrinologic reasons. Measurements of adrenal size were also made in 100 adults with no known adrenal pathology. CT proved to be a sensitive diagnostic tool in combination with clinical studies. When blood hormone levels are increased, CT can differentiate among homogeneous organic hyperplasia, nodular hyperplasia, benign adenoma, and malignant cortical adenoma. When blood hormone levels are decreased, CT can demonstrate hypoplasia or metastatic tumorous destruction. Calcifications can be demonstrated earlier than on plain radiographs. When hormone elimination is increased, the morphologic substrate can be identified; tumorous changes can be localized and infiltration of surrounding organs recognized.

  6. Specific CT findings in Krabbe disease

    Microsoft Academic Search

    E. Kwan; J. Drace; D. Enzmann

    1984-01-01

    Specific computed tomography (CT) findings in four patients with biochemically proven Krabbe disease included symmetric increased attenuation in the cerebellum, brainstem, thalami, caudate nuclei, and corona radiata before and in conjunction with decreased attenuation of white matter followed by atrophy at a later stage. Familiarity with the CT findings in the acute phase of Drabbe disease may assist clinicians in

  7. Cytomegalovirus pneumonia in transplant patients: CT findings

    SciTech Connect

    Eun-Young Kang; Patz, E.F. Jr.; Mueller, N.L. [Duke Univ. Medical Center, Durham, NC (United States)

    1996-03-01

    Our goal was to assess the CT findings of cytomegalovirus (CMV) pneumonia in transplant patients. The study included 10 transplant patients who had chest CT scan and pathologically proven isolated pulmonary CMV infection. Five patients had bone marrow transplant and five had solid organ transplant. The CT scans were retrospectively reviewed for pattern and distribution of disease and the CT findings compared with the findings on open lung biopsy (n = 9) and autopsy (n = 1). Nine of 10 patients had parenchymal abnormalities apparent at CT and I had normal CT scans. The findings in the nine patients included small nodules (n = 6), consolidation (n = 4), ground-glass attenuation (n = 4), and irregular lines (n = 1). The nodules had a bilateral and symmetric distribution and involved all lung zones. The consolidation was most marked in the lower lung zones. The CT findings of CMV pneumonia in transplant patients are heterogeneous. The most common patterns include small nodules and areas of consolidation. 13 refs., 4 figs., 1 tab.

  8. Specific CT findings in Krabbe disease

    SciTech Connect

    Kwan, E.; Drace, J.; Enzmann, D.

    1984-09-01

    Specific computed tomography (CT) findings in four patients with biochemically proven Krabbe disease included symmetric increased attenuation in the cerebellum, brainstem, thalami, caudate nuclei, and corona radiata before and in conjunction with decreased attenuation of white matter followed by atrophy at a later stage. Familiarity with the CT findings in the acute phase of Drabbe disease may assist clinicians in limiting the differential diagnosis and requesting appropriate laboratory tests.

  9. Ct findings of malignant fibrous histiocytoma

    Microsoft Academic Search

    Jingrui Dai; Mulan Shi; Genzhu Li; Ning Lu

    1996-01-01

    Purpose: To define the sites and CT findings of 45 MFH patients. Materials and Methods: The primary sites were: cranio-facial\\u000a 16, trunk and extremity 12 and abdominal 17 (13 retroperitoneal). As seen on CT scans, the lesion is clear-margined and even\\u000a when small, but, when large (42\\/50, >5 cm), it is uneven in consistency and apt to invade the nearby

  10. Lumbar spine: pretest predictability of CT findings

    SciTech Connect

    Giles, D.J.; Thomas, R.J.; Osborn, A.G.; Clayton, P.D.; Miller, M.H.; Bahr, A.L.; Frederick, P.R.; O'Connor, G.D.; Ostler, D.

    1984-03-01

    Demographic and symptomatic data gathered from 460 patients referred for lumbosacral CT examinations were analyzed to determine if the prescan probability of normal or abnormal findings could be predicted accurately. The authors were unable to predict the presence of herniated disk on the basis of patient-supplied data alone. Age was the single most significant predictor of an abnormality and was sharply related to degenerative disease and spinal stenosis.

  11. A case of secondary erythromelalgia with unusual histological findings.

    PubMed

    Bakkour, Waseem; Motta, Luisa; Stewart, Elizabeth

    2013-06-01

    Erythromelalgia clinically presents with episodic burning, erythema, and warmth of acral sites. It can be divided into primary and secondary associated with myeloproliferative and autoimmune conditions. Histology commonly shows capillary proliferation, swelling of endothelial cells, perivascular edema, and chronic inflammation with sparse lymphocytic infiltrate. We report a case of a 55-year-old man with classical secondary erythromelalgia clinically; however, he had unusual histological findings on biopsy comprising of acute perivascular infiltrate and perivascular mucin. This is the first report of such findings in the context of secondary erythromelalgia. PMID:23334520

  12. Unusual thoracic radiographic findings in children treated for Hodgkin's disease

    SciTech Connect

    Jochelson, M.S.; Tarbell, N.J.; Weinstein, H.J.

    1986-06-01

    Mantle irradiation is often part of the treatment for Hodgkin's disease. Localized pneumonitis and fibrosis are well-known sequelae of this treatment. We report nine patients with unusual thoracic radiographic findings following treatment for Hodgkin's disease. All nine had mediastinal widening. Seven of these patients received combined modality therapy in which prednisone was given with their MOPP. In these seven patients, an increase in mediastinal width developed at the same time as the radiographic changes of radiation pneumonitis. Two patients developed bilateral infiltrates extending beyond the field of radiation to the lung periphery. In one of these patients, a spontaneous pneumomediastinum developed. One patient underwent mediastinal biopsy that revealed inflammatory changes similar to those seen in radiation pneumonitis. All patients either responded to steroids or had spontaneous regression of radiographic abnormalities supporting the presumed diagnosis of treatment related changes. Recognition of these unusual sequelae of mantle irradiation will aid in differentiating them from infection or tumor and lead to prompt, appropriate treatment.

  13. Cerebritis due to Listeria monocytogeneses: CT and MR findings

    Microsoft Academic Search

    Y. Aladro; P. Ponce; V. Santullano; A. Angel-Moreno; M. Angel Santana

    1996-01-01

    Infections by Listeria monocytogenes are uncommon, with cerebritis being even rarer. We present three cases of cerebritis which occurred during an outbreak of listeriosis. The CT and MR findings at diagnosis and during follow-up are described. Predominant deep white matter lesions with nodular and ring enhancement were seen. The MR yielded a higher resolution of the lesions than CT.

  14. “Eczema Coxsackium” and Unusual Cutaneous Findings in an Enterovirus Outbreak

    PubMed Central

    Oza, Vikash; Frieden, Ilona J.; Cordoro, Kelly M.; Yagi, Shigeo; Howard, Renee; Kristal, Leonard; Ginocchio, Christine C.; Schaffer, Julie; Maguiness, Sheilagh; Bayliss, Susan; Lara-Corrales, Irene; Garcia-Romero, Maria Teresa; Kelly, Dan; Salas, Maria; Oberste, M. Steven; Nix, W. Allan; Glaser, Carol; Antaya, Richard

    2013-01-01

    OBJECTIVE: To characterize the atypical cutaneous presentations in the coxsackievirus A6 (CVA6)–associated North American enterovirus outbreak of 2011–2012. METHODS: We performed a retrospective case series of pediatric patients who presented with atypical cases of hand, foot, and mouth disease (HFMD) from July 2011 to June 2012 at 7 academic pediatric dermatology centers. Patients were included if they tested positive for CVA6 or if they met clinical criteria for atypical HFMD (an enanthem or exanthem characteristic of HFMD with unusual morphology or extent of cutaneous findings). We collected demographic, epidemiologic, and clinical data including history of skin conditions, morphology and extent of exanthem, systemic symptoms, and diagnostic test results. RESULTS: Eighty patients were included in this study (median age 1.5 years, range 4 months–16 years). Seventeen patients were CVA6-positive, and 63 met clinical inclusion criteria. Ninety-nine percent of patients exhibited a vesiculobullous and erosive eruption; 61% of patients had rash involving >10% body surface area. The exanthem had a perioral, extremity, and truncal distribution in addition to involving classic HFMD areas such as palms, soles, and buttocks. In 55% of patients, the eruption was accentuated in areas of eczematous dermatitis, termed “eczema coxsackium.” Other morphologies included Gianotti-Crosti–like (37%), petechial/purpuric (17%) eruptions, and delayed onychomadesis and palm and sole desquamation. There were no patients with serious systemic complications. CONCLUSIONS: The CVA6-associated enterovirus outbreak was responsible for an exanthem potentially more widespread, severe, and varied than classic HFMD that could be confused with bullous impetigo, eczema herpeticum, vasculitis, and primary immunobullous disease. PMID:23776120

  15. Thin-section CT findings in Pseudomonas aeruginosa pulmonary infection

    PubMed Central

    Okada, F; Ono, A; Ando, Y; Nakayama, T; Ishii, R; Sato, H; Kira, A; Tokimatsu, I; Kadota, J; Mori, H

    2012-01-01

    Objective The aim of this study was to assess clinical and pulmonary thin-section CT findings in patients with acute Pseudomonas aeruginosa (PA) pulmonary infection. Methods We retrospectively identified 44 patients with acute PA pneumonia who had undergone chest thin-section CT examinations between January 2004 and December 2010. We excluded nine patients with concurrent infections. The final study group comprised 35 patients (21 males, 14 females; age range 30–89 years, mean age 66.9 years) with PA pneumonia. The patients' clinical findings were assessed. Parenchymal abnormalities, enlarged lymph nodes and pleural effusion were evaluated on thin-section CT. Results Underlying diseases included malignancy (n=13), a smoking habit (n=11) and cardiac disease (n=8). CT scans of all patients revealed abnormal findings, including ground-glass opacity (n=34), bronchial wall thickening (n=31), consolidation (n=23) and cavities (n=5). Pleural effusion was found in 15 patients. Conclusion PA pulmonary infection was observed in patients with underlying diseases such as malignancy or a smoking habit. The CT findings in patients with PA consisted mainly of ground-glass attenuation and bronchial wall thickening. Advances in knowledge The CT findings consisted mainly of ground-glass attenuation, bronchial wall thickening and cavities. These findings in patients with an underlying disease such as malignancy or a smoking habit may be suggestive of pneumonia caused by PA infection. PMID:22844034

  16. CT findings in ulcerative, granulomatous, and indeterminate colitis

    SciTech Connect

    Gore, R.M.; Marn, C.S.; Kirby, D.F.; Vogelzang, R.L.; Neiman, H.L.

    1984-08-01

    Eight patients with ulcerative colitis, three with colitis indeterminate, and 15 patients with Crohn disease were studied by computed tomography (CT) to establish CT criteria for each disorder in hopes of providing a new diagnostic perspective useful in the radiographic evaluation of inflammatory colitis. The CT findings in ulcerative colitis included thickening of the colon wall, which was characterized by inhomogeneous attenuation and a target appearance of the rectum, and proliferation of perirectal fat. Bowel wall thickening with homogeneous attenuation, fistula and abscess formation, and mesenteric abnormalities were observed in patients with Crohn colitis. Patients with colitis indeterminate showed colonic changes on CT observed in both disorders. Initial experience suggests that CT can differentiate patients with well established ulcerative and Crohn colitis.

  17. Cylindrical Bronchiectasis: Diagnostic Findings on Thin-Section CT

    Microsoft Academic Search

    Joung Sook Kim; Nestor L. Muller; Chan Sup Park; Philippe Grenier; Christian J. Herold

    OBJECTIVE. The aini ofthis study was to determine the frequency ofdiagnostic findings of bronchiectasis on thin-section CT and the usefulness of those findings in distinguishing patients with cylindrical bronchiectasis from healthy subjects. MATERIALS AND METHODS. The study was retrospective and included 26 healthy adults. 10 consecutive patients with surgically proven cylindrical bronchiectasis. and 49 patients who had been prospectively diagnosed

  18. Postoperative anatomic and pathologic findings at CT following gastrectomy.

    PubMed

    Kim, Kyoung Won; Choi, Byung Ihn; Han, Joon Koo; Kim, Tae Kyoung; Kim, Ah Young; Lee, Hyun Ju; Kim, Young Hoon; Choi, Joon-Il; Do, Kyung-Hyun; Kim, Hyo Cheol; Lee, Min Woo

    2002-01-01

    Helical computed tomography (CT) is useful in identifying postoperative anatomic changes, complications, and tumor recurrence in gastric cancer patients who have undergone gastrectomy. Postoperative anatomic changes can usually be identified on consecutive CT scans. Complications include anastomotic leakage, duodenal stump leakage, intraabdominal bleeding, wound complications, and other less common complications (postoperative pancreatitis, retention of surgical foreign bodies, diffuse peritonitis). The degree and extent of bowel wall thickening is important in diagnosing tumor recurrence; however, CT lacks specificity. Large or conglomerated lymph node metastases can be easily diagnosed at CT; however, small solitary or focal metastases may not be detected or differentiated from nonmetastatic nodes. Ascites, a common finding with peritoneal seeding in gastrointestinal tumors, is well depicted at CT. Hematogenous metastases from gastric carcinoma are most frequently seen in the liver and are best demonstrated with helical CT performed during the portal venous phase of enhancement (sensitivity >90% for the detection of lesions >1 cm). The sophisticated surgical procedures used in gastrectomy can alter normal anatomy and make image interpretation difficult; thus, familiarity with the appearance of postoperative anatomic changes, complications, and tumor recurrence is essential for accurate CT evaluation of affected patients. PMID:11896222

  19. Pancreatic Tumors: Emphasis on CT Findings and Pathologic Classification

    PubMed Central

    Cho, Hee-Woo; Kim, Myeong-Jin; Park, Mi-Suk; Lim, Joon Seok; Chung, Yong Eun; Kim, Ki Whang

    2011-01-01

    Pancreatic tumors can be classified by their morphologic features on CT. The subtypes include solid tumors, mixed cystic and solid lesions, unilocular cysts, multilocular cystic lesions, and microcystic lesions. Endoscopic US and MRI can provide detailed information for classifying pancreatic lesions. Each subtype has different kinds of tumors and malignant potential, thus the classification can be useful for a better differential diagnosis and treatment planning. For this purpose, we suggest an appropriate modified classification system by using the imaging features of pancreatic tumors with an emphasis on CT findings and illustrate various findings of typical and atypical manifestations. PMID:22043156

  20. Unusual findings in Creutzfeldt-Jakob disease. Case report.

    PubMed

    Signorino, M; Giovagnoli, A R; Sirocchi, G; Censori, B

    1988-06-01

    We present a definite case of Creutzfeldt-Jakob disease (CJD) with visual evoked response (VER) and CSF oligoclonal band abnormalities and discuss the neurobiological significance and diagnostic value of these findings. PMID:3136093

  1. Unusual Lymph Node Metastases of Prostate Cancer Detected by 18F-Fluorocholine PET/CT.

    PubMed

    Pinaquy, Jb; Allard, Jb; Cornelis, F; Pasticier, G; De Clermont, H

    2015-04-01

    A 65-year-old patient with prostate adenocarcinoma was explored by F-fluorocholine (FCH) PET/CT for pretreatment staging because of a high risk of prostate cancer. Images showed multiple foci with increased uptake of F-FCH within some pelvic and retroperitoneal lymph nodes, osseous foci (iliac bones and sacrum), and much more unusual, increased uptake foci within some left supraclavicular and left axillary lymph nodes. Owing to the rarity of spread to supraclavicular lymph nodes, surgical removal was performed and revealed prostate cancer metastases. PMID:25674860

  2. CT of lumbar spine disk herniation: correlation with surgical findings

    SciTech Connect

    Firooznia, H.; Benjamin, V.; Kricheff, I.I.; Rafii, M.; Golimbu, C.

    1984-03-01

    Computed tomography (CT) of the lumbar spine was performed with selectively positioned 5-mm-thick axial cross sections to examine each disk level from the top of the neural foramen to the pedicle of the next caudad vertebra. One hundred consecutive patients with 116 surgical disk explorations were reviewed. There was agreement between the CT and surgical findings in 89 patients (104 explorations) in determination of presence or absence of a herniated nucleus pulposus (HNP). Discrepancy occurred in 12 instances (11 patients): two because of incorrect interpretations, five in previously operated patients, three in spondylolisthesis, and two in spinal stenosis. There were 97 true-positives, eight false-negatives, seven true-negatives, and four false-positives. If nine previously operated patients are excluded from the study, then CT was accurate in detection of presence or absence of an HNP in 93% of the disk explorations.

  3. Unusual histopathological findings in appendectomy specimens: A retrospective analysis and literature review

    PubMed Central

    Akbulut, Sami; Tas, Mahmut; Sogutcu, Nilgun; Arikanoglu, Zulfu; Basbug, Murat; Ulku, Abdullah; Semur, Heybet; Yagmur, Yusuf

    2011-01-01

    AIM: To document unusual findings in appendectomy specimens. METHODS: The clinicopathological data of 5262 patients who underwent appendectomies for presumed acute appendicitis from January 2006 to October 2010 were reviewed retrospectively. Appendectomies performed as incidental procedures during some other operation were excluded. We focused on 54 patients who had unusual findings in their appendectomy specimens. We conducted a literature review via the PubMed and Google Scholar databases of English language studies published between 2000 and 2010 on unusual findings in appendectomy specimens. RESULTS: Unusual findings were determined in 54 (1%) cases by histopathology. Thirty were male and 24 were female with ages ranging from 15 to 84 years (median, 32.2 ± 15.1 years). Final pathology revealed 37 cases of enterobiasis, five cases of carcinoids, four mucinous cystadenomas, two eosinophilic infiltrations, two mucoceles, two tuberculosis, one goblet-cell carcinoid, and one neurogenic hyperplasia. While 52 patients underwent a standard appendectomy, two patients who were diagnosed with tuberculous appendicitis underwent a right hemicolectomy. All tumors were located at the distal part of the appendix with a mean diameter of 6.8 mm (range, 4-10 mm). All patients with tumors were alive and disease-free during a mean follow-up of 17.8 mo. A review of 1366 cases reported in the English literature is also discussed. CONCLUSION: Although unusual pathological findings are seldom seen during an appendectomy, all appendectomy specimens should be sent for routine histopathological examination. PMID:21528073

  4. Renal infarction: CT diagnosis and correlation between CT findings and etiologies

    SciTech Connect

    Wong, W.S.; Moss, A.A.; Federle, M.P.; Cochran, S.T.; London, S.S.

    1984-01-01

    The CT scans and the clinical records of 12 patients who had renal infarction were reviewed. The renal infarcts were classified as either focal or global. The CT findings were correlated with the etiologies of renal infarction. Embolism was the most common cause of renal infarcts that were multifocal with involvement of both kidneys. Trauma caused a unilateral global type of infract. A case of sickle cell anemia presented with multiple ''slit-like'' focal infarcts and enlarged kidneys. Forty-seven per cent of infarcts demonstrated the cortical rim sign, 11% were acapsular fluid collection, and 6% had an abnormally thickened renal fascia.

  5. Unusual histopathological findings in appendectomy specimens from patients with suspected acute appendicitis

    PubMed Central

    Yilmaz, Mehmet; Akbulut, Sami; Kutluturk, Koray; Sahin, Nurhan; Arabaci, Ebru; Ara, Cengiz; Yilmaz, Sezai

    2013-01-01

    AIM: To investigate the prevalence and implications of unusual histopathological findings in appendectomy specimens from patients with suspected acute appendicitis. METHODS: The demographic and histopathological data of 1621 patients (? 16 years-old) who underwent appendectomy to treat an initial diagnosis of acute appendicitis between January 1999 and November 2011 were retrospectively assessed. Microscopic findings were used to classify the patients under six categories: appendix vermiformis, phlegmonous appendicitis, gangrenous appendicitis, perforated appendicitis, supurative appendicitis, and unusual histopathologic findings. The demographic and clinicopathologic characteristics of patients with unusual histopathologic findings were evaluated in detail, and re-analysis of archived resected appendix specimens was carried out. RESULTS: A total of 912 males and 709 females, from 16 to 94 years old, were included in the study and comprised 789 cases of suppurative appendicitis, 370 cases of appendix vermiformis, 243 cases of perforated gangrenous appendicitis, 53 cases of flegmaneous appendicitis, 32 cases of gangrenous appendicitis, and 134 (8.3%) cases of unusual histopathological findings. The unusual histopathological findings included fibrous obliteration (n = 62), enterobius vermicularis (n = 31), eosinophilic infiltration (n = 10), mucinous cystadenoma (n = 8), carcinoid tumor (n = 6), granulomatous inflammation (n = 5), adenocarcinoma (n = 4; one of them mucinous), and mucocele (n = 3), adenomatous polyp (n = 1), taenia sup (n = 1), ascaris lumbricoides (n = 1), appendiceal diverticula (n = 1), and B cell non-hodgkin lymphoma (n = 1). None of the 11 patients with subsequent diagnosis of tumor were suspected of cancer prior to the appendectomy. CONCLUSION: Even when the macroscopic appearance of appendectomy specimens is normal, histopathological assessment will allow early diagnosis of many unusual diseases. PMID:23840147

  6. Imaging Findings of an Unusually Located Hydatid Cyst Presented as a Sacrococcygeal Mass

    PubMed Central

    Yilmaz, Guliz; Halil Akpinar, Suha

    2015-01-01

    Hydatid disease (HD) is a parasitic infection that is most commonly caused by the larval stage of Echinococcus granulosus. Unusual location for this disease can cause diagnostic and therapeutic problems. We herein report a case of sacrococcygeal HD at an unusual location in a 30-year-old woman. She was evaluated using computed tomography (CT) imaging and magnetic resonance imaging (MRI) after the demonstration of the lucent bone lesion on plain pelvic radiography. There was an expansile lytic mass without contrast enhancement suggesting a cystic mass in the sacrococcygeal region. Medical history revealed that she had undergone surgery for liver HD and the serological test results were diagnostic for HD. In light of this, no surgery was carried out for this cystic mass and she was followed with the diagnosis of sacrococcygeal HD. PMID:25901257

  7. Dual-phase CT findings of groove pancreatitis?

    PubMed Central

    Zaheer, Atif; Haider, Maera; Kawamoto, Satomi; Hruban, Ralph H.; Fishman, Elliot K.

    2015-01-01

    Purpose Groove pancreatitis is a rare focal form of chronic pancreatitis that occurs in the pancreaticoduodenal groove between the major and minor papillae, duodenum and pancreatic head. Radiologic appearance and clinical presentation can result in suspicion of malignancy rendering pancreaticoduodenectomy inevitable. This study reports dual phase CT findings in a series of 12 patients with pathology proven groove pancreatitis. Materials and methods Retrospective review of preoperative CT findings in 12 patients with histologically proven groove pancreatitis after pancreaticoduodenectomy. Size, location, attenuation, presence of mass or cystic components in the pancreas, groove and duodenum, calcifications, duodenal stenosis and ductal changes were recorded. Clinical data, laboratory values, endoscopic ultrasonographic and histopathological findings were collected. Results Soft tissue thickening in the groove was seen in all patients. Pancreatic head, groove and duodenum were all involved in 75% patients. A discrete lesion in the pancreatic head was seen in half of the patients, most of which appeared hypodense on both arterial and venous phases. Cystic changes in pancreatic head were seen in 75% patients. Duodenal involvement was seen in 92% patients including wall thickening and cyst formation. The main pancreatic duct was dilated in 7 patients, with an abrupt cut off in 3 and a smooth tapering stricture in 4. Five patients had evidence of chronic pancreatitis with parenchymal calcifications. Conclusion Presence of mass or soft tissue thickening in the groove with cystic duodenal thickening is highly suggestive of groove pancreatitis. Recognizing common radiological features may help in diagnosis and reduce suspicion of malignancy. PMID:24935140

  8. A patient with features of albright hereditory osteodystrophy and unusual neuropsychiatric findings without coding Gsalpha mutations

    PubMed Central

    2014-01-01

    Background Pseudohypoparathyroidism(PHP) is a heterogeneous group of rare metabolic disorders characterized by hypocalcemia and hyperphosphatemia resulting from PTH resistance. Different forms of PHP have been reported based on biochemical and clinical manifestation and genetic findings. Most of these forms are caused by defects in GNAS, an imprinted gene locus with multiple subunits. We reported a 12- year- old girl with unusual clinical manifestations of Pseudopseudohypoparathyroidism(PPHP). Methods After clinical and biochemical evaluations, the patients’ genomic DNA was isolated from peripheral blood leukocytes using salting out method. The whole coding sequences of GNAS gene including 13 exons were amplified by PCR. Quantitative PCR reactions were performed too. Findings We described a 12- year- old girl with Albright Hereditory osteodystrophy (AHO) phenotype, poor school performance, some abnormal movements, TSH resistance with normal serum calcium and phosphorus levels and normal Gs? bioactivity with no mutation in GNAS exons. Unusual neuropsychiatric findings in this patient were compatible with Asperger syndrome. Conclusions According to our findings this patient could not be categorized in any of PHP subgroups. Identifying of such individuals may be useful to discover different genetic patterns in pseudohypoparathyroidism and pseudopseudohypoparathyroidism. It is important to identify patients in whom PHP is caused by novel GNAS mutations, as careful investigations of these findings will likely further our knowledge of this complex and this unique disorder. In addition this case presented with unusual neuropsychiatric findings which has not been reported up to now. PMID:24959527

  9. Unusual imaging findings in brain and spinal cord in two siblings with maple syrup urine disease.

    PubMed

    Bhat, Maya; Prasad, Chandrajit; Bindu, Parayil Sankaran; Aziz, Zarina; Christopher, Rita; Saini, Jitender

    2013-10-01

    Maple syrup urine disease (MSUD) is a rare metabolic disease affecting the neural tissue. While the brain abnormalities present on MRI are well known, spinal imaging features have not been studied. We herewith report an unusual finding of enlarged Virchow Robin spaces in brain and novel spinal cord changes in two biochemically diagnosed cases of MSUD. To the best of our knowledge, spinal MRI findings in cases of MSUD have not been previously reported. Knowledge of spinal MRI findings may be useful in diagnosis of this rare disorder. PMID:23279201

  10. Unusual findings in inguinal hernia surgery: Report of 6 rare cases

    PubMed Central

    Ballas, K; Kontoulis, Th; Skouras, Ch; Triantafyllou, A; Symeonidis, N; Pavlidis, Th; Marakis, G; Sakadamis, A

    2009-01-01

    Background and aim: To present our experience with unexpected findings during hernia surgery, either unusual hernial contents or pathologic entities, like neoplastic masses, masquerading as a hernia. Patients and methods: We studied retrospectively 856 patients with inguinal hernia who were admitted to our surgical department over a 9-year period. In addition, our study included patients complaining of inguinal protrusion, even without a definitive diagnosis of inguinal hernia upon admission. Results: Five patients presented with unusual hernial contents. Three of them had a vermiform appendix in their sac. Acute appendicitis (Amyands hernia) was found in only one case. One patient had epiploic appendagitis related with a groin hernia. Moreover, an adult woman was diagnosed with ovarian and tubal inguinal hernia. Finally, we report a case of a massive extratesticular intrascrotal lipoma, initially misdiagnosed as a scrotal hernia. Conclusion: a hernia surgeon may encounter unexpected intraoperative findings. It is important to be prepared to detect them and apply the appropriate treatment. PMID:19918306

  11. Wassel's Type V Polydactyly with Plain Radiographic and CT Findings

    PubMed Central

    Mete, Berna Dirim; Altay, Canan; Gursoy, Merve; Oyar, Orhan

    2015-01-01

    Duplication of the thumb is the most common polydactyly of the hand. Wassel's classification is frequently used to classify the polydactyly of the hand. His classification was based on the level of duplication and the number of bones in the thumb, and has seven groups (Types I–VII) according to the level of the bifurcation, except for his Type VII. The most common type is the bifurcation at the metacarpophalangeal joint (Type IV). In this paper, we report a very rare case of Type V thumb polydactyly in a 42-year-old man, who presented with swan neck deformity of the radial thumb and discuss the plain radiography and computed tomography (CT) findings. Kumar recently reported plain radiography findings in a case of bifid first metacarpal in a 13-year-old girl, who presented with swan neck deformity of the left thumb. To our knowledge, our case is the second presented case that has a swan neck deformity with bifid metacarpal.

  12. Unusual Features in an Adult Pancreatic Hemangioma: CT and MRI Demonstration

    PubMed Central

    Wu, Mei

    2013-01-01

    Hemangiomas in the pancreas are very rare and only a few cases in adulthood have been reported in the literature. We describe a case of pancreatic hemangiomas in an adult with unique imaging findings. A 23-year-old woman visited the hospital for an incidentally detected pancreatic mass. CT and MRI revealed a multilocular cyst with fluid-fluid levels and no obvious enhancement. The patient underwent surgery and the mass was confirmed as a pancreatic hemangioma. The radiological features and differential diagnosis of this rare lesion are discussed. PMID:24043972

  13. Three rounds as "tandem bullets": unusual findings in a case of a suicidal gunshot to the head.

    PubMed

    Tattoli, Lucia; Schmid, Simone; Tsokos, Michael

    2014-12-01

    We report an unusual case of suicide in which three 7.65 caliber projectiles were found in the single gunshot wound to the head of a 53-year-old man. Based on data collected at the death scene, CT scan, autopsy findings, and ballistics analysis, the events were reconstructed as follows: two 7.65 mm rounds had already been fired from the 9 mm Makarov pistol the subject was using but, being a smaller caliber, the cartridges had slipped forward and lodged within the barrel. When a third 7.65 mm cartridge was chambered and the gun fired for the third time, the nose of the last bullet hit the lodged bullets and all three rounds were propelled out of the muzzle in tandem as a single shot. Ballistic investigations confirmed that the kinetic energy of the three tandem bullets would have been sufficient to perforate the skull. In cases of gunshot wounds where the manner of death is unclear, a number of well-described circumstantial parameters, such as an atypical anatomical location of the gunshot, unusual firearm, or ammunition, as well as ambiguous autopsy findings, can raise doubts about the manner of death. In very rare cases, despite a single entrance wound, two or more bullets are recovered from the body, fired by the same weapon at the same time (the so-called "tandem bullet" phenomenon). Injuries by "tandem bullets" have crucial implications in gunshot deaths because of the mismatch between the number of entrance and exit wounds and the number of bullets found in or near the body. PMID:25091600

  14. Automatically Pairing Measured Findings across Narrative Abdomen CT Reports

    PubMed Central

    Sevenster, Merlijn; Bozeman, Jeffrey; Cowhy, Andrea; Trost, William

    2013-01-01

    Radiological measurements are one of the key variables in widely adopted guidelines (WHO, RECIST) that standardize and objectivize response assessment in oncology care. Measurements are typically described in free-text, narrative radiology reports. We present a natural language processing pipeline that extracts measurements from radiology reports and pairs them with extracted measurements from prior reports of the same clinical finding, e.g., lymph node or mass. A ground truth was created by manually pairing measurements in the abdomen CT reports of 50 patients. A Random Forest classifier trained on 15 features achieved superior results in an end-to-end evaluation of the pipeline on the extraction and pairing task: precision 0.910, recall 0.878, F-measure 0.894, AUC 0.988. Representing the narrative content in terms of UMLS concepts did not improve results. Applications of the proposed technology include data mining, advanced search and workflow support for healthcare professionals managing radiological measurements. PMID:24551406

  15. Pulmonary Tuberculosis Confirmed by Percutaneous Transthoracic Needle Biopsy: Analysis of CT Findings and Review of Correlations with Underlying Lung Disease

    PubMed Central

    Choo, Ji Young; Lee, Ki Yeol; Kim, Mi-young; Kang, Eun-young; Oh, Yu Whan; Lee, Seung Hwa; Seo, Bo Kyung; Je, Bo Kyung

    2014-01-01

    Background: Pulmonary tuberculosis (TB) can produce unusual radiographic findings. Further, negative sputum and bronchoscopic results are common. Early diagnosis is equally as significant as treatment in the reduction of morbidity and mortality associated with pulmonary TB. Aims: The aim of this study was to assess computed tomography (CT) findings of pulmonary TB, confirmed via percutaneous transthoracic needle biopsy (PTNB), and to correlate these findings with coexisting, underlying, lung diseases if present. Study Design: Cross sectional study. Methods: We selected eighty-four patients who were diagnosed with pulmonary TB by way of PTNB. Initially, acid-fast bacilli smear test results from these patients were negative. CT findings were reviewed to detect the presence of parenchymal abnormalities as follows: nodule(s) (<3 cm in diameter), mass (any masses ?3 cm), daughter nodules, air-space consolidation, cavitation, calcification, lymphadenopathy, mediastinal lymphadenopathy, and associated lung parenchymal disease. Results: The CT findings of pulmonary TB confirmed by PTNB included nodules in 44 of 84 (52.4%) cases; 15 of these 44 cases (34.1%) had daughter nodules. The second most common finding was masses in 24 cases (28.6%), nine of which also had daughter nodules. 16 cases (19.0%) displayed nonsegmental consolidation. Of these 16 cases, four had coexisting usual interstitial pneumonia; four others had emphysema. Two patients with a mass had underlying pneumoconiosis. Conclusion: Nodules or a mass mimicking lung cancer were the most common findings on CT scans in patients with pulmonary TB, confirmed via PTNB. The second most common finding was airspace consolidation. Therefore, PNTB is useful for the accurate diagnosis of pulmonary TB in the following cases: airspace consolidation or mass associated with underlying usual interstitial pneumonia, emphysema mimicking lung malignancy or cases of bacterial pneumonia. PMID:25625018

  16. FDG PET/CT findings of common bile duct tuberculosis.

    PubMed

    Dong, Aisheng; Wang, Yang; Gong, Jing; Zuo, Changjing

    2014-01-01

    Common bile duct (CBD) tuberculosis is rare. A 39-year-old woman was referred because of a 5-month history of abdominal pain. Abdominal enhanced MRI and CT showed dilatation of the distal CBD with irregularly thickened wall. Enhanced CT revealed enlarged retroperitoneal lymph nodes. FDG PET/CT showed increased FDG uptake of the CBD lesion and several retroperitoneal lymph nodes with slight FDG uptake. CBD cholangiocarcinoma with retroperitoneal lymph node metastasis was suspected. CBD tuberculosis was confirmed by endoluminal biopsy. Tuberculosis should be considered in the differential diagnosis of abnormal biliary FDG accumulation, particularly in tuberculosis endemic areas. PMID:23579971

  17. CT Findings During Phase of Accelerated Deterioration in Patients with Idiopathic Pulmonary Fibrosis

    Microsoft Academic Search

    Masanori Akira; Hironobu Hamada; Mitsunori Sakatani; Chikako Kobayashi; Michiho Nishioka; Satoru Yamamoto

    OBJECTIVE. Most patients with idiopathic pulmonary fibrosis (IPF) show slowly pro- gressive deterioration. However, accelerated deterioration also occurs in patients with IPF who have previously shown slowly progressive deterioration. The purpose of this study was to evaluate the CT findings of accelerated deterioration in patients with IPF. MATERIALS AND METHODS. We evaluated the CT findings of I 7 patients with

  18. Intense uptake evidenced by 18F-FDG PET/CT without a corresponding CT finding--dream or reality?

    PubMed

    Caobelli, Federico; Pizzocaro, Claudio; Guerra, Ugo Paolo

    2014-01-01

    Although 18F-fluoro-deoxy-glucose (FDG) positron emission tomography (PET) has been widely validated and extensively used in the latest years in clinical practice, interpretation of PET/CT images can be affected by several pitfalls. We here present a case of intense lung uptake in a patient without a corresponding finding on CT images, probably due to a microembolism produced during the injection process and located in small vascular structures of the lung parenchyma. PMID:24610649

  19. CT findings in sclerosing mesenteritis (panniculitis): spectrum of disease.

    PubMed

    Horton, Karen M; Lawler, Leo P; Fishman, Elliot K

    2003-01-01

    Sclerosing mesenteritis is a complex inflammatory disorder of the mesentery. Although sclerosing mesenteritis is often associated with other idiopathic inflammatory disorders such as retroperitoneal fibrosis, sclerosing cholangitis, Riedel thyroiditis, and orbital pseudotumor, its exact cause is unknown. The computed tomographic (CT) appearance of sclerosing mesenteritis will vary depending on the predominant tissue component (fat, inflammation, or fibrosis). CT plays an important role in suggesting the diagnosis in the proper clinical setting and can be useful in distinguishing sclerosing mesenteritis from other mesenteric diseases with similar CT features such as carcinomatosis, carcinoid tumor, lymphoma, desmoid tumor, and mesenteric edema. Nevertheless, surgical biopsy and pathologic analysis are usually necessary to make the diagnosis. Treatment may consist of therapy with steroids, colchicine, immunosuppressive agents, or orally administered progesterone. Surgical resection is sometimes attempted for definitive therapy, although the surgical approach is often limited by vascular involvement. CT with three-dimensional volume rendering is optimal for accurate, noninvasive follow-up of sclerosing mesenteritis and of any potential complications. PMID:14615565

  20. Primary Cardiac Lymphoma: Helical CT Findings and Radiopathologic Correlation

    SciTech Connect

    Marco de Lucas, Enrique, E-mail: radmle@humv.es; Pagola, Miguel Angel [HospitalUniversitario Marques de Valdecilla, Santander, Department of Radiology (Spain); Fernandez, Fidel [Hospital Universitario Marques de Valdecilla, Santander, Department ofPathology (Spain); Lastra, Pedro; Delgado, M. Luisa Ruiz; Sadaba, Pablo [HospitalUniversitario Marques de Valdecilla, Santander, Department of Radiology (Spain); Pinto, Jesus [Hospital Universitario Marques de Valdecilla, Santander, Department ofPathology (Spain); Ballesteros, Ma Angeles [Hospital Universitario Marques de Valdecilla, Santander, Department of Intensive Care Medicine (Spain); Ortiz, Antonio [HospitalUniversitario Marques de Valdecilla, Santander, Department of Radiology (Spain)

    2004-03-15

    Primary tumors of the heart are extremely rare.Clinical manifestations are nondiagnostic and the patients are often misdiagnosed. Magnetic resonance imaging and echocardiography are standard in this diagnostic workup. We report a case of a man with acromegaly, dysphagia, chest pain and weight loss. An invasive cardiac mass was diagnosed by helical-CT. Autopsy demonstrated a B-cell aggressive lymphoma.

  1. CT imaging of intrabiliary growth of colorectal liver metastases: a comparison of pathological findings of resected specimens.

    PubMed

    Okano, K; Yamamoto, J; Okabayashi, T; Sugawara, Y; Shimada, K; Kosuge, T; Yamasaki, S; Furukawa, H; Muramatsu, Y

    2002-06-01

    The objective of this study was to assess the usefulness of CT in the pre-operative evaluation of macroscopic intrabiliary tumour growth of colorectal liver metastases. 25 metastatic nodules of 18 patients who underwent an initial hepatectomy for colorectal liver metastasis were retrospectively evaluated. The CT appearance and pathological findings of the resected specimens were correlated. A number of unusual peritumoral features associated with intrabiliary tumour growth were detected by pre-operative CT. These were classified into three patterns: (1) thickened portal tract; (2) intrahepatic bile duct dilatation; and (3) a wedge-shaped area with enhancement. In 8 (32%) of the 25 nodules the portal tract was depicted as thicker than usual and these features were found proximal to the tumour in three instances, distal to the tumour in four instances, and both proximal and distal in one instance. All of the three intrabiliary tumours larger than 30 mm resulted in thickening of the portal tract. Intrahepatic bile duct dilatation was detected in association with 10 (40%) of 25 nodules. Bile duct dilatation was observed in more than one segment when intrabiliary tumour reached the hepatic hilus from the tumour. The presence of bile duct dilatation was not related to either the size of the tumour or the extent of intrabiliary tumour growth. An abnormally high density wedge-shaped area on contrast enhanced CT was another feature indicating intrabiliary tumour growth and was seen in association with four nodules. Such areas were seen in the liver parenchyma distal to the tumour on three occasions, or encompassing the tumour on one accasion. This wedge-shaped area appeared as a well demarcated dark red-brown region in the cut surface of the resected specimen. CT was useful for detecting the presence of intrabiliary tumour growth with these three patterns of radiological findings in patients with liver metastases from colorectal cancer PMID:12124235

  2. EEG, CT and neurosonographic findings in patients with postischemic seizures

    Microsoft Academic Search

    Susanna Horner; Xiu-Shi Ni; Margret Duft; Kurt Niederkorn; Helmut Lechner

    1995-01-01

    Seventy-two patients with postischemic seizures were evaluated with electroencephalography (EEG), computerized tomography (CT) and neurosonography. There were 24% early-onset and 76% late-onset initial seizures. Early-onset seizure was more likely to be simple partial (53%), whereas late-onset seizure was more likely to be primarily generalized (56%). 76% early-onset and 80% late-onset seizures were single. Status epilepticus was more frequent in early-onset

  3. Subcarinal lymph node enlargement: radiographic findings and CT correlation

    SciTech Connect

    Mueller, N.L.; Webb, W.R.; Gamsu, G.

    1985-07-01

    Detection of subcarinal lymph node enlargement on the posteroanterior chest radiograph was assessed in 90 patients who also had computed tomography (CT). Sixty of the 90 patients had normal-sized and 30 had enlarged (>15 mm diameter) subcarinal lymph nodes on CT. An abnormality in the contour of the azygoesophageal recess interface was present on plain radiographs in only 23% of patients with lymphadenopathy; increased subcarinal opacity was present in 40%. The external surface of the medial wall of the right main-stem bronchus and bronchus intermedius was visible in 87% of patients with normal-sized lymph nodes but in only 27% of patients with lymphadenopathy. CT showed that the medial wall of the right main-stem and intermediate bronchi normally is delineated laterally by air within the bronchus and medially by lung or subcarinal fat. Nonvisualization may be due to replacement of lung or fat by enlarged nodes or tumor and may be helpful in assessing patients with suspected subcarinal adenopathy.

  4. Renal cell carcinoma: Correlation of CT findings with nuclear morphologic grading in 100 tumors

    Microsoft Academic Search

    B. A. Birnbaum; M. A. Bosniak; G. A. Krinsky; D. Cheng; J. Waisman; M. M. Ambrosino

    1994-01-01

    The contrast-enhanced preoperative computed tomographic (CT) scans and microscopic slides of 94 patients with 100 surgically resected renal cell carcinomas (RCCs) were retrospectively and independently reviewed in order to correlate the CT imaging findings of RCC with nuclear grading. As nuclear grade increased, RCCs were more likely to be of higher stage and greater size at presentation, and appeared more

  5. Dynamic ultrafast high resolution CT findings in a case of Swyer-James syndrome

    Microsoft Academic Search

    E. J. Stern; T. L. Samples

    1992-01-01

    In a patient with Swyer-James syndrome, the dynamic, ultrafast HRCT (DUHRCT) findings show multifocal bilateral air-trapping that was not seen on chest radiography or conventional CT scan. This technique accentuates theaair trapping associated with post-infectious obliterative bronchiolitis, which is underappreciated by plain chest radiography and conventional CT.

  6. Clinically Significant Abnormal Findings on the ''Nondiagnostic'' CT Portion of Low-Amperage-CT Attenuation-Corrected Myocardial Perfusion SPECT\\/CT Studies

    Microsoft Academic Search

    Sibyll Goetze; Harpreet K. Pannu; Richard L. Wahl

    Attenuation correction is recommended to optimize the perfor- mance of cardiac SPECT. The 2.5-mA CT commonly used for this purpose in myocardial perfusion SPECT is generally consid- ered ''nondiagnostic'' in quality. In other areas of cardiac and hybrid imaging, diagnostically relevant abnormal findings on higher-quality CT studies have been described. The purpose of this study was to establish the frequency

  7. Palatal myoclonus and unusual MRI findings in a patient with membranous lipodystrophy.

    PubMed

    Malandrini, A; Scarpini, C; Palmeri, S; Villanova, M; Parrotta, E; Tripodi, S; Giani, S; DeFalco, D; Guazzi, G C

    1996-01-01

    We describe an Italian male patient, deceased at 29 years of age, affected with a syndrome characterized by childhood-onset seizures, mental disorders, motor dysfunction and bilateral palatal myoclonus. Skeletal X-ray examination showed diffuse osteopenia of the tubular bones, and cyst-like lesions in the carpal, metacarpal and tarsal bones bilaterally and in the proximal end of the right femur. Skin biopsy showed subcutaneous and adipose tissue containing membranocystic structures. Cerebral MR and CT scans showed fronto-temporal atrophy, altered signal of the white matter and mineralization of the caudate and dentate nuclei. These findings strongly recall polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy, but in the present case, bone alterations were not prominent; moreover, palatal myoclonus has never previously been described in this syndrome. PMID:8907345

  8. Unusual Findings in Appendectomy Specimens of Adults: Retrospective Analyses of 1466 Patients and a Review of Literature

    PubMed Central

    Yabanoglu, Hakan; Caliskan, Kenan; Ozgur Aytac, Huseyin; Turk, Emin; Karagulle, Erdal; Kayaselcuk, Fazilet; Akin Tarim, Mehmet

    2014-01-01

    Background: Diseases and tumors of the appendix vermiformis are very rare, except acute appendicitis. Objectives: This retrospective study was conducted to document the unusual findings in appendectomy specimens. Patients and Methods: Data of 1466 adult patients were gathered retrospectively. Appendectomy was performed in 1169 and in 297 patients following a diagnosis of acute appendicitis and during other abdominal operations, respectively. The data of 57 (3.88 %) patients who were pathologically reported to have unusual appendix findings were retrospectively collected. The records were analyzed according to patients’ age, gender, clinical presentations, operative reports, pathological reports and follow up. Results: Unusual pathologic examination findings were detected in the appendectomy specimens of 57 patients with a mean age of 48.34 ± 19. Twenty-nine patients (50.8 %) were male and 28 (49.2 %) were female. Normal appendix tissues were observed in specimens of 26 (45.6 %) patients and inflamed appendix in 31 (54.3 %). The most common unusual finding was parasitic diseases of the intestine. Pathological diagnosis of malignancy and benign features were reported in specimens of 14 and 43 patients, respectively. Macroscopic evaluation of appendectomy specimens during surgery might result in negligence of the presence of unusual pathology. Conclusions: Even if the macroscopic appearance of the specimen is normal or acute appendicitis, we suggest routine histopathological examination. PMID:24719727

  9. CT-SPECT fusion to correlate radiolabeled monoclonal antibody uptake with abdominal CT findings

    SciTech Connect

    Kramer, E.L.; Noz, M.E.; Sanger, J.J.; Megibow, A.J.; Maguire, G.Q. (Memorial Sloan-Kettering Cancer Center, New York, NY (USA))

    1989-09-01

    To enhance the information provided by computed tomography (CT) and single photon emission computed tomography (SPECT) performed with radiolabeled, anti-carcinoembryonic antigen monoclonal antibody (MoAb), the authors performed fusion of these types of images from eight subjects with suspected colorectal adenocarcinoma. Section thickness and pixel size of the two studies were matched, coordinates of corresponding points from each study were identified, and CT sections were translated, rotated, and reprojected to match the corresponding SPECT scans. The CT-SPECT fusion enabled identification of anatomic sites of tumor-specific MoAb accumulation in four cases, showed non-specific MoAb accumulation in two, and helped confirm information only suggested by the two studies separately in one.

  10. Unusual CT Hyperattenuating Dermoid Cyst of Cerebellum: A New Case Report and Literature Review

    Microsoft Academic Search

    Zhao-Jian Li; Yuan-Xin Miao; Peng Sun; Yu-Jun Li; Yi-He Dou; Jian Xu; Xin Chen; Yun-Xia Jiang

    Almost all intracranial dermoid cysts typically display low-density lesions on plain computerized tomography (CT) scans due\\u000a to abundant lipids content. CT hyperattenuating dermoid cyst (CHADC) is very uncommon with only nine case reports in the literature\\u000a update, which occurs exclusively in the posterior fossa. Moreover, CHADC with mural nodule is exceptionally rare, and only\\u000a one such case was documented previously.

  11. CT-SPECT FUSION TO CORRELATE RADIOLABELED MONOCLONAL-ANTIBODY UPTAKE WITH ABDOMINAL CT FINDINGS

    Microsoft Academic Search

    E. L. Kramer; M. E. Noz; J. J. Sanger; A. J. Megibow; G Q Maguire Jr.

    1989-01-01

    To enhance the information provided by computed tomography (CT) and single photon emission computed tomography (SPECT) performed with radiolabeled, anti-carcinoembryonic antigen monoclonal antibody (MoAb), the authors performed fusion of these types of images from eight subjects with suspected colorectal adenocarcinoma. Section thickness and pixel size of the two studies were matched, coordinates of corresponding points from each study were identified,

  12. Nonconcordance between Clinical and Head CT Findings: The Specter of Overdiagnosis

    PubMed Central

    O'Laughlin, Kelli N.; Hoffman, Jerome R.; Go, Steven; Gabayan, Gelareh Z.; Iqbal, Erum; Merchant, Guy; Lopez-Freeman, Roberto A.; Zucker, Michael I.; Mower, William R.

    2013-01-01

    Background. It is unclear whether history and physical examination findings can predict abnormalities on head computed tomography (CT) believed to indicate increased risk of lumbar-puncture- (LP-) induced brain herniation. The objectives of this study were to (1) identify head CT findings felt to be associated with increased risk of brain herniation and (2) to assess the ability of history and physical examination to predict those findings. Methods. Using a modified Delphi survey technique, an expert panel defined CT abnormalities felt to predict increased risk of LP-induced brain herniation. Presence of such findings on CT was compared with history and physical examination (H&P) variables in 47 patients. Results. No H&P variable predicted “high-risk” CT; combining H&P variables to improve sensitivity led to extremely low specificity and still failed to identify all patients with high-risk CT. Conclusions. “High-risk” CT is not uncommon in patients with clinical characteristics known to predict an absence of actual risk from LP, and thus it may not be clinically relevant. “Overdiagnosis” will be increasingly problematic as technological advances identify increasingly subtle deviations from “normal.” PMID:24222854

  13. Transient and rapidly resolving intrahepatic portal gas: CT findings.

    PubMed

    Coulier, B; Van den Broeck, S; Coppens, J-P

    2008-01-01

    Hepatic portal gas (HPG) has historically been associated with high (75% or over) mortality rates related to abdominal dramatic conditions and has served as an indicator for urgent exploratory laparotomy. Over the last two decades, the greater availability and higher speed of use of CT as well as improvement in the management of critically ill patients have increased the sensitivity of imaging HPG. HPG has been found associated with a broad range of diseases, some of which are benign and do not necessarily require urgent exploratory laparotomy in the absence of signs of intra-abdominal acute condition or systemic toxicity. We present a case of transient and rapidly resolving HPG found in a 61-year-old male admitted with hypovolemic shock due to upper gastrointestinal occlusion. HPG rapidly resolved after resuscitation of the patient with intensive re-hydration and drastic decompression of the fluid-full stomach through a nasogastric tube. The physiopathology and causes of HPG are briefly reviewed and its potential clinical significance is resituated. PMID:19051945

  14. An Unusual Right Ventricle Metastasis From Mandible Squamous Cell Carcinoma Detected On FDG PET/CT.

    PubMed

    Lu, Yang

    2015-04-01

    A patient with history of mandible squamous cell carcinoma underwent an FDG PET/CT scan. A focal hypermetabolic right ventricle lesion was noted and suggestive of metastasis. A cardiac MRI verified the right ventricle wall mass. Further endomyocardial biopsy confirmed the diagnosis of metastatic squamous cell carcinoma. PMID:25608149

  15. CT and MRI findings in X-linked progressive deafness.

    PubMed

    Altay, Hakan; Sava?, Recep; O?üt, Fatih; Kirazli, Tayfun; Alper, Hüdaver

    2008-09-01

    Congenital X-linked mixed deafness is a rare anomaly that has typical features and can be diagnosed on the basis of progressive mixed hearing loss and the typical imaging findings. Recognition of these findings may alter the course of treatment and perilymph gushing can be avoided. A 10-year-old male patient presented with a history of progressive hearing loss. Computed tomography of the temporal bones showed bulbous dilatation of the fundi of the internal auditory canals (IAC) and the absence of the bony plates separating the basal turn of the cochleas and IAC. Magnetic resonance imaging demonstrated obliteration of the labyrinthine spaces at the right side. PMID:18814129

  16. Pancreatic metastasis of renal cell carcinoma: multidetector CT findings

    Microsoft Academic Search

    Sandra Mechó; Sergi Quiroga; Hug Cuéllar; Carmen Sebastiŕ

    2009-01-01

    Pancreatic metastasis of renal cell carcinoma is more prevalent than the rates reported in the literature before the development\\u000a of multidetector computed tomography (MDCT). These lesions are usually asymptomatic and used to be an incidental finding detected\\u000a on radiological follow-up of these patients. If they are not associated with extrapancreatic involvement, they show an excellent\\u000a response to surgical treatment. Thus,

  17. Omental Well-Differentiated Liposarcoma: US, CT and MR Findings

    PubMed Central

    Meloni, Francesco; Feo, Claudio F; Profili, Stefano; Cossu, Maria Laura; Meloni, Giovanni B

    2009-01-01

    Liposarcomas are the most common of sarcoma tumours, they are usually located in the lower limbs, retroperitoneum, or abdominal cavity; up to date, only a few cases of omental liposarcoma with different histotype have been described. We present a case of omental well-differentiated liposarcoma and discuss imaging findings on ultrasound, computed tomography, and magnetic resonance to differentiate omental liposarcomas from other abdominal tumour entities. PMID:23675151

  18. FDG PET/CT in evaluation of unusual cutaneous manifestations of breast cancer.

    PubMed

    Dave, Shaylee R; Samuel, Thomas A; Pucar, Darko; Savage, Natasha; Williams, Hadyn T

    2015-01-01

    Cutaneous metastases of primary internal malignancies are rare, with an incidence of 0.7% to 10.4%. Cutaneous manifestations due to breast cancer are the most common metastases dermatologists observe, with a prevalence of 2.4% and an incidence of 23.9%. Presence of cutaneous metastases is usually a late event in disease progression, indicating grave prognosis. Recognition of cutaneous breast cancer metastases significantly alters therapeutic plans, especially when the disease was thought to be successfully cured. F-FDG PET CT imaging can detect cutaneous metastasis and sites of distant metastases and monitor response to therapy. We report 3 patients with cutaneous-predominant breast carcinoma seen by FDG PET/CT. PMID:25140546

  19. Accumulation of PBDEs in an urban river otter population and an unusual finding of BDE-209.

    PubMed

    Nelson, Cait; Drouillard, Ken; Cheng, Kimberly; Elliott, John; Ismail, Nargis

    2015-01-01

    River otter scat samples (n = 77) and blood samples (n = 16) collected through non-invasive field collections and live-capture activities (November 2009 to October 2010) along the coastline of Southern Vancouver Island, near Victoria, British Columbia (BC) were analyzed for polybrominated diphenyl ethers (PBDEs). ?PBDEs were highest in urbanized regions of Victoria Harbour for blood (1.12 ?g/g lipid weight) and scat (0.35 ?g/g lipid weight). A location effect between zones was confirmed statistically for blood but not for scat. Specific congeners with the highest concentrations overall were BDE-47 in blood samples (0.37 ?g/g lipid weight) and BDE-206 (0.18 ?g/g lipid weight) and BDE-47 (0.16 ?g/g lipid weight) in scat samples. There was also an unusual finding of extremely high levels of BDE-209 in 2 scat samples (163 and 956 ?g/g lipid weight). The patterns of select congeners (BDE 47, 99, 100, 153, 154) measured in blood and scat were found not to be significantly different (Chi-square Test, X2 = 21.08, DF = 4, p = 0003). The most prominent congeners within Victoria Harbour were BDE-47 for both blood (0.82 mg/kg lipid weight) and scat (0.26 mg/kg lipid weight) followed by BDE-206 (0.18 ?g/g lipid weight) and BDE-207 (0.10 ?g/g lipid weight) for scat only. Comparable levels of BDE-47 were reported across the study area whereas BDE 206 and 207 were only observed in Victoria Harbour (scat). Toxicological effects of PBDEs in rivers otters from Victoria, BC are still unknown however the predominance of BDE-47 could have negative implication as an endocrine disruptor. PMID:25463257

  20. Comparison of clinical findings between intensity-windowed versus CLAHE presentation of chest CT images

    E-print Network

    North Carolina at Chapel Hill, University of

    Comparison of clinical findings between intensity-windowed versus CLAHE presentation of chest CT significantly different overall, there are specific clinical findings where the radiologists were less applied to clinical material and to compare the diagnostic information perceived by the radiologists from

  1. Proliferating Trichilemmal Tumors: CT and MR Imaging Findings in Two Cases, One with Malignant Transformation

    Microsoft Academic Search

    Hyung-Jin Kim; Tae Sook Kim; Kyung-Hee Lee; Young Mo Kim; Chang Hae Suh

    Summary: We report the imaging findings in two patients with proliferating trichilemmal tumors. In the first patient, the tumor arose on the lower lip, a very unusual location for this type of tumor, and showed malignant transfor- mation with metastasis to a regional lymph node. It was seen as a poorly marginated soft-tissue mass with isointense signal on T1-weighted MR

  2. High-resolution CT findings in Wilson-Mikity syndrome: a case report.

    PubMed

    Reittner, P; Fotter, R; Tillich, M; Popper, H; Lindbichler, F; Reiterer, F

    1998-09-01

    Wilson-Mikity syndrome (WMS), an uncommon cause of respiratory distress presenting after birth, is radiologically characterised by varying degrees of interstitial thickening and bilateral cyst-like foci of hyperinflation. Aetiology and pathogenesis are still unknown. There are few reports of WMS in the paediatric literature and none describing the features and value of high-resolution CT. The purpose of this report is to describe the radiographic findings and high-resolution CT appearance of WMS and to correlate them with the histopathological findings. PMID:9732495

  3. Unusual Laboratory Findings in a Case of Norwegian Scabies Provided a Clue to Diagnosis

    PubMed Central

    Wong, Samson S. Y.; Woo, Patrick C. Y.; Yuen, Kwok-yung

    2005-01-01

    The diagnosis of Norwegian scabies was missed for a year for an elderly long-term-care facility resident. Serpiginous tracks were noted on the surface of Sabouraud dextrose agar used for fungal culture of the skin scrapings. This unusual laboratory manifestation must alert clinical microbiologists to the possible diagnosis of scabies. PMID:15872307

  4. Ligamentous compression of the celiac axis: CT findings in five patients.

    PubMed

    Patten, R M; Coldwell, D M; Ben-Menachem, Y

    1991-05-01

    Compression of the celiac trunk by the median arcuate ligament of the diaphragm is an uncommon angiographic and surgical finding that rarely may be symptomatic. We retrospectively reviewed contrast-enhanced abdominal CT scans in five patients with severe ligamentous compression of the celiac axis, confirmed by surgery and/or angiography, and compared the findings with those of enhanced scans of 100 consecutive patients without known ligamentous compression. In all five patients with ligamentous celiac artery compression, CT showed effacement or narrowing of the celiac trunk by an anterior soft-tissue band. Dilated peripancreatic collateral vessels were seen in four cases, and poststenotic dilatation of the distal celiac trunk was seen in two cases. The normal appearance of the vasculature was seen in the majority (76%) of the 100 control subjects, but in eight patients the celiac origin was obscured on CT scans, and in 16 patients the celiac trunk appeared narrow or effaced. Our experience suggests that severe ligamentous celiac artery compression can be identified on CT. However, the isolated CT finding of effacement or obscuration of the celiac axis occurs sufficiently often in normal patients that it is not adequate evidence to establish the diagnosis of celiac artery compression. PMID:2017934

  5. Diagnostic Yield of Recommendations for Chest CT Examination Prompted by Outpatient Chest Radiographic Findings.

    PubMed

    Harvey, H Benjamin; Gilman, Matthew D; Wu, Carol C; Cushing, Matthew S; Halpern, Elkan F; Zhao, Jing; Pandharipande, Pari V; Shepard, Jo-Anne O; Alkasab, Tarik K

    2015-04-01

    Purpose To evaluate the diagnostic yield of recommended chest computed tomography (CT) prompted by abnormalities detected on outpatient chest radiographic images. Materials and Methods This HIPAA-compliant study had institutional review board approval; informed consent was waived. Reports of all outpatient chest radiographic examinations performed at a large academic center during 2008 (n = 29 138) were queried to identify studies that included a recommendation for a chest CT imaging. The radiology information system was queried for these patients to determine if a chest CT examination was obtained within 1 year of the index radiographic examination that contained the recommendation. For chest CT examinations obtained within 1 year of the index chest radiographic examination and that met inclusion criteria, chest CT images were reviewed to determine if there was an abnormality that corresponded to the chest radiographic finding that prompted the recommendation. All corresponding abnormalities were categorized as clinically relevant or not clinically relevant, based on whether further work-up or treatment was warranted. Groups were compared by using t test and Fisher exact test with a Bonferroni correction applied for multiple comparisons. Results There were 4.5% (1316 of 29138 [95% confidence interval {CI}: 4.3%, 4.8%]) of outpatient chest radiographic examinations that contained a recommendation for chest CT examination, and increasing patient age (P < .001) and positive smoking history (P = .001) were associated with increased likelihood of a recommendation for chest CT examination. Of patients within this subset who met inclusion criteria, 65.4% (691 of 1057 [95% CI: 62.4%, 68.2%) underwent a chest CT examination within the year after the index chest radiographic examination. Clinically relevant corresponding abnormalities were present on chest CT images in 41.4% (286 of 691 [95% CI: 37.7%, 45.2%]) of cases, nonclinically relevant corresponding abnormalities in 20.6% (142 of 691 [95% CI: 17.6%, 23.8%]) of cases, and no corresponding abnormalities in 38.1% (263 of 691 [95% CI: 34.4%, 41.8%]) of cases. Newly diagnosed, biopsy-proven malignancies were detected in 8.1% (56 of 691 [95% CI: 6.2%, 10.4%]) of cases. Conclusion A radiologist recommendation for chest CT to evaluate an abnormal finding on an outpatient chest radiographic examination has a high yield of clinically relevant findings. PMID:25531242

  6. Soft-tissue abnormalities of the external auditory canal: Subject review of CT findings

    SciTech Connect

    Chakeres, D.W.; Kapila, A.; LaMasters, D.

    1985-07-01

    The authors review the normal anatomy and discuss characteristic findings of soft-tissue abnormalities of the external auditory canal (EAC). The indications for computed tomography (CT) of the temporal bone have been significantly expanded with the inclusion of soft-tissue abnormalities of the external ear and the auditory canal. CT scans of 25 patients who had soft-tissue abnormalities of the EAC were reviewed. The clinical data were correlated with the radiographic findings. They conclude that CT is the best overall radiographic modality for evaluating the extent and character of soft-tissue abnormalities of the EAC. Significant clinical information that is helpful in patient management decisions is added by this technique.

  7. Correlation between PET/CT results and histological and immunohistochemical findings in breast carcinomas*

    PubMed Central

    Bitencourt, Almir Galvăo Vieira; Lima, Eduardo Nóbrega Pereira; Chojniak, Rubens; Marques, Elvira Ferreira; de Souza, Juliana Alves; Graziano, Luciana; Andrade, Wesley Pereira; Osório, Cynthia Aparecida Bueno de Toledo

    2014-01-01

    Objective To correlate the results of 18F-fluoro-2-deoxy-D-glucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) performed with a specific protocol for assessment of breasts with histological/immunohistochemical findings in breast carcinoma patients. Materials and Methods Cross-sectional study with prospective data collection, where patients with biopsy-confirmed breast carcinomas were studied. The patients underwent PET/CT examination in prone position, with a specific protocol for assessment of breasts. PET/CT findings were compared with histological and immunohistochemical data. Results The authors identified 59 malignant breast lesions in 50 patients. The maximum diameter of the lesions ranged from 6 to 80 mm (mean: 32.2 mm). Invasive ductal carcinoma was the most common histological type (n = 47; 79.7%). At PET/CT, 53 (89.8%) of the lesions demonstrated anomalous concentrations of 18F-FDG, with maximum SUV ranging from 0.8 to 23.1 (mean: 5.5). A statistically significant association was observed between higher values of maximum SUV and histological type, histological grade, molecular subtype, tumor diameter, mitotic index and Ki-67 expression. Conclusion PET/CT performed with specific protocol for assessment of breasts has demonstrated good sensitivity and was associated with relevant histological/immunohistochemical factors related to aggressiveness and prognosis of breast carcinomas. PMID:25741051

  8. Ketorolac tromethamine associated with diffuse pulmonary haemorrhage: high-resolution CT findings.

    PubMed

    Rubin, A Sperb; Hochhegger, B; Irion, K L; Marchiori, E; Binukrishnan, S Rajeswari; Moreira, J S; Zanetti, G

    2010-07-01

    Drug-induced lung diseases are a frequent cause of morbidity. Diffuse pulmonary haemorrhage is an uncommon complication of drug therapy, and is a potentially life-threatening situation. We report the high-resolution CT and clinical findings of a 32-year-old man with diffuse pulmonary haemorrhage induced by ketorolac tromethamine. PMID:20603403

  9. Benign Fibrous Histiocytoma of the Nasal Cavity in a Newborn: MR and CT Findings

    Microsoft Academic Search

    David A. Shrier; Alun R. Wang; Uresh Patel; Ahmad Monajati; Patricia Chess; Yuji Numaguchi

    Summary: Benign fibrous histiocytoma of the nasal cavity in a newborn is rare, and the MR imaging appearance of this entity has not been reported. We present the MR and CT findings in such a case and review the differential diagnosis for intranasal masses in the neonate. Congenital intranasal mass lesions represent one subtype of several possible causes of respiratory

  10. CNS changes in Usher's syndrome with mental disorder: CT, MRI and PET findings

    Microsoft Academic Search

    J Koizumi; K Ofuku; K Sakuma; H Shiraishi; M Iio; S Nawano

    1988-01-01

    CNS changes in a case of Usher's syndrome associated with schizophrenia-like mental disorder were observed by CT, MRI and PET. The neuro-radiological findings of the case demonstrate the degenerative and metabolic alterations in various regions of cortex, white matter and subcortical areas in the brain. Mental disorder of the case is almost indistinguishable from that of schizophrenia, but the psychotic

  11. Synchronous mucinous tumors of the ovary and the appendix associated with pseudomyxoma peritonei: CT findings

    Microsoft Academic Search

    R. Zissin; G. Gayer; A. Fishman; E. Edelstein; M. Shapiro-Feinberg

    2000-01-01

    Background: To present the computed tomographic (CT) findings of synchronous mucinous tumors of the ovary and the appendix associated\\u000a with pseudomyxoma peritonei (PMP).\\u000a \\u000a \\u000a \\u000a \\u000a Methods: Imaging studies, mainly abdominal CT scans, of three women aged 49–75 years were reviewed. Attention was directed to the\\u000a ovarian masses, peritoneal seeding, and the presence of an appendiceal mucocele.\\u000a \\u000a \\u000a \\u000a \\u000a Results: The ovarian tumors and the

  12. Misty mesentery: a pictorial review of multidetector-row CT findings.

    PubMed

    Filippone, A; Cianci, R; Di Fabio, F; Storto, M L

    2011-04-01

    The term "misty mesentery" indicates a pathological increase in mesenteric fat attenuation at computed tomography (CT). It is frequently observed on multidetector CT (MDCT) scans performed during daily clinical practice and may be caused by various pathological conditions, including oedema, inflammation, haemorrhage, neoplastic infiltration or sclerosing mesenteritis. In patients suffering from acute abdominal disease, misty mesentery may be considered a feature of the underlying disease. Otherwise, it may represent an incidental finding on MDCT performed for other reasons. This article describes the MDCT features of misty mesentery in different diseases in order to provide a rational approach to the differential diagnosis. PMID:21311992

  13. Aorta-Left Renal Vein Fistula Complicating an Aortic Aneurysm: Preoperative and Postoperative Multislice CT Findings

    SciTech Connect

    Barrier, Pierre, E-mail: p.barrier@gmail.com; Otal, Philippe [Hopital de Rangueil CHU de Toulouse, Department of Radiology (France); Garcia, Olivier; Vahdat, Olivier; Domenech, Brice [Clinique Pasteur, Department of Radiology (France); Lannareix, Valerie; Joffre, Francis; Rousseau, Herve [Hopital de Rangueil CHU de Toulouse, Department of Radiology (France)

    2007-06-15

    Fistulas complicating an abdominal aortic aneurysm (AAA) are rare, and fistulas involving the left renal vein are particularly uncommon. We highlight here a fistula between an infrarenal aortic aneurysm and a retroaortic left renal vein, revealed by left flank pain associated with hematuria and acute renal failure. The multislice CT angiography performed in this 68-year-old patient revealed communication and equal enhancement between the aorta and the left gonadic vein, suggesting the presence of a fistula. The three-dimensional VRT reconstructions presented in this case were of great value in the preoperative planning, enabling immediate visualization of this unusual feature. Alternative diagnoses to consider when encountering this clinical presentation are reviewed.

  14. Neurolymphomatosis on F-18 FDG PET/CT and MRI Findings: A Case Report.

    PubMed

    Hong, Chae Moon; Lee, Sang-Woo; Lee, Hong Je; Song, Bong Il; Kim, Hae Won; Kang, Sungmin; Jeong, Shin Young; Ahn, Byeong-Cheol; Lee, Jaetae; Chae, Yee Soo

    2011-03-01

    Neurolymphomatosis is a rare manifestation of malignant lymphoma. A 74-year-old man, in complete remission from diffuse large B cell lymphoma, presented with a loss of pain and temperature sensation in the left hemiface and left upper extremity, and motor weakness in the left upper and both lower extremities. Cerebrospinal fluid analysis and brain magnetic resonance imaging (MRI) findings were negative. Combined fluorine-18 fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) revealed multiple linear hypermetabolic lesions along the mandibular branch of the left trigeminal nerve, left brachial plexus, right axillary nerve, right suprarenal plexus, right adrenal gland, right femoral nerve, and both sciatic nerves, which corresponded to the patient's complex neurologic symptoms. C-spine and pelvic MRI revealed diffuse thickening with enhancement in the left brachial plexus and in the proximal portion of the left sciatic nerve, but negative findings for other sites identified by FDG-PET/CT. These findings suggest that FDG-PET/CT can detect peripheral nerve infiltration by malignant lymphoma earlier than MRI. Thus, if a patient with a history of lymphoma presents with neurologic symptoms, FDG-PET/CT should be performed to evaluate neurolymphomatosis. PMID:24899982

  15. Unusual Malignant Coronary Artery Anomaly: Results of Coronary Angiography, MR Imaging, and Multislice CT

    SciTech Connect

    Apitzsch, Jonas, E-mail: apitzsch@rad.rwth-aachen.d [RWTH Aachen University, Department of Diagnostic Radiology (Germany); Kuehl, Harald P. [RWTH Aachen University, Department of Cardiology (Germany); Muehlenbruch, Georg; Mahnken, Andreas H. [RWTH Aachen University, Department of Diagnostic Radiology (Germany)

    2010-04-15

    We report the case of a man with an uncommon anomaly of the origin and course of the left coronary artery. Clinical, coronary angiography, magnetic resonance imaging, and multislice computed tomography findings of this intermittently symptomatic 49 year-old patient with the rare anomaly of his left coronary artery stemming from the right sinus of Valsalva and taking an interarterial and intraseptal course are presented. The diagnostic value of the different imaging modalities is discussed.

  16. Correlation between dynamic CT findings and pathological prognostic factors of small lung adenocarcinoma

    PubMed Central

    Koike, Wataru; Matsuo, Keiji; Kitano, Mariko; Kawakami, Kenichi; Okada, Tohru; Naganawa, Shinji

    2012-01-01

    Abstract Abstract Purpose: To compare pathological prognostic factors of small lung adenocarcinomas with findings of contrast-enhanced dynamic computed tomography (CT) scans. Materials and methods: We evaluated 108 patients with lung adenocarcinomas???30?mm in diameter who underwent dynamic CT scans (80–96?ml of contrast material, 2.5–3?ml/s injection) and tumor resections. Attenuation values of both the early phase (20–36?s after injection) and delayed phase (91–95?s) of enhanced CT minus baseline plain CT attenuation were defined as ?Early and ?Delay. The early enhancement ratio was defined as ?Early/?Delay×100 (%). We statistically compared the early enhancement ratios between the presence and absence of each pathological finding (lymph node metastasis, lymphatic permeation, vascular invasion, and pleural involvement). Patients were divided into 2 groups based on early enhancement ratios: ratio ?50% (n?=?41) and ratio <50% (n?=?67) and we statistically compared these 2 groups. Results: The early enhancement ratios in the group with lymph node metastasis, lymphatic permeation, and vascular invasion were significantly lower than in the group without these findings (24.9% vs 48.6%; P?CT and the pathological prognostic factors in small lung adenocarcinomas. PMID:22752199

  17. Computed Tomography Findings of an Unusual Maxillary Sinus Mass: Brown Tumor Due to Tertiary Hyperparathyroidism

    PubMed Central

    Altay, Canan; Erdo?an, Nezahat; Eren, Erdem; Altay, Sedat; Karasu, ?ebnem; Uluç, Engin

    2013-01-01

    Brown tumor is a non-neoplastic bone lesion that develops secondary to hyperparathyroidism and it is very rare in the maxillofacial region. We report the case of a 59-year-old man who presented with pain and a swelling in the left cheek. Computed tomography (CT) demonstrated an expansile and radioluscent lesion in the left maxillary sinus. Incisional biopsy was performed, and the diagnosis was Brown tumor. Brown tumor must be considered in the differential diagnosis of expansile lesions of maxillary sinus. PMID:24404414

  18. Imaging of mucocoele of the appendix with emphasis on the CT findings: A report of 10 cases

    Microsoft Academic Search

    Rivka Zissin; Gabriela Gayer; Eugeni Kots; Sara Apter; Meir Peri; Myra Shapiro-Feinberg

    1999-01-01

    AIM: Mucocoele of the appendix denotes an obstructive dilatation of the appendiceal lumen due to abnormal accumulation of mucus. It is sometimes associated with pseudomyxoma peritonei, which predicts a malignant origin. We present the CT findings and additional imaging studies of 10 patients with neoplastic appendiceal mucocoele and discuss the clinical implications.MATERIALS AND METHODS: Abdominal CT findings from 10 patients

  19. Small bowel obstruction due to phytobezoar formation within meckel diverticulum: CT findings

    SciTech Connect

    Frazzini, V.I. Jr.; English, W.J.; Bashist, B.; Moore, E. [Columbia Univ. College of Physicians and Surgeons, New York, NY (United States)] [Columbia Univ. College of Physicians and Surgeons, New York, NY (United States)

    1996-05-01

    Intestinal obstruction due to a phytobezoar within a Meckel diverticulum is exceedingly rare, with only seven reported cases in the surgical literature. The most important precipitating factor is the ingestion of agents high in fiber and cellulose. Small bowel obstruction in all but one case was due to retrograde propagation of the bezoar into the small bowel lumen. We report the clinical and CT findings in such a patient following a vegetarian diet. 14 refs., 2 figs.

  20. Erlotinib-Induced Cutaneous Toxicity: Findings on 18F-FDG PET/CT Imaging.

    PubMed

    Kumar, Kunal; Singh, Harmandeep; Gupta, Ravi Kant; Bal, Chandrasekhar; Kumar, Rakesh

    2015-04-01

    Erlotinib is a reversible epidermal growth factor receptor tyrosine kinase inhibitor used to treat advanced non-small cell lung carcinoma patients who have shown progression on at least 1 prior chemotherapy regimen. Most of the patients on erlotinib show cutaneous adverse effects. We report the F-FDG PET/CT findings in a case of metastatic non-small cell lung carcinoma on erlotinib chemotherapy with developed skin toxicity. PMID:25275420

  1. CT and MR findings of Krukenberg tumors: Comparison with primary ovarian tumors

    SciTech Connect

    Kim, Seung Hyup; Kim, Won Hong; Park, Kyung Joo [Seoul National Univ. (Korea, Republic of)] [Seoul National Univ. (Korea, Republic of)

    1996-05-01

    The purposes of this study were to evaluate the CT and MR findings of Krukenberg tumors and to compare them with those of primary ovarian tumors. This study included 20 patients with Krukenberg tumors and 65 patients with various primary ovarian tumors. CT/MR/both imaging studies were available in 15/1/4 patients with Krukenberg tumor and 31/10/24 patients with primary ovarian tumors, respectively. Imaging findings of the tumors were categorized into three subgroups: a solid mass with intratumoral cysts, a solid mass without intratumoral cysts, and a predominantly cystic mass. Among 32 Krukenberg tumors (bilateral in 12 patients), 22 were solid masses with intratumoral cysts, in 14 of which the wall of the intratumoral cysts showed apparently strong contrast enhancement on CT and/or MRI. Six Krukenberg tumors were solid masses without intratumoral cysts, and four were predominantly cystic masses. Imaging findings of 88 primary ovarian tumors (bilateral in 23 patients) were 5 solid masses with intratumoral cysts, 27 solid masses without intratumoral cysts, and 56 predominantly cystic masses. None of the five primary ovarian tumors with solid mass with intratumoral cysts demonstrated apparently strong contrast enhancement of the cyst wall. Krukenberg tumor should be suspected when one sees solid ovarian tumors containing well demarcated intratumoral cystic lesions, especially if the walls of those cysts demonstrate apparently strong contrast enhancement. 11 refs., 4 figs., 1 tab.

  2. Visual Assessment of CT Findings in Smokers With Nonobstructed Spirometric Abnormalities in The COPDGene® Study

    PubMed Central

    Kim, Song Soo; Yagihashi, Kunihiro; Stinson, Douglas S.; Zach, Jordan A.; McKenzie, Alexander S.; Curran-Everett, Douglas; Wan, Emily S.; Silverman, Edwin K.; Crapo, James D.; Lynch, David A.

    2014-01-01

    Within the COPD Genetic Epidemiology (COPDGene®) study population of cigarette smokers, 9% were found to be unclassifiable by the Global Initiative for chronic Obstructive Lung Disease (GOLD) criteria. This study was to identify the differences in computed tomography (CT) findings between this nonobstructed (GOLDU) group and a control group of smokers with normal lung function. This research was approved by the institutional review board of each institution. CT images of 400 participants in the COPDGene® study (200 GOLDU, 200 smokers with normal lung function) were retrospectively evaluated in a blinded fashion. Visual CT assessment included lobar analysis of emphysema (type, extent), presence of paraseptal emphysema, airway wall thickening, expiratory air trapping, centrilobular nodules, atelectasis, non-fibrotic and fibrotic interstitial lung disease (ILD), pleural thickening, diaphragmatic eventration, vertebral body changes and internal thoracic diameters (in mm). Univariate comparisons of groups for each CT parameter and multiple logistic regression were performed to determine the imaging features associated with GOLDU. When compared with the control group, GOLDU participants had a significantly higher prevalence of unilateral diaphragm eventration (30% vs. 16%), airway wall thickening, centrilobular nodules, reticular abnormality, paraseptal emphysema (33% vs. 17%), linear atelectasis (60% vs. 35.6%), kyphosis (12% vs. 4%), and a smaller internal transverse thoracic diameter (255 ± 22.5 [standard deviation] vs. 264.8 ± 22.4, mm) (all p<0.05). With multiple logistic regression, all of these CT parameters, except non-fibrotic ILD and kyphosis, remained significantly associated with GOLDU status (p<0.05). In cigarette smokers, chest wall abnormalities and parenchymal lung disease, which contribute to restrictive physiologic impairment, are associated with GOLD-nonobstructed status. PMID:25197723

  3. Spiral CT and endoscopic findings in a case of tracheobronchopathia osteochondroplastica.

    PubMed

    Mariotta, S; Pallone, G; Pedicelli, G; Bisetti, A

    1997-01-01

    The following is a report of CT and bronchoscopic findings in a 58-year-old man, a miner for approximately 30 years and suffering from pulmonary silicosis, admitted for a restaging of his lung disease. CT scans showed thickening of the interstitial structures and revealed a distorted trachea, with changes of its caliber, because of nodules of calcific density in the internal mucosa, clearly separated from the cartilaginous rings. The patient underwent fiberoptic bronchoscopy, confirming the presence of numerous nodules on the anterior and lateral walls, sparing the pars membranacea. Brushing and biopsies revealed a squamous metaplasia. 99mTc bone scintigraphy showed no abnormal mediastinal uptake. The radiological and endoscopic picture was compatible with the diagnosis of tracheobronchopathia osteochondroplastica. PMID:9135651

  4. Multiphasic contrast-enhanced CT and MRI findings of adult mesoblastic nephroma: A report of two cases

    PubMed Central

    Ding, Yuqin; He, Deming; Zhou, Jianjun; Zeng, Mengsu

    2013-01-01

    Mesoblastic nephroma (MN) presenting in an adult is extremely rare. The computed tomography (CT) and magnetic resonance imaging (MRI) features of this tumor in adulthood have not been widely reported. We present two additional cases of adult MN and describe the multiphasic contrast-enhanced CT and MRI findings. PMID:23986620

  5. Cardiac CT Angiography After Coronary Bypass Surgery: Prevalence of Incidental Findings

    PubMed Central

    Mueller, Jeffrey; Jeudy, Jean; Poston, Robert

    2014-01-01

    OBJECTIVE Cardiac CT angiography (CTA) is commonly performed after coronary artery bypass grafting surgery (CABG) to assess graft patency, but the images also include parts of the lungs, abdomen, and mediastinum. The purpose of our study was to retrospectively assess the prevalence of unsuspected disease identified on cardiac CTA examinations after CABG and to determine their potential clinical significance. MATERIALS AND METHODS CTA was performed postoperatively in 259 patients (mean, 5.2 days), and 40 patients underwent a follow-up CT scan (mean, 12.7 months). Cardiac CTA was acquired using a 16-MDCT scanner with ECG-gating and bolus timing with a small field of view centered on the heart. Two thoracic radiologists assessed each examination in consensus. The prevalence of graft disease and incidental findings (cardiac and noncardiac) was established. The electronic medical record was reviewed. A finding was judged potentially significant if a therapeutic intervention or radiologic follow-up was deemed advisable on the basis of the cardiac CTA. Bypass graft occlusions were analyzed separately. RESULTS In the immediate postoperative period, 51 patients (19.7%) had at least one unsuspected, potentially significant finding. Twenty-four patients (9.3%) had a cardiac finding such as a ventricular pseudoaneurysm, ventricular perfusion deficit, or intracardiac thrombus, and 34 patients (13.1%) had a noncardiac finding including pulmonary embolism, lung cancer, or pneumonia. At least one bypass graft was occluded in 17 patients (6.6%) in the immediate postoperative period. In the later postoperative period, seven patients (17.5%) had a potentially significant unsuspected finding. Four patients (10.0%) had at least one graft occlusion. CONCLUSION Cardiac CTA after CABG revealed a high prevalence of unsuspected cardiac and noncardiac findings with potential clinical significance. Interpreters of these studies should be familiar with the spectrum of these abnormalities. PMID:17646469

  6. High-Resolution CT Findings of Bronchiolitis Obliterans Syndrome after Hematopoietic Stem Cell Transplantation

    PubMed Central

    Gunn, Martin L. D.; Godwin, J. David; Kanne, Jeffrey P.; Flowers, Mary E.; Chien, Jason W.

    2008-01-01

    PURPOSE To describe the HRCT findings occurring in bronchiolitis obliterans syndrome following hematopoietic stem cell transplantation and to determine the relationship between pulmonary function tests and air-trapping detected on expiratory CT. MATERIALS AND METHODS The HRCT scans of 33 patients who underwent hematopoietic stem cell transplantation and subsequently developed bronchiolitis obliterans syndrome were evaluated by two observers blinded to pulmonary function test results. Scans were ranked for degree of air-trapping and scored for findings of bronchial wall thickening, bronchiectasis, and centrilobular opacities. Air-trapping rank was correlated with the degree of airflow obstruction as determined by pulmonary function tests. RESULTS The ranking of air-trapping correlated significantly with FEV1 (p=0.001), FEV1/FVC (p<0.001), RV (p<0.001), DLCO (p=0.023), but not FVC (p=0.14) or TLC (p=0.07). Bronchial wall thickening occurred in 73.0%, predominantly in lower lobes (p=0.007), but was mild. Bronchiectasis occurred in 42.4% and centrilobular opacities in 39.4%. CONCLUSION In bronchiolitis obliterans syndrome developing after hematopoietic stem cell transplantation, air-trapping is the principal finding on CT, and its severity correlates with pulmonary function tests. Bronchial wall thickening is common, but almost always mild; bronchiectasis and centrilobular opacities occur in less than half of cases and are also mild. PMID:19204468

  7. Comparison of pulmonary thin section CT findings and serum KL-6 levels in patients with sarcoidosis

    PubMed Central

    Honda, K; Okada, F; Ando, Y; Mori, H; Umeki, K; Ishii, H; Kadota, J; Ando, M; Miyazaki, E; Kumamoto, T

    2011-01-01

    Objective This study aimed to compare thin-section CT images from sarcoidosis patients who had either normal or elevated serum KL-6 levels. Methods 101 patients with sarcoidosis who underwent thin-section CT examinations of the chest and serum KL-6 measurements between December 2003 and November 2008 were retrospectively identified. The study group comprised 75 sarcoidosis patients (23 male, 52 female; aged 19–82 years, mean 54.1 years) with normal KL-6 levels (152–499 U ml–1, mean 305.7 U ml–1) and 26 sarcoidosis patients (7 male, 19 female; aged 19–75 years, mean 54.3 years) with elevated KL-6 levels (541–2940 U ml–1, mean 802.4 U ml–1). Two chest radiologists, unaware of KL-6 levels, retrospectively and independently interpreted CT images for parenchymal abnormalities, enlarged lymph nodes and pleural effusion. Results CT findings in sarcoidosis patients consisted mainly of lymph node enlargement (70/75 with normal KL-6 levels and 21/26 with elevated KL-6 levels), followed by nodules (50 and 25 with normal and elevated levels, respectively) and bronchial wall thickening (25 and 21 with normal and elevated levels, respectively). Ground-glass opacity, nodules, interlobular septal thickening, traction bronchiectasis, architectural distortion and bronchial wall thickening were significantly more frequent in patients with elevated KL-6 levels than those with normal levels (p<0.001, p<0.005, p<0.001, p<0.001, p<0.001 and p<0.001, respectively). By comparison, there was no significant difference in frequency of lymph node enlargement between the two groups. Conclusion These results suggest that serum KL-6 levels may be a useful marker for indicating the severity of parenchymal sarcoidosis. PMID:21045068

  8. Giant cell interstitial pneumonia: an unusual finding in a case of preoperative death.

    PubMed

    Sisodia, Shantilal M; Bendale, Kiran; Khan, Wasif Ali Zafarali; Sanklecha, Vandana

    2013-06-01

    Giant cell interstitial pneumonia (GIP) is an exceedingly rare, debatable, perplexing, occupational lung disease, which most commonly affects individuals exposed to hard metal dust. We report a case of GIP in a 60-year-old man, scheduled for coronary artery bypass graft surgery and died during induction of general anesthesia despite all efforts to resuscitate him. Patient's relatives lodged complaint with the police alleging the negligence by the attending physicians. Despite inaccessible data pertaining to the occupation, clinical history, and radiographic findings, the diagnosis was GIP due to the presence of intra-alveolar, bizarre, "cannibalistic" multinucleated giant cells-the histologic sine qua non of GIP. To the best of our knowledge, this is the first case report of GIP in the world literature that was diagnosed on histopathologic examination of lung tissue obtained at medicolegal autopsy. PMID:23629398

  9. Allergic alveolitis caused by home humidifiers. Unusual clinical features and electron microscopic findings.

    PubMed

    Burke, G W; Carrington, C B; Strauss, R; Fink, J N; Gaensler, E A

    1977-12-19

    Allergic alveolitis (hypersensitivity pneumonitis) developed in two patients who were exposed to home humidifiers contaminated by thermophilic actinomycetes. Diagnosis was difficult because severe dyspnea was chronic and not easily associated with specific environmental exposure. Furthermore, chest roentgenograms were normal for long periods despite severe physiologic abnormalities. After several years of disabling symptoms, open lung biopsy findings suggested allergic alveolitis rather than sarcoidosis because a mononuclear interstitial infiltrate overshadowed the granulomas. Also, plasma cells were prominent and there was an intense bronchiolitis. Cultures of the humidifier water grew thermophilic organisms to which the patient's sera formed precipitins. Both patients experienced notable subjective and objective improvement following removal of the contaminated appliances. The ultrastructure of alveolar macrophages and basement membranes was similar to that described in animal models, suggesting cell-mediated hypersensitivity in the patients. PMID:579209

  10. Unusual Larva in the CSF and Unique MRI Findings in a Case of Eosinophilic Meningitis

    PubMed Central

    Rai, Santosh; Madi, Deepak; Pai, Shivanand; Baliga, Shrikala

    2014-01-01

    Eosinophilic meningitis may be caused by non-infectious and infectious agents. Angiostrongylus cantonensis is the commonest causative agent of eosinophilic meningitis. Rats are the primary hosts of this parasite. Humans get infected by ingestion of raw or inadequately cooked hosts (snails or monitor lizard) or food contaminated with the infective third-stage larvae. A 16-year-old boy was admitted to our hospital with history of fever, headache, and altered sensorium. Magnetic resonance imaging of the brain showed unique findings. Cerebrospinal fluid (CSF) examination showed eosinophilia and the CSF wet mount identified a larva. Patient history revealed ingestion of monitor lizard 2 weeks prior to onset of symptoms. Hence, a diagnosis of eosinophilic meningitis caused by A. cantonensis was made. He was treated with oral albendazole and steroids, resulting in gradual improvement. A. cantonensis as a cause of eosinophilic meningitis is a possibility in patients who present with headache and vomiting after eating raw meat (monitor lizard). To the best of our knowledge, this is a very rare case being reported from India where the larva was identified during the microscopic examination of the CSF.

  11. Contrast enhanced multi-detector CT and MR findings of a well-differentiated pancreatic vipoma

    PubMed Central

    Camera, Luigi; Severino, Rosa; Faggiano, Antongiulio; Masone, Stefania; Mansueto, Gelsomina; Maurea, Simone; Fonti, Rosa; Salvatore, Marco

    2014-01-01

    Pancreatic vipoma is an extremely rare tumor accounting for less than 2% of endocrine pancreatic neoplasms with a reported incidence of 0.1-0.6 per million. While cross-sectional imaging findings are usually not specific, exact localization of the tumor by means of either computed tomography (CT) or magnetic resonance (MR) is pivotal for surgical planning. However, cross-sectional imaging findings are usually not specific and further characterization of the tumor may only be achieved by somatostatin-receptor scintigraphy (SRS). We report the case of a 70 years old female with a two years history of watery diarrhoea who was found to have a solid, inhomogeneously enhancing lesion at the level of the pancreatic tail at Gadolinium-enhanced MR (Somatom Trio 3T, Siemens, Germany). The tumor had been prospectively overlooked at a contrast-enhanced multi-detector CT (Aquilion 64, Toshiba, Japan) performed after i.v. bolus injection of only 100 cc of iodinated non ionic contrast media because of a chronic renal failure (3.4 mg/mL) but it was subsequently confirmed by SRS. The patient first underwent a successful symptomatic treatment with somatostatin analogues and was then submitted to a distal pancreasectomy with splenectomy to remove a capsulated whitish tumor which turned out to be a well-differentiated vipoma at histological and immuno-histochemical analysis. PMID:25349667

  12. Gorlin-Goltz syndrome: incidental finding on routine ct scan following car accident

    PubMed Central

    2009-01-01

    Introduction Gorlin-Goltz syndrome is a rare hereditary disease. Pathogenesis of the syndrome is attributed to abnormalities in the long arm of chromosome 9 (q22.3-q31) and loss or mutations of human patched gene (PTCH1 gene). Multiple basal cell carcinomas (BCCs), odontogenic keratocysts, skeletal abnormalities, hyperkeratosis of palms and soles, intracranial ectopic calcifications of the falx cerebri and facial dysmorphism are considered the main clinical features. Diagnosis is based upon established major and minor clinical and radiological criteria and ideally confirmed by DNA analysis. Because of the different systems affected, a multidisciplinary approach team of various experts is required for a successful management. Case presentation We report the case of a 19 year-old female who was involved in a car accident and found to present imaging findings of Gorlin-Goltz syndrome during a routine whole body computed tomography (CT) scan in order to exclude traumatic injuries. Conclusion Radiologic findings of the syndrome are easily identifiable on CT scans and may prompt to early verification of the disease, which is very important for regular follow-up and better survival rates from the co-existent diseases. PMID:20062724

  13. Electrocardiography in conscious releasable Andean condors (Vultur gryphus): reference panel and unusual findings.

    PubMed

    Wiemeyer, Guillermo M; Lambertucci, Sergio A; Bianchini, Laura Torres; Belerenian, Guillermo

    2013-01-01

    Electrocardiography is a useful tool when included in healthcare protocols and is increasingly utilized for monitoring wild birds. However, the lack of reference data for many species is limiting the clinical value of this technique. In this study 26 Andean condors (Vultur gryphus) coming from rehabilitation and captive breeding programs were examined to determine electrocardiographic references prior to being released. Standard bipolar (I, II, and III) and augmented unipolar limb (aVR, aVL, and aVF) leads were recorded with birds under physical restraint. Five beats were analyzed on Lead II at 50?mm/sec and 1?cm?=?1?mV to determine QRS complex morphology, cardiac rhythm, heart rate, P, PR, R, S, QRS, T, QT, and ST amplitude and/or duration. P and T wave configuration was determined for all leads, and Mean Electrical Axis (MEA) in the frontal plane was determined using leads I and III. Cardiac rhythm corresponded to regular sinus rhythm in 42% of the birds, with a relevant rate of sinus arrhythmia in 58%, and rS as the most common pattern (42%) for QRS complex in lead II. We found an influence of age and heart rate but not of sex on several ECG waves and intervals. Relevant ECG findings for studied Andean condors include a high rate of T(a), R', and U wave detection. Waves T(a) and R' were considered non-pathological, while the significance of U waves remains unclear. Our results provide a useful reference to improve clinical interpretation of full electrocardiographic examination in Andean condors. PMID:23386535

  14. Bilateral alien hand syndrome in cerebrovascular disease: CT, MR, CT angiography, and 99mTc-HMPAO-SPECT findings.

    PubMed

    Serrano-Vicente, Justo; Duran-Barquero, Carmen; Garcia-Bernardo, Lucia; Dominguez-Grande, Maria Luz; Infante-Torre, Jose Rafael; Rayo-Madrid, Juan Ignacio

    2015-03-01

    We report a 65-year-old man with a right cerebral infarction that occurred 15 years ago and a residual left hemiparesis that began with progressive contralateral hemiparesis. During the hospitalization, the patient developed a bilateral alien hand syndrome. Urgent CT, MR, CT angiography, and brain perfusion SPECT were performed that revealed an old right cerebral infarction and a new ischemic lesion in left parietal lobe and adjacent brain territories. PMID:25546190

  15. Unusual 131Iodine Uptake in a Joint Demonstrated by SPECT/CT in a Patient With Differentiated Thyroid Cancer.

    PubMed

    Ciappuccini, Renaud; Aide, Nicolas; Métayer, Laure; Bardet, Stéphane

    2015-04-01

    An 84-year-old woman was referred for radioiodine ablation 2 months after total thyroidectomy for papillary thyroid cancer. Whole-body scan showed an Iodine focus in the left hand. Iodine uptake persisted after skin decontamination. SPECT/CT revealed focal uptake in the metacarpophalangeal joint of the thumb. Hybrid CT scan and medical history with clinical examination suggested osteoarthritis of the first metacarpophalangeal joint. PMID:25674862

  16. [CT imaging features and their correlation with pathological findings of solid pseudopapillary tumor of pancreas].

    PubMed

    Zheng, Xingju; Tan, Xianzheng; Wu, Bing

    2014-02-01

    To analyze the CT features of solid pseudopapillary tumor of pancreas (SPTP), and correlation with the pathological findings of the disease so as to improve the diagnostic abilities, the CT images and the clinical manifestations, we retrospectively analyzed the pathological materials of 23 cases with surgery and pathology proved SPTP. In the 23 patients, 21 cases were female (91.3%) and 2 were male (8.7%). The most common symptom was abdominal discomfort with dull pain in 12 patients (52.2%). Others included the pancreatic mass that was detected incidentally during physical examination in 9 patients (39.1%), nausea/vomiting in 2 patients (8.7%). And 1 case of female patients had 2 lesions. In the 24 tumors, 6 cases were located at the head (25.0%), 3 were at neck (12.5%), 8 cases were at body (33.3%), and 7 cases were at tail of pancreas respectively (29.2%). The long-axis diameter ranged from 2.1 cm to 20.1 cm (mean 6.4 cm). 9 tumors were mostly solid component (37.5%), 10 tumors were contained similar proportion of solid and cystic part (41.7%), and mainly cystic components in 5 tumors (20.8%). In 9 of the 23 patients, calcification was found in the tumor (39.1%). In 2 of the 23 patients, bleeding was seen in the mass (8.7%). The dilation of intrahepatic bile duct was found in 1 patient (8.7%). Liver metastasis was showed in one patient (8.7%). On post-contrast CT scan, solid parts demonstrated mild enhancement at the arterial phase. At the portal phase, solid parts were enhanced continuously in all cases, and the enhancement degrees were lower than normal pancreatic tissue. The cystic parts of all lesions showed no enhancement. Pseudo papillary structure, hemorrhage, necrosis, or cystic degeneration were found in all patients by histological study. In a word, SPTP has comparatively characteristic CT imaging features consistent with histological features, when combined with clinical manifestations, could be correctly diagnosed and differentially diagnosed. PMID:24804494

  17. Reformed gallbladder after laparoscopic subtotal cholecystectomy: correlation of surgical findings with ultrasound and CT imaging†

    PubMed Central

    Di Sano, Suzanne J.; Bull, Nicholas B.

    2015-01-01

    Laparoscopic subtotal cholecystectomy is a technique that is becoming increasingly prevalent in modern surgery. It avoids the cystic duct and artery where acute or chronic cholecystitis prevents a safe laparoscopic dissection of these structures. There are numerous reports of symptomatic cystic duct remnants after subtotal cholecystectomy in the literature on post-cholecystectomy syndrome. We present a case report of a 62-year-old man who underwent emergent laparoscopic subtotal cholecystectomy complicated by the development of a persistent, controlled bile leak. This was followed on serial ultrasound examinations and managed with multiple drain insertions and endoscopic retrograde cholangiopancreatography. The patient represented 4 months later with right upper quadrant pain and was found to have an apparently normal gallbladder on CT abdomen. Repeat laparoscopic cholecystectomy demonstrated a reformed gallbladder wall and was completed in the standard fashion. This case demonstrates an unexpected complication of laparoscopic cholecystectomy with correlation of radiological and surgical findings. PMID:25650389

  18. Three-Dimensional CT Findings of Os Calcaneus Secundarius Mimicking a Fracture

    PubMed Central

    Bulut, Mehmet Deniz; Bora, Ayd?n; Gökalp, Mehmet Ata; Özkaçmaz, Sercan; Batur, Abdussamet

    2014-01-01

    Os calcaneus secundarius is one of several accessory ossicles of the foot that have been identified as normal variants of skeletal development. It may cause ankle pain and may mimic an avulsion fracture of the anterior calcaneal process. A twenty-year-old male was admitted to our institution with right ankle pain following an inversion injury. An axial CT image of the patient's right ankle revealed a shape with smooth and sharp margins, identified as a well-corticated bone fragment in the subtalar region. A diagnosis of an accessory ossicle, os calcaneus secundarius, was made based on radiographic findings. As a result of this case, it is recommended that potential locations of the accessory bones should be well understood in order to prevent misdiagnosis and inappropriate surgical procedures. Os calcaneus secundarius must be considered when an apparent bone fragment or a suspicious fracture line at the anterior region of os calcaneus is demonstrated. PMID:25610694

  19. Reformed gallbladder after laparoscopic subtotal cholecystectomy: correlation of surgical findings with ultrasound and CT imaging†.

    PubMed

    Di Sano, Suzanne J; Bull, Nicholas B

    2015-01-01

    Laparoscopic subtotal cholecystectomy is a technique that is becoming increasingly prevalent in modern surgery. It avoids the cystic duct and artery where acute or chronic cholecystitis prevents a safe laparoscopic dissection of these structures. There are numerous reports of symptomatic cystic duct remnants after subtotal cholecystectomy in the literature on post-cholecystectomy syndrome. We present a case report of a 62-year-old man who underwent emergent laparoscopic subtotal cholecystectomy complicated by the development of a persistent, controlled bile leak. This was followed on serial ultrasound examinations and managed with multiple drain insertions and endoscopic retrograde cholangiopancreatography. The patient represented 4 months later with right upper quadrant pain and was found to have an apparently normal gallbladder on CT abdomen. Repeat laparoscopic cholecystectomy demonstrated a reformed gallbladder wall and was completed in the standard fashion. This case demonstrates an unexpected complication of laparoscopic cholecystectomy with correlation of radiological and surgical findings. PMID:25650389

  20. CT detection of facial canal dehiscence and semicircular canal fistula: Comparison with surgical findings

    SciTech Connect

    Fuse, Takeo; Tada, Yuichiro; Aoyagi, Masaru; Sugai, Yukio [Yamagata Univ. School of Medicine (Japan)] [Yamagata Univ. School of Medicine (Japan)

    1996-03-01

    The purpose of this study was to determine the accuracy of high resolution CT (HRCT) in the detection of facial canal dehiscence and semicircular canal fistula, the preoperative evaluation of both of which is clinically very important for ear surgery. We retrospectively reviewed the HRCT findings in 61 patients who underwent mastoidectomy at Yamagata University between 1989 and 1993. The HRCT images were obtained in the axial and semicoronal planes using 1 mm slice thickness and 1 mm intersection gap. In 46 (75%) of the 61 patients, the HRCT image-based assessment of the facial canal dehiscence coincided with the surgical findings. The data for the facial canal revealed sensitivity of 66% and specificity of 84%. For semicircular canal fistula. in 59 (97%) of the 61 patients, the HRCT image-based assessment and the surgical findings coincided. The image-based assessment in the remaining two patients, who both had massive cholesteatoma, was false-positive. HRCT is useful in the diagnosis of facial canal dehiscence and labyrinthine fistula, but its limitations should also be recognized. 12 refs., 3 figs., 6 tabs.

  1. Comparison of clinical findings between intensity-windowed versus CLAHE presentations of chest CT images

    NASA Astrophysics Data System (ADS)

    Hemminger, Bradley M.; Johnston, Richard E.; Muller, Keith E.; Taylor, D.; Mauro, J. Matthew; Schiebler, M.; Pisano, Etta D.

    1992-05-01

    We are investigating how radiologists's readings of standard intensity windowed (IW) chest computed tomography (CT) films compare with readings of the same images processed with contrast limited adaptive histogram equalization (CLAHE). Previously reported studies where CLAHE has been tested have involved detection of computer generated targets in medical images. Our study is designed to evaluate CLAHE when applied to clinical material and to compare the diagnostic information perceived by the radiologists from CLAHE processed images to that from the conventional IW images. Our initial experiment with two radiologists did not yield conclusive results, due in part, to inadequate observer training prior to the experiment. The initial experimental protocol was redesigned to include more in-depth training. Three new radiologist observers were recruited for the follow-up study. Results from the initial study are reviewed and the follow-up study is presented. In the new study we find that while CLAHE and IW are not statistically significantly different overall, there are specific clinical findings where the radiologists were less comfortable reading CLAHE presentations. Advantages and disadvantages of using CLAHE as a replacement or as an adjunct to IW are discussed.

  2. Unusual association of alveolar rhabdomyosarcoma with pancreatic metastasis: emerging role of PET-CT in tumor staging

    PubMed Central

    Jha, Priyanka; Frölich, Andreas M. J.; McCarville, Beth; Navarro, Oscar M.; Babyn, Paul; Goldsby, Robert

    2010-01-01

    Background Pancreatic metastases in childhood cancer have been rarely reported in the radiology literature although ample evidence exists in pathology reports for its occurrence in patients with alveolar rhabdomyosarcomas (RMS). Objective Assess the occurrence of pancreatic metastases in alveolar rhabdomyosarcomas, increase awareness of this association and reassess current staging protocols. Materials and methods Three major oncology centers reviewed their records and imaging examinations. Patients’ history and demographics, primary tumor site and histology, presence of tumor recurrence, and presence and location of other metastases were reviewed. Results Pancreatic metastases occurred in eight patients with alveolar RMS. Four of these presented at diagnosis and four with disease recurrence. In recurrent disease, the duration between the diagnosis of the primary tumor and pancreatic metastases varied from 8 months to 6 years (mean?±?SD: 2.38?±?2.49 years). In all patients who received PET scans, pancreatic metastases showed a marked FDG-uptake, but had variable detectability with CT. Pancreatic metastases were not associated with certain primary tumor locations or presence of other metastases, mandating an evaluation of the pancreas in all cases of alveolar rhabdomyosarcomas. Conclusion Radiologists should be sensitized and actively evaluate the pancreas in patients with alveolar RMS. Optimizing CT and PET-CT protocols may increase the diagnostic yield. PMID:20180103

  3. Monitoring the response of lymphoma patients to therapy: correlation of abdominal CT findings with clinical course and histologic cell type

    SciTech Connect

    Oliver, T.W. Jr.; Bernardino, M.E.; Sones, P.J. Jr.

    1983-10-01

    A review was made of 365 abdominal computed tomographic (CT) examinations in 125 patients with a histologic diagnosis of lymphoma who had undergone CT before and after therapy. Clinical correlation immediately preceding the follow-up CT examination was obtained in 100 patients. In these 100 patients, five distinct subgroups emerged: (a) reduction in extent of disease without changes in internal nodal characteristics; (b) reduction in extent of disease with change in internal nodal characteristics; (c) no change in extent of disease and no change in internal nodal characteristics; (d) no change in extent of disease but change in internal nodal charateristics; and (e) disease progression. Changes in internal nodal architecture consisted of diminished attenuation or mesenteric stranding. A 91% correlation existed between the CT findings and the clinical course. Of those patients with a worsening clinical course, and follow-up CT studies suggesting a stable or improved response to therapy, relapse in the majority (57%) involved the central nervous system. The authors conclude that limited abdominal CT examination is satisfactory in the posttherapy follow-up of lymphoma patients.

  4. CT Findings in Bronchiectasis: Limited Value in Distinguishing Between Idiopathic and Specific Types

    Microsoft Academic Search

    Daniel B. Reiff; Athol U. Wells; Denis H. Carr; Peter J. Cole; David M. Hansell

    OBJECTIVE. The purpose of this study was to determine whether the pattern and distribution of bronchiectasis shown on CT scans can be used to discriminate between idiopathic cases and those with an identifiable cause. MATERIALS AND METHODS. The CT scans of 168 patients with chronic purulent sputum production and who were suspected of having bronchiectasis were analyzed (117 patients with

  5. Burkitt's Lymphoma Presented as Advanced Ovarian Cancer without Evidence of Lymphadenopathy: CT and MRI Findings

    PubMed Central

    Manganaro, Lucia; Bernardo, Silvia; Sergi, Maria Eleonora; Sollazzo, Paolo; Vinci, Valeria; De Grazia, Alessandra; Clerico, Anna; Mollace, Maria Giovanna; Saldari, Matteo

    2013-01-01

    Burkitt's lymphoma is a rare non-Hodgkin's lymphoma which can occasionally involve the ovary and may cause confusion for the clinician since its presentation might mimic other much more frequent tumors. We present a case of a 23-year-old woman with sporadic Burkitt's lymphoma presented as advanced ovarian cancer with bilateral ovarian masses, peritoneal carcinomatosis, ascites, and marked elevation of CA-125. Liver involvement and atypical bone lesions, such as the cranial vault and the iliac wing, were also detected without evidence of lymphadenopathy. We describe the MRI and CT findings of simultaneous ovarian and bone lesions, which have never been reported in literature in a patient with Burkitt's lymphoma, before and after one cycle of chemotherapy. In evaluating any ovarian neoplasm in a young woman, Burkitt's lymphoma should be considered as a possibility, particularly if associated with bone lesions. MRI is the most useful tool to characterize the ovarian lesions and suggest the diagnosis before the histopathological results. PMID:23607034

  6. An Unusual Case of Extraosseous Accumulation of Bone Scan Tracer in a Renal Calculus - Demonstration by SPECT-CT.

    PubMed

    Joshi, Prathamesh Vijay; Lele, Vikram; Gandhi, Rozil

    2012-01-01

    Extraosseous localization of radioisotope, used in bone scan, in a variety of physiological and pathological conditions is a well-known phenomenon. The causes of extraosseous accumulation of bone-seeking radiotracers should be kept in mind when bone-imaging studies are reviewed to avoid incorrect interpretations. We report an extremely rare occurrence of extraosseous accumulation of bone scintigraphy tracer in a renal calculus, in a patient with adenocarcinoma of prostate, that was demonstrated by Single Photon Emission Computed Tomography and Computed Tomography (SPECT-CT) fusion imaging. PMID:22439128

  7. UNUSUAL FINDINGS IN ZEBRAFISH, DANIO RERIO, FROM TOXICOLOGICAL STUDIES AND THE ZEBRAFISH INTERNATIONAL RESOURCE CENTER DIAGNOSTIC SERVICE

    EPA Science Inventory

    A number of interesting and unusual lesions have been diagnosed in zebrafish that have been evaluated from toxicological studies or submitted as cases to the Diagnostic Service at Oregon State University. Lesions were observed in various wild-type and mutant lines of zebrafish an...

  8. Findings of hepatopulmonary syndrome on breath-hold perfusion SPECT-CT fusion images

    Microsoft Academic Search

    Kazuyoshi Suga; Yasuhiko Kawakami; Hideyuki Iwanaga; Osamu Tokuda; Naofumi Matsunaga

    2009-01-01

    Pulmonary perfusion SPECT-CT fusion images were used to characterize CT manifestations of intrapulmonary arteriovenous communications\\u000a (AVC) causing right-to-left shunt and hepatopulmonary syndrome (HPS). After scanning the whole body and obtaining multiple\\u000a view images of the lung, deep-inspiratory breath-hold (DIBrH) SPECT was obtained in 2 patients with HPS, which was automatically\\u000a and three-dimensionally co-registered with DIBrH CT. In both patients, the

  9. A case of hemorrhagic pineal cyst: MR\\/CT correlation

    Microsoft Academic Search

    R. E. Osborn; H. G. Deen; C. W. Kerber; R. F. Glass

    1989-01-01

    A 30-year-old male had a headache for one month and was evaluated with both computed tomography (CT) and magnetic resonance (MR). These scans demonstrated an obstructing pineal cyst containing layered acute and subacute blood products by MR criteria. The concurrent scans allowed correlation between CT and MR findings in this rare complication of an unusual entity, explained his headache (and

  10. NIH study finds childhood CT scans linked to leukemia and brain cancer later in life

    Cancer.gov

    Children and young adults scanned multiple times by computed tomography (CT), a commonly used diagnostic tool, have a small increased risk of leukemia and brain tumors in the decade following their first scan.

  11. MR and CT findings in a case of hibernoma of the thigh extending into the pelvis

    Microsoft Academic Search

    T. Mugel; M. A. Ghossain; C. Guinet; J.-N. Buy; J.-P. Bethoux; P. Texier; D. Vadrot

    1998-01-01

    .   Review of the literature shows no report of hibernoma of the thigh extending into the pelvis. Herein we report a case of\\u000a hibernoma which appeared on CT and MR as a well-defined pelvic mass with contrast enhancement extending through the obturator\\u000a foramen into the thigh. Fat was demonstrated by CT, whereas MR, using multiplanar sections, better analyzes the extension

  12. Fat Necrosis of the Breast: A Pictorial Review of the Mammographic, Ultrasound, CT, and MRI Findings with Histopathologic Correlation

    PubMed Central

    Kerridge, William D.; Kryvenko, Oleksandr N.; Thompson, Afua; Shah, Biren A.

    2015-01-01

    Fat necrosis of the breast is a challenging diagnosis due to the various appearances on mammography, ultrasound, CT, PET-CT, and MRI. Although mammography is more specific, ultrasound is a very important tool in making the diagnosis of fat necrosis. MRI has a wide spectrum of findings for fat necrosis and the appearance is the result of the amount of the inflammatory reaction, the amount of liquefied fat, and the degree of fibrosis. While CT and PET-CT are not first line imaging examinations for the diagnosis of breast cancer or fat necrosis, they are frequently performed in the surveillance and staging of disease. Knowledge of how fat necrosis presents on these additional imaging techniques is important to prevent misinterpretation of the imaging findings. Gross and microscopic appearances of fat necrosis depend on the age of the lesion; the histologic examination of fat necrosis is usually straightforward. Knowledge of the variable appearances of fat necrosis on a vast array of imaging modalities will enhance a radiologist's accuracy in the analysis and interpretation of fat necrosis versus other diagnoses. PMID:25861475

  13. The prevalence and clinical importance of incidental soft-tissue findings in cervical CT scans of trauma population

    PubMed Central

    Ergun, T; Lakadamyali, H

    2013-01-01

    Objectives: To define the age-related prevalence of incidental soft-tissue findings in cervical CT scans of a trauma population and to investigate their clinical importance. Methods: The original diagnostic radiology reports and the CT images of the 357 patients with cervical trauma were retrospectively evaluated. Incidental soft-tissue findings were investigated. All findings were grouped according to age. The findings were classified based on their clinical importance into three categories: Category 1: no clinical importance, Category 2: possible clinical importance requiring further investigation and Category 3: obvious clinical importance. In addition, the medical records of the patients were investigated. The follow-up ratio of the pathologies mentioned in the original radiology report was recorded. Results: The most frequently encountered findings in Categories 2 and 3 were carotid artery calcification (n?=?89, 24.9%) and tonsillolith (n?=?115, 32.2%), respectively. The reporting ratio in the original reports of Categories 1, 2 and 3 findings was 1.1% (n?=?4), 9% (n?=?27) and 34.5% (n?=?64), respectively. No further investigations and follow-up was accomplished for Category 1 lesions, whereas 11.1% of Category 2 and 35.9% of Category 3 lesions were subjected to further investigations and follow-up. Conclusions: The cervical CT scans of trauma patients reveal many clinically important soft-tissue incidental findings. Cervical region incidental findings may be followed up on an outpatient basis, rarely being of life-threatening value. The ratio of reporting and follow-up of incidental findings increases parallel to the clinical importance of the lesions. PMID:24141984

  14. Intraorbital Encephalocele Presenting with Exophthalmos and Orbital Dystopia : CT and MRI Findings

    PubMed Central

    Gunduz, Yasemin; Yaldiz, Can; Aksoy, Yakup Ersel

    2015-01-01

    A 15-year-old female patient with progressive pulsatile exophthalmos caused by intraorbital encephalocele was evaluated with computed tomography (CT) and magnetic resonance imaging (MRI) in our clinic. She had no history of trauma or reconstructive surgery. When she was a little girl, she had undergone surgery for congenital glaucoma on the right eye. On the three-dimensional image of CT, a hypoplasic bone defect was observed in the greater wing of the right sphenoid bone. MRI and CT scan showed herniation through this defect of the arachnoid membrane and protruded cerebral tissue into the right orbita. Intraorbital encephalocele is an important entity that can cause pulsatile exophthalmos and blindness. PMID:25674346

  15. Intraorbital Encephalocele Presenting with Exophthalmos and Orbital Dystopia : CT and MRI Findings.

    PubMed

    Asil, Kiyasettin; Gunduz, Yasemin; Yaldiz, Can; Aksoy, Yakup Ersel

    2015-01-01

    A 15-year-old female patient with progressive pulsatile exophthalmos caused by intraorbital encephalocele was evaluated with computed tomography (CT) and magnetic resonance imaging (MRI) in our clinic. She had no history of trauma or reconstructive surgery. When she was a little girl, she had undergone surgery for congenital glaucoma on the right eye. On the three-dimensional image of CT, a hypoplasic bone defect was observed in the greater wing of the right sphenoid bone. MRI and CT scan showed herniation through this defect of the arachnoid membrane and protruded cerebral tissue into the right orbita. Intraorbital encephalocele is an important entity that can cause pulsatile exophthalmos and blindness. PMID:25674346

  16. CT angiography of the celiac trunk: anatomy, variants and pathologic findings.

    PubMed

    Ozbülbül, Nilgün I?iksalan

    2011-06-01

    Celiac trunk variants and pathologies are relatively common occurrences. With the advent of computed tomography (CT) technology, these conditions are being diagnosed with an increased frequency even among asymptomatic patients. CT angiography is used noninvasively for preoperative staging and vascular mapping in patients with pancreatic and hepatobiliary neoplasm. Multidetector-row CT (MDCT) also allows the accurate depiction of the abdominal splanchnic vessels for stenosis, collateral vessels and atherosclerotic plaques. In this study, we describe the normal anatomy and variants of the celiac trunk as well as associated pathologic conditions, such as stenosis, occlusion, aneurysm and median arcuate ligament compression syndrome. The overall aim of this study was to emphasize the clinical importance of these abnormalities. PMID:20690078

  17. A combined pulmonary -radiology workshop for visual evaluation of COPD: study design, chest CT findings and concordance with quantitative evaluation

    PubMed Central

    Lynch, David A; Murphy, James R; Crapo, James D; Criner, Gerard J; Galperin-Aizenberg, Maya; Jacobson, Francine L; Lipson, David A; Mamary, A James; Newell, John D; Sharafkhaneh, Amir; van Beek, Edwin JR

    2013-01-01

    The purposes of this study were: to describe chest CT findings in normal non-smoking controls and cigarette smokers with and without COPD; to compare the prevalence of CT abnormalities with severity of COPD; and to evaluate concordance between visual and quantitative chest CT (QCT) scoring Methods Volumetric inspiratory and expiratory CT scans of 294 subjects, including normal non-smokers, smokers without COPD, and smokers with GOLD Stage I-IV COPD, were scored at a multi-reader workshop using a standardized worksheet. There were fifty-eight observers (33 pulmonologists, 25 radiologists); each scan was scored by 9–11 observers. Interobserver agreement was calculated using kappa statistic. Median score of visual observations was compared with QCT measurements. Results Interobserver agreement was moderate for the presence or absence of emphysema and for the presence of panlobular emphysema; fair for the presence of centrilobular, paraseptal, and bullous emphysema subtypes and for the presence of bronchial wall thickening; and poor for gas trapping, centrilobular nodularity, mosaic attenuation, and bronchial dilation. Agreement was similar for radiologists and pulmonologists. The prevalence on CT readings of most abnormalities (e.g. emphysema, bronchial wall thickening, mosaic attenuation, expiratory gas trapping) increased significantly with greater COPD severity, while the prevalence of centrilobular nodularity decreased. Concordances between visual scoring and quantitative scoring of emphysema, gas trapping and airway wall thickening were 75%, 87% and 65%, respectively. Conclusions Despite substantial inter-observer variation, visual assessment of chest CT scans in cigarette smokers provides information regarding lung disease severity; visual scoring may be complementary to quantitative evaluation. PMID:22429093

  18. Normal variations and benign findings in pediatric 18F-FDG-PET/CT.

    PubMed

    Grant, Frederick D

    2014-04-01

    (18)F-FDG PET and PET/CT have a wide variety of indications in children and young adults. Oncologic indications are the most common, but others include neurology, sports medicine, cardiology, and infection imaging. Accurate interpretation of pediatric (18)F-FDG PET and PET/CT requires a technically adequate study and knowledgeable interpretation of the images. A successful pediatric (18)F-FDG PET requires age-appropriate patient preparation and consideration of patient age and developmental stage. Accurate interpretation of the study requires familiarity with normal patterns of physiologic (18)F-FDG uptake in children at all stages of development. PMID:25030282

  19. CT and MRI Findings of Hepatic Involvement in Rendu-Osler-Weber Disease

    PubMed Central

    Bilgin, Mehmet; Yildiz, Seyma; Toprak, Huseyin; Ahmad, Issam Cheikh; Kocakoc, Ercan

    2012-01-01

    Rendu-Osler-Weber disease is a rare autosomal dominant disorder. Hepatic involvement manifests itself as vascular, parenchymal, and biliary lesions with characteristic telangiectasias and vascular shunts. In a 37-year-old female patient, dynamic contrast-enhanced upper abdominal CT and MRI were performed. CT and MRI revealed dilated celiac trunk and hepatic artery. On early arterial phase, dilated hepatic veins showed significant enhancement. On arterial and portal venous phases, liver showed significantly heterogeneous contrast enhancement and showed homogenous enhancement in the hepatic parenchymal phase. On the magnetic resonance cholangiopancreatography, irregular biliary ducts with strictures and dilatation were seen. PMID:23198241

  20. Using the World Health Organization Classification of Thymic Epithelial Neoplasms to Describe CT Findings

    Microsoft Academic Search

    Noriyuki Tomiyama; Takeshi Johkoh; Naoki Mihara; Osamu Honda; Takenori Kozuka; Mitsuhiro Koyama; Seiki Hamad; Meinoshin Okumura; Mitsunori Ohta; Tadaaki Eimoto; Masao Miyagawa; Nestor L. Müller; Junpei Ikezoe; Hironobu Nakamura

    OBJECTIVE . Our purpose was to assess the CT features of various subtypes of thymic ep- ithelial neoplasms on the basis of the 1999 World Health Organization classification. MATERIALS AND METHODS . Thymic epithelial neoplasms in 53 patients who under- went thymectomy were retrospectively assessed histologically according to the 1999 World Health Organization classification. Type A and B neoplasms correspond

  1. CT finding of parapharyngeal space ectopic pituitary adenoma: Case report and review of literature.

    PubMed

    Wu, Xiao Feng; Wen, Ming

    2014-10-28

    Background: Ectopic pituitary adenoma (EPA) was first described by Erdheim in 1909, about 100 cases had been reported in literature, to the best of our knowledge, an EPA located in the parapharyngeal space has not been reported thus far. Method A 59-year old female presenting with a neck lump, which was painlessness and growing, without any neurological disorders or endocrine disorders. Auxiliary examinations includes ultrasound, electronic nasopharyngolarygnoscope, endocrine assessment, CT and CT angiography (CTA). Results CT showed a soft tissue density mass with clear boundary involving carotid sheath area. The contrast enhanced CT had heterogeneous density. Tissues around the mass were pushed and displaced. CTA showed the mass was hypervascular and supported by the right internal carotid artery and branches of external carotid artery. The tumor underwent a total removal and was confirmed as an adenoma with pituitary cells by histopathologic examinations, and postoperative recovery was wel1. Conclusions It is rarely seen that pituitary adenoma ectopic to parapharyngeal space. Diagnosis is difficult and mainly depends on the postoperative pathological examination. Head Neck, 2014. PMID:25352521

  2. Northwestern researchers find lower dosage CT-guided lung biopsy protocol maintains quality, minimizes exposure

    Cancer.gov

    New guidelines for CT-guided biopsies of lung nodules significantly reduce radiation exposure allowing individuals the benefit of the procedure, which may cut down on overall lung cancer deaths. This research is being presented at the Society of Interventional Radiology's 37th Annual Scientific Meeting in San Francisco, Calif.

  3. Study Finds Small Increase in Cancer Risk after Childhood CT Scans

    Cancer.gov

    A study published in the June 6, 2012, issue of The Lancet shows that radiation exposure from computed tomography (CT) scans in childhood results in very small but increased risks of leukemia and brain tumors in the first decade after exposure.

  4. PET CT Thresholds for Radiotherapy Target Definition in Non-Small-Cell Lung Cancer: How Close are we to the Pathologic Findings?

    SciTech Connect

    Wu Kailiang [Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON (Canada); Department of Radiotherapy, Cancer Hospital, Fudan University, Shanghai (China); Ung, Yee C., E-mail: yee.ung@sunnybrook.c [Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON (Canada); Hornby, Jennifer [Department of Thoracic Surgery, University of Toronto, Toronto, ON (Canada)

    2010-07-01

    Purpose: Optimal target delineation threshold values for positron emission tomography (PET) and computed tomography (CT) radiotherapy planning is controversial. In this present study, different PET CT threshold values were used for target delineation and then compared pathologically. Methods and Materials: A total of 31 non-small-cell lung cancer patients underwent PET CT before surgery. The maximal diameter (MD) of the pathologic primary tumor was obtained. The CT-based gross tumor volumes (GTV{sub CT}) were delineated for CT window-level thresholds at 1,600 and -300 Hounsfield units (HU) (GTV{sub CT1}); 1,600 and -400 (GTV{sub CT2}); 1,600 and -450 HU (GTV{sub CT3}); 1,600 and -600 HU (GTV{sub CT4}); 1,200 and -700 HU (GTV{sub CT5}); 900 and -450 HU (GTV{sub CT6}); and 700 and -450 HU (GTV{sub CT7}). The PET-based GTVs (GTV{sub PET}) were autocontoured at 20% (GTV{sub 20}), 30% (GTV{sub 30}), 40% (GTV{sub 40}), 45% (GTV{sub 45}), 50% (GTV{sub 50}), and 55% (GTV{sub 55}) of the maximal intensity level. The MD of each image-based GTV in three-dimensional orientation was determined. The MD of the GTV{sub PET} and GTV{sub CT} were compared with the pathologically determined MD. Results: The median MD of the GTV{sub CT} changed from 2.89 (GTV{sub CT2}) to 4.46 (GTV{sub CT7}) as the CT thresholds were varied. The correlation coefficient of the GTV{sub CT} compared with the pathologically determined MD ranged from 0.76 to 0.87. The correlation coefficient of the GTV{sub CT1} was the best (r = 0.87). The median MD of GTV{sub PET} changed from 5.72cm to 2.67cm as the PET thresholds increased. The correlation coefficient of the GTV{sub PET} compared with the pathologic finding ranged from 0.51 to 0.77. The correlation coefficient of GTV{sub 50} was the best (r = 0.77). Conclusion: Compared with the MD of GTV{sub PET}, the MD of GTV{sub CT} had better correlation with the pathologic MD. The GTV{sub CT1} and GTV{sub 50} had the best correlation with the pathologic results.

  5. Tumor thrombus in the renal vein from an adrenal metastasis of lung cancer: 18FDG PET/CT findings.

    PubMed

    Filippi, Luca; Sardella, Barbara; Ciorra, Alida; Scopinaro, Francesco; Bagni, Oreste

    2014-06-01

    Tumor thrombus is a rare complication of solid cancer. The authors report a case of a 76-year-old woman presenting a thick walled cystic mass in the lower lobe of the left lung. 18FDG positron emission tomography (PET)/computed tomography (CT) was performed, showing tracer accumulation in the wall of the pulmonary lesion and in the mediastinal and hilar lymph nodes. Moreover, PET/CT depicted a gross mass in the left adrenal gland and a hypermetabolic focus corresponding to the anatomic location of the left renal vein. Contrast-enhanced CT, subsequently performed, confirmed PET findings in the lung, lymph nodes, and adrenal glands, also demonstrating marginal enhancement and intraluminal filling defect in the left renal vein, which was interpreted as tumor thrombus due to the 18FDG uptake at PET scan. CT-guided biopsy of the mass was positive for poorly differentiated carcinoma. 18FDG PET can be useful to diagnose tumor thrombus in oncological patients. PMID:24852381

  6. A Comparison between 18F-FDG PET/CT Imaging and Biological and Radiological Findings in Restaging of Hepatoblastoma Patients

    PubMed Central

    Treglia, Giorgio; Pagano, Manuela; Fania, Piercarlo; Basso, Maria Eleonora; Fagioli, Franca; Ficola, Umberto

    2013-01-01

    Background. In this study we retrospectively evaluated if 18F-FDG-PET/CT provided incremental diagnostic information over CI in a group of hepatoblastoma patients performing restaging. Procedure. Nine patients (mean age: 5.9?years; range: 3.1–12?years) surgically treated for hepatoblastoma were followed up by clinical examination, serum ?-FP monitoring, and US. CI (CT or MRI) and PET/CT were performed in case of suspicion of relapse. Fine-needle aspiration biopsies (FNAB) were carried out for final confirmation if the results of CI, PET/CT, and/or ?-FP levels were suggestive of relapse. PET/CT and CI findings were analyzed for comparison purposes, using FNAB as reference standard. Results. ?-FP level was suggestive of disease recurrence in 8/9 patients. Biopsy was performed in 8/9?cases. CI and PET/CT resulted to be concordant in 5/9 patients (CI identified recurrence of disease, but 18F-FDG-PET/CT provided a better definition of disease extent); in 4/9 cases, CI diagnostic information resulted in negative findings, whereas PET/CT correctly detected recurrence of disease. 18F-FDG-PET/CT showed an agreement of 100% (8/8) with FNAB results. Conclusions. 18F-FDG-PET/CT scan seems to better assess HB patients with respect to CI and may provide incremental diagnostic value in the restaging of this group of patients. PMID:24063012

  7. Pulmonary Mucinous Cystadenocarcinoma: Report a Case and Review of CT Findings

    PubMed Central

    Choi, Youn Ah; Han, Joungho; Choi, Joon Young; Kim, Jhingook; Kwon, O Jung; Lee, Kyung Soo

    2013-01-01

    A pulmonary mucinous cystadenocarcinoma is an extremely rare tumor that is considered to be a cystic variant of mucin-producing lung adenocarcinoma. We present a case of pulmonary mucinous cystadenocarcinoma in a 54-year-old woman. Chest CT scans showed a 4.3-cm-sized, lobulated, well-defined, and homogeneous mass in the right middle lobe with peripheral stippled calcifications that demonstrated low-attenuation with no enhancement after contrast administration; 18F-fluorodeoxyglucose (FDG) PET/CT demonstrated mild heterogeneous FDG uptake. The mass was diagnosed as adenocarcinoma with mucin production by transbronchial lung biopsy. Right middle lobectomy was performed, and the pathologic examination disclosed a pulmonary mucinous cystadenocarcinoma. PMID:23483761

  8. Nutcracker Syndrome Accompanying Pelvic Congestion Syndrome; Color Doppler Sonography and Multislice CT Findings: A Case Report

    PubMed Central

    Inal, Mikail; Karadeniz Bilgili, Mihrace Yasemin; Sahin, Safa

    2014-01-01

    Nutcracker syndrome (NCS) is a rare pathology, caused by compression of the left renal vein (LRV) between the abdominal aorta (AA) and the superior mesenteric artery (SMA), due to reduction of the angle between AA and SMA. This leads to LRV varices, left gonadal vein varices and therefore, the pelvic congestion syndrome. For this reason, coexistence of NCS and pelvic congestion syndrome has been described. It manifests by hematuria, proteinuria, and nonspecific pelvic pain secondary to pelvic congestion, dyspareunia and persistent genital arousal. We report a 27-year-old woman who experienced hematuria and left flank pain. The diagnosis of NCS accompanied by pelvic congestion syndrome was missed initially, but later on the diagnosis was made by color Doppler ultrasound, abdominal computed tomography (CT) and CT angiography that were later performed. She refused interventional and surgical treatments, and was lost to follow up. PMID:25035694

  9. Focused radiation hepatitis after Bragg-peak proton therapy for hepatocellular carcinoma: CT findings

    SciTech Connect

    Okumura, Toshiyuki; Itai, Yuji; Tsuji, Hiroshi [Central Hospital of Ibaraki (Japan)] [and others

    1994-09-01

    Radiation hepatitis is clearly demonstrated by noncontrast and contrast enhanced CT following radiotherapy for liver diseases. Radiation hepatitis is dependent on dose distribution and is usually demonstrated as nonsegmental bandlike lesion after photon therapy. We report a case of focused, oval-shaped radiation hepatitis that was induced by photon therapy. The attenuation difference was localized in a high-dose area caused by Bragg-peak proton therapy. 17 refs., 2 figs.

  10. CT and MR in non-neonatal hypoxic–ischemic encephalopathy: radiological findings with pathophysiological correlations

    Microsoft Academic Search

    Leonardo Guilhermino Gutierrez; Ŕlex Rovira; Luiz Antonio Pezzi Portela; Claudia da Costa Leite; Leandro Tavares Lucato

    2010-01-01

    Non-neonatal hypoxic–ischemic encephalopathy is a clinical condition often related to cardiopulmonary arrest that demands\\u000a critical management and treatment decisions. Management depends mainly on the degree of neurological impairment and prognostic\\u000a considerations. Computed tomography (CT) is often used to exclude associated or mimicking pathology. If any, only nonspecific\\u000a signs such as cerebral edema, sulci effacement, and decreased gray matter (GM)\\/white matter

  11. Discrimination of gangrenous from uncomplicated acute cholecystitis: Accuracy of CT findings

    Microsoft Academic Search

    Cheng-Hsien Wu; Chien-Cheng Chen; Chao-Jan Wang; Yon-Cheong Wong; Li-Jen Wang; Chen-Chih Huang; Wan-Chak Lo; Huan-Wu Chen

    2011-01-01

    In acute cholecystitis, the presence of gangrene is associated with higher morbidity and mortality and necessitates open surgical\\u000a intervention rather than laparoscopic cholecystectomy. As Murphy’s sign may be absent, gangrene may not be detected ultrasonographically.\\u000a This retrospective study evaluated indications of acute gangrenous cholecystitis on computed tomography (CT) in 25 patients,\\u000a who were proven as having acute cholecysitis surgically and

  12. Cushing syndrome due to primary pigmented nodular adrenocortical disease: findings at CT and MR imaging.

    PubMed

    Doppman, J L; Travis, W D; Nieman, L; Miller, D L; Chrousos, G P; Gomez, M T; Cutler, G B; Loriaux, D L; Norton, J A

    1989-08-01

    Primary pigmented nodular adrenocortical disease (PPNAD) is a rare cause of Cushing syndrome in infants, children, and young adults. It is characterized by non-adrenocorticotropic hormone-dependent hypersecretion of cortisol by multiple, pigmented nodules of hyperplastic adrenocortical cells. With a single exception, adrenal glands have been described as normal with computed tomography (CT) in all previous series. Eight patients had Cushing syndrome due to surgically proved PPNAD. Four of the eight patients had stigmas of Carney complex (lentigines, calcified Sertoli cell tumors of the testes, and cardiac and soft-tissue myxomas). CT and/or magnetic resonance (MR) imaging demonstrated unilateral or bilateral nodularity in five of six patients examined. Macronodules (greater than 10 mm) were seen in the two oldest patients. As the clinical presentation of Cushing syndrome in this group of patients may be atypical (severe osteoporosis or short stature), the detection of multiple, small adrenocortical nodules with CT or MR imaging supports, or may even suggest, the diagnosis of PPNAD. PMID:2748822

  13. CT findings of breast cancer with clinically complete response following neoadjuvant chemotherapy--histological correlation.

    PubMed

    Ogawa, Yasuhiro; Nishioka, Akihito; Kubota, Kei; Kariya, Shinji; Yoshida, Shoji; Maeda, Hironori; Tanaka, Yosuke; Moriki, Toshiaki; Tochika, Naoshige

    2003-01-01

    In breast cancer patients, several regimens of neoadjuvant chemotherapy have been developed in order to achieve prognostic advantages for individual patients. Though some percentages of breast cancer patients show clinically complete response to neoadjuvant chemotherapy, the histopathological specimens of these patients demonstrate a considerably high frequency of the existence of residual disease. In this study, we aimed to evaluate the therapeutic effect of neoadjuvant chemotherapy for breast cancer patients showing clinically complete response (cCR) to neoadjuvant chemotherapy, using thin-section (5 mm) helical CT (prone position) with bolus injection of contrast agent. Between April 1994 and March 2002, 9 patients with breast cancer showing cCR to the neoadjuvant chemotherapy, who had undergone thin-section CT study both before and following neoadjuvant chemotherapy, enrolled in the study. The mean age of the patients was 46.2 years and all of them were female. The clinical stages were, 8 patients in stage II, and one in stage IIIA. In the CT evaluation, residual disease was visualized in 5 out of the 9 patients. Histopathological examination disclosed the existence of residual cancers in 6 out of the 9 patients, but only non-invasive cancer was revealed in 1 out of the 6. As patients having residual disease composed only of non-invasive cancer are classified into the pathologically complete response group according to the WHO classification, 4 out of these 9 patients showing clinically complete response to the neoadjuvant chemotherapy were classified into pCR (pathologically complete response) group, and another 5 were classified into the pPR (pathologically partial response) group. As a result, the diagnostic accuracy of the second CT study performed after neoadjuvant chemotherapy was evaluated as 77.8%, with a sensitivity of 80.0%, a specificity of 75.0%, a positive predictive value (PPV) of 80.0%, and a negative predictive value (NPV) of 75.0%. Therefore, for precise evaluation of the neoadjuvant chemotherapeutic effect for breast cancer, thin-section CT studies are considered to be essential. PMID:12883716

  14. High resolution CT and histological findings in idiopathic pleuroparenchymal fibroelastosis: Features and differential diagnosis

    PubMed Central

    2011-01-01

    Idiopathic pleuroparenchymal fibroelastosis (IPPFE) is a recently described clinical-pathologic entity characterized by pleural and subpleural parenchymal fibrosis, mainly in the upper lobes. As this disease is extremely rare (only 7 cases have been described in the literature to date) poorly defined cases of IPPFE can go unrecognized. The clinical course of disease is progressive and prognosis is poor, with no therapeutic options other than lung transplantation currently available, yet. The aim of this report is to describe two further cases of this rare disease, reviewing CT, clinical and histological features. PMID:21861891

  15. FDG PET/CT Findings of Malignant Fibrous Histiocytoma of the Stomach.

    PubMed

    Zheng, Wanwei; Chen, Jian; Liu, Jie; Zuo, Chuantao; Zhou, Zhongwen

    2015-05-01

    A 22-year-old man underwent an FDG PET/CT scan to evaluate possible malignancy due to melena and fever for 1 month. The images demonstrated intense FDG activity with an SUVmax of 24.6 in a large mass in the fundus of the stomach. Gastric malignant fibrous histiocytoma was histopathologically confirmed. Malignant fibrous histiocytoma is a high-grade and aggressive sarcoma, which usually occurs in the limbs or retroperitoneum. Malignant fibrous histiocytoma in the stomach is rare. PMID:25347349

  16. CT-Guided Transthoracic Core Biopsy for Pulmonary Tuberculosis: Diagnostic Value of the Histopathological Findings in the Specimen

    SciTech Connect

    Fukuda, Hozumi, E-mail: fkdhzmrad@mitsuihosp.or.jp; Ibukuro, Kenji; Tsukiyama, Toshitaka; Ishii, Rei [Mitsui Memorial Hospital, Department of Radiology (Japan)

    2004-09-15

    We evaluated the value of CT-guided transthoracic core biopsy for the diagnosis of mycobacterial pulmonary nodules. The 30 subjects in this study had pulmonary nodules that had been either diagnosed histopathologically as tuberculosis or were suspected as tuberculosis based on a specimen obtained by CT-guided transthoracic core biopsy. The histopathological findings, the existence of acid-fast bacilli in the biopsy specimens, and the clinical course of the patients after the biopsy were reviewed retrospectively. Two of the three histological findings for tuberculosis that included epithelioid cells, multinucleated giant cells and caseous necrosis were observed in 21 of the nodules which were therefore diagnosed as histological tuberculosis. Six of these 21 nodules were positive for acid-fast bacilli, confirming the diagnosis of tuberculosis. Thirteen of the 21 nodules did not contain acid-fast bacilli but decreased in size in response to antituberculous treatment and were therefore diagnosed as clinical tuberculosis. Seven nodules with only caseous necrosis were diagnosed as suspected tuberculosis, with a final diagnosis of tuberculosis being made in 4 of the nodules and a diagnosis of old tuberculosis in 2 nodules. Two nodules with only multinucleated giant cells were diagnosed as suspected tuberculosis with 1 of these nodules being diagnosed finally as tuberculosis and the other nodule as a nonspecific granuloma. When any two of the three following histopathological findings - epithelioid cells, multinucleated giant cells or caseous necrosis - are observed in a specimen obtained by CT-guided transthoracic core biopsy, the diagnosis of tuberculosis can be established without the detection of acid-fast bacilli or Mycobacterium tuberculosis.

  17. Unusual parapharyngeal lipoma.

    PubMed

    Pal, Pooja; Singh, Bikramjit; Sood, Arvinder Singh

    2015-03-01

    Lipomas of the parapharyngeal space (PPS) are extremely rare. CT scan and MRI are indispensable tools to investigate these hard to access tumors. PPS lipomas are confined to either the prestyloid or post styloid compartments. We report an unusual parapharyngeal lipoma involving both the compartments of the PPS. PMID:25621276

  18. Coronary involvement in Churg-Strauss syndrome: a case report with CT findings.

    PubMed

    Doo, Kyung Won; Yong, Hwan Seok; Kang, Eun-Young

    2013-12-01

    We report a case of Churg-Strauss syndrome (CSS) associated with coronary artery involvement, as demonstrated on coronary CT angiography (CCTA), without specific cardiac symptoms. A 69-year-old male had an 8-year history of bronchial asthma and chronic sinusitis with hypereosinophilia (35 %), polyneuropathy, and a positive antineutrophil cytoplasmic antibody titer, so he was diagnosed with CSS. The patient had no specific cardiac symptoms, but CCTA showed vasculitis and a saccular aneurysm involving the proximal coronary arteries. The 3-year follow-up CCTA demonstrated an increase in the extent of soft-tissue wall thickening and infiltration involving the coronary arteries. Although vasculitis of the major coronary arteries is not a prominent feature of CSS, our case suggests that the coronary arteries may also be targeted in this syndrome. PMID:24155026

  19. Primary malignant fibrous histiocytoma of the abdominal cavity: CT findings and pathological correlation

    PubMed Central

    Karki, Bivek; Xu, Yi-Kai; Wu, Yuan-Kui; Zhang, Wei-Wei

    2012-01-01

    AIM: To study computed tomography (CT) features of abdominal malignant fibrous histiocytoma (MFH) in various rare locations. METHODS: We retroprospectively identified cases of MFH involving the abdominal cavity. Particular attention was paid to details regarding imaging features and histological types. RESULTS: The study population consisted of seven men and one woman, with a mean age of 52.5 years. Seven patients had some physical symptoms, while one was incidentally detected. The sites of origin were liver (n = 3), greater omentum (n = 1), superior mesentery (n = 1), ileum (n = 1), right psoas muscle (n = 1) and right kidney (n = 1). With the exception of the ileum lesion, all were of huge size. The contour of the lesions was more or less clear. Foci of necrosis were present in six lesions (n = 6). On plain CT scan, all lesions were hypo to iso dense. The lesion in the greater omentum was cystic. One lesion (n = 1) showed significant enhancement and the cystic lesion showed mild peripheral enhancement. An abundance of blood vessels surrounding the mass was seen in two lesions (n = 2) and both were of the inflammatory variety. Pathological examination revealed storiform-pleomorphic variety (n = 4), inflammatory variety (n = 3) and myxoid variety (n = 1). Two of the patients with inflammatory MFH had a clinical presentation of fever and one was afebrile, however, blood investigations in all three showed leukocytosis. CONCLUSION: Primary MFHs of the abdominal viscera and gastrointestinal tract are generally huge soft tissue masses containing areas of low attenuation and mild to moderate contrast enhancement. PMID:22590669

  20. Necrotic lymphoma in a patient with post-transplantation lymphoproliferative disorder: ultrasonography and CT findings with pathologic correlation

    PubMed Central

    2015-01-01

    Seventeen months after kidney transplantation for the treatment of nephrotic syndrome, a retroperitoneal mass was incidentally detected in a 30-year-old man during routine follow-up. Ultrasonography revealed a mass measuring 5.5 cm×4.3 cm located between the liver and the atrophic right kidney, which showed markedly heterogeneous internal echogenicity. Contrast-enhanced computed tomography displayed a mild degree of enhancement only at the periphery of the mass, while the center lacked perceivable intensification. The patient underwent surgical resection. The final pathological diagnosis was non-Hodgkin lymphoma (diffuse large B-cell lymphoma), and extensive necrosis was observed on microscopic examination. We found that the prominent heterogeneous echogenicity of the mass (an unusual finding of lymphoma) demonstrated on ultrasonography is a result of extensive necrosis, which may sometimes occur in patients with post-transplantation lymphoproliferative disorder. PMID:25541069

  1. Necrotic lymphoma in a patient with post-transplantation lymphoproliferative disorder: ultrasonography and CT findings with pathologic correlation.

    PubMed

    Lee, Minsu; Kim, Sang Kyum; Chung, Yong Eun; Choi, Jin-Young; Park, Mi-Suk; Lim, Joon Seok; Kim, Myeong-Jin; Kim, Honsoul

    2015-04-01

    Seventeen months after kidney transplantation for the treatment of nephrotic syndrome, a retroperitoneal mass was incidentally detected in a 30-year-old man during routine follow-up. Ultrasonography revealed a mass measuring 5.5 cm×4.3 cm located between the liver and the atrophic right kidney, which showed markedly heterogeneous internal echogenicity. Contrast-enhanced computed tomography displayed a mild degree of enhancement only at the periphery of the mass, while the center lacked perceivable intensification. The patient underwent surgical resection. The final pathological diagnosis was non-Hodgkin lymphoma (diffuse large B-cell lymphoma), and extensive necrosis was observed on microscopic examination. We found that the prominent heterogeneous echogenicity of the mass (an unusual finding of lymphoma) demonstrated on ultrasonography is a result of extensive necrosis, which may sometimes occur in patients with post-transplantation lymphoproliferative disorder. PMID:25541069

  2. Variant of the left coronary artery with an unusual origin and course: anatomic and postmortem angiographic findings.

    PubMed

    Nerantzis, C E; Koutsaftis, P N

    1998-01-01

    This study demonstrates anatomic and postmortem angiographic findings characterizing the origin of the left coronary (LC) artery arising in common trunk with the right coronary (RC) artery from the right aortic sinus and its course via the ventricular septum (VS) to the left heart. This anomaly was a single finding observed among 388 angiographies and 60 corrosion castings. The course of the LC was divided in four segments. The first three form a curve that is upward concave. Large branches to the septomarginal trabecula (ST), VS, diagonals (DS), and the small anterior interventricular (anterior descending) artery originated from the outer part of this curve. In the anteroposterior x-ray, the above curve resembles a deep-bottom pot with a handle corresponding to the fourth segment. In the right anterior oblique, the first and second segments form a large erect angle. The third segment occupies the lower part of the absent proximal anterior interventricular artery, and the fourth crosses the outflow tract and the first segment in the middle. The course of these four segments of LC resembles the shape of the number 6. These findings are important for interpreting coronary angiographies in patients with this anomaly. PMID:9800915

  3. Unusual hanging deaths.

    PubMed

    Cooke, C T; Cadden, G A; Hilton, J M

    1988-12-01

    We describe the circumstances and medical findings of four unusual hanging deaths. In brief, the unusual features are tracheostomy, delayed death, self-mutilation combined with severe neck injury caused by lengthy drop, and homicidal hanging in a young girl. PMID:3239544

  4. Congenital malformations of the external and middle ear: high-resolution CT findings of surgical import

    SciTech Connect

    Swartz, J.D.; Faerber, E.N.

    1985-03-01

    The external auditory canal, middle ear, and bulk of the ossicular chain develop from the first branchial groove, first and second branchial arches, and first pharyngeal pouch. Embryologic development of these structures is complex and only rarely are two anomalies identical. This study includes 11 cases of unilateral external auditory canal atresia and two cases of bilateral atresia. Eight cases (four bilateral) of isolated congenital ossicular anomalies are also included. Emphasis is placed on findings of surgical import. All patients were studied with computed tomography only, because it was believed that the bony and soft-tissue detail achieved is superior to that with conventional multidirectional tomography.

  5. CT findings of ruptured intramural hematoma of the aorta extending along the pulmonary artery.

    PubMed

    Sueyoshi, Eijun; Sakamoto, Ichiro; Uetani, Masataka; Matsuoka, Yojiro; Suenaga, Etsuro

    2007-01-01

    Mediastinal hematoma extending along the pulmonary artery is a rare complication of Stanford type A classic (double-barreled) aortic dissection. Rupture from the posterior aspect of the aortic root penetrates the shared adventitia of the aorta and pulmonary artery. From this location, hematoma can spread along the adventitial planes of the pulmonary arteries out into the lungs. We report a case of ruptured intramural hematoma of the aorta (IMH) extending along the pulmonary artery. To our knowledge, this finding in patients with IMH has not been reported in the literature. PMID:16988873

  6. Metallosis and Metal-Induced Synovitis Following Total Knee Arthroplasty: Review of Radiographic and CT Findings.

    PubMed

    Romesburg, Jason W; Wasserman, Paul L; Schoppe, Candace H

    2010-01-01

    Metallosis and metal-induced synovitis are well-recognized complications of metal-backed polyethylene joint prostheses and have been frequently described in the orthopedic surgery literature; however, relatively fewer articles discussing the radiologic aspects of this complication have been published. To illustrate the importance of radiologic findings in the diagnosis and management of these patients, we present a case of metallosis and metal-induced synovitis complicating two revisions of a total knee arthroplasty, caused by polyethylene liner wear and dissociation of the polyethylene liner from the metal-backed patellar prosthesis. Specific attention is given to reviewing signs that aid in diagnosis, such as the "bubble sign," "cloud sign," and "metal-line signs." PMID:22470753

  7. Retroperitoneal ancient schwannoma presenting as an adrenal incidentaloma: CT and MR findings.

    PubMed

    Inokuchi, Taku; Takiuchi, Hidekazu; Moriwaki, Yuji; Ka, Tuneyoshi; Takahashi, Sumio; Tsutsumi, Zenta; Shima, Hiroki; Hirota, Seiichi; Yamamoto, Tetsuya

    2006-12-01

    A 35-year-old woman was referred to our institution for additional examinations to evaluate bilateral suprarenal masses incidentally found on abdominal ultrasonographic images obtained during an annual medical health checkup. Our computed tomographic scans showed bilateral and well-circumscribed low-density suprarenal masses, while MRI revealed the tumors to be heterogeneous with low intensity on T1-weighted images and high intensity on T2-weighted images. A laparoscopic adrenalectomy was performed under the suspicion of a malignant tumor, such as a malignant fibrous histiocytoma. Pathologic findings indicated a retroperitoneal ancient schwannoma of two histologic types: Antoni A and Antoni B. We considered that elucidation of the characteristic features of a schwannoma would provide helpful preoperative information for diagnosis. PMID:17145411

  8. Metallosis and Metal-Induced Synovitis Following Total Knee Arthroplasty: Review of Radiographic and CT Findings

    PubMed Central

    Romesburg, Jason W.; Wasserman, Paul L.; Schoppe, Candace H.

    2010-01-01

    Metallosis and metal-induced synovitis are well-recognized complications of metal-backed polyethylene joint prostheses and have been frequently described in the orthopedic surgery literature; however, relatively fewer articles discussing the radiologic aspects of this complication have been published. To illustrate the importance of radiologic findings in the diagnosis and management of these patients, we present a case of metallosis and metal-induced synovitis complicating two revisions of a total knee arthroplasty, caused by polyethylene liner wear and dissociation of the polyethylene liner from the metal-backed patellar prosthesis. Specific attention is given to reviewing signs that aid in diagnosis, such as the “bubble sign,” “cloud sign,” and “metal-line signs.” PMID:22470753

  9. Characteristic Findings on Panoramic Radiography and Cone-beam CT to Predict Paresthesia after Extraction of Impacted Third Molar.

    PubMed

    Harada, Nana; Beloor Vasudeva, Subash; Matsuda, Yukiko; Seki, Kenji; Kapila, Rishabh; Ishikawa, Noboru; Okano, Tomohiro; Sano, Tsukasa

    2015-01-01

    The purpose of this study was to compare findings on the relationship between impacted molar roots and the mandibular canal in panoramic and three-dimensional cone-beam CT (CBCT) images to identify those that indicated risk of postoperative paresthesia. The relationship between impacted molars and the mandibular canal was first classified using panoramic images. Only patients in whom the molar roots were either in contact with or superimposed on the canal were evaluated using CBCT. Of 466 patients examined using both panoramic and CBCT images, 280 underwent surgical extraction of an impacted molar, and 15 of these (5%) reported postoperative paresthesia. The spatial relationship between the impacted third molar root and the mandibular canal was determined by examining para-sagittal sections (lingual, buccal, inter-radicular, inferior, and combinations) obtained from the canal to the molar root and establishing the proximity of the canal to the molar root (in contact with or without loss of the cortical border and separate). The results revealed that darkening of the roots with interruption of the mandibular canal on panoramic radiographs and the inter-radicular position of the canal in CBCT images were characteristic findings indicative of risk of postoperative paresthesia. These results suggest that careful surgical intervention is required in patients with the above characteristics. PMID:25765570

  10. Unusually high frequency of (CT)n and (GT)n microsatellite loci in a yellowjacket wasp, Vespula rufa (L.) (Hymenoptera: Vespidae).

    PubMed

    Thorén, P A; Paxton, R J; Estoup, A

    1995-08-01

    A high number of (GT)n and (CT)n microsatellites were isolated from a partial genomic library of primitively eusocial wasp, Vespula rufa. On average, (GT)n and (CT)n repeats occur in the genome approximately every 8 kb and 2.5 kb respectively. This is the highest density of dinucleotide microsatellites reported in the literature. Predominant categories of repeats are imperfect and compound repeats for (GT)n microsatellites and perfect repeats for (CT)n microsatellites. Comparisons with other Hymenoptera and with mammalian species showed significant differences in the frequency distribution of these categories of repeats. Many (CT)n and (GT)n repeats are surrounded by various types of microsatellites, suggesting an associative distribution of short tandem repeats. A high level of intracolonial polymorphism is demonstrated with one microsatellite locus, showing that multiple mating of the queen occurs in V. rufa. PMID:8589840

  11. Findings

    NSDL National Science Digital Library

    Starting in February 2001, the National Institute of General Medical Sciences (NIGMS) began publishing "Findings" magazine. The publication features research and findings from scholars doing work with funding from the NIGMS. Visitors can browse the archive of the publication by topic or date, and they can also check out the sample articles from the latest edition on the homepage. Recent pieces have included "Drugs from Deep Down", "Mesmerized by Metals", and "Just Found", which talks about potential sunburn treatments. The site also has the "Find More" area, which contains an image gallery, school resources, free slide kits, and interactive games. Also, the "Watch" area contains interviews with scientists like Dr. Kevin Tracey talking about his investigations into sepsis. Finally, visitors can also sign up to receive Findings via email.

  12. 75 FR 38148 - Finding of No Significant Impact Related to Approval of the Mallinckrodt C-T Phase 2...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-01

    ...was under contract with the Manhattan Engineering District and the...facility associated with the C-T project meet NRC(s release criteria...elected to decommission the C-T project areas of the site in two phases...Phase 1 of the decommissioning project was completed in February...

  13. Malignant Pleural Mesothelioma Caused by Environmental Exposure to Asbestos in the Southeast of Turkey: CT Findings in 117 Patients

    Microsoft Academic Search

    H. Bayram; F. Topçu; A. Bilici; i. H. Leblebici

    2000-01-01

    Background and Objectives: Malignant pleural mesothelioma (MPM) is reported to be common in the southeast of Turkey, as a result of environmental asbestos exposure. The aim of this study was to evaluate the computed tomography (CT) features of MPM in patients with a history of asbestos exposure. Methods: The CT scans of 117 patients who had a diagnosis of MPM

  14. Decisive role of SPECT/CT in localization of unusual periscapular sentinel nodes in patients with posterior trunk melanoma: three illustrative cases and a review of the literature.

    PubMed

    Alvarez Paez, Ana Melissa; Brouwer, Oscar R; Veenstra, Hidde J; van der Hage, Jos A; Wouters, Michel; Nieweg, Omgo E; Valdés-Olmos, Renato A

    2012-06-01

    Sentinel node mapping is widely applied in patients with melanoma. Although this type of skin cancer usually drains to the standard regional nodal basins, some patients have drainage to an unpredicted site. Nodes lying along a lymphatic channel, between the primary melanoma site and a common basin, are often called interval, in-transit, ectopic, intercalated, or aberrant nodes. They must be considered sentinel lymph nodes because they receive direct lymphatic drainage from a primary tumor site. Most investigators agree that interval sentinel nodes should be harvested; however, the management of melanoma patients with an involved interval sentinel node without established metastasis in the regional basin downstream is controversial. New and innovating technologies have improved nuclear medicine images, including single-photon emission computed tomography/computed tomography (SPECT/CT), a multimodal technique that fuses the radioactivity distribution detected by SPECT with the anatomic information harvested by CT. SPECT/CT does not replace the conventional planar images; it should be considered as a complementary modality for the search of sentinel lymph nodes. We report three illustrative cases that underline the decisive role of SPECT/CT with two-dimensional and three-dimensional reconstruction images to localize the uncommon periscapular sentinel nodes in patients with melanoma of the posterior trunk. The use of this image fusion technique on these patients leads to improved preoperative visualization of the sentinel nodes, may help identify additional periscapular interval sentinel nodes, and enables precise localization of the nodes with their surrounding anatomic structures. The cases are discussed together with a review of the literature. PMID:22456165

  15. A Case of Secondary Syphilis Involving Tonsil, Pulmonary, and Multiple Lymph Nodes: 18F-FDG PET/CT Findings.

    PubMed

    Fu, Zhanli; Zhang, Jin; Li, Qian; Liu, Meng; Kang, Lei

    2015-04-01

    A 50-year-old man with general fatigue and weight loss underwent FDG PET/CT scan to detect possible occult malignancy. The images revealed abnormal FDG activity in the tonsils, right lung, and in the cervical, axillary, and inguinal lymph nodes. Lymphoma was initially suspected. However, pathologic examination after cervical lymph node biopsy revealed only reactive hyperplasia. Further examinations including serologic tests led to a diagnosis of secondary syphilis. A follow-up PET/CT scan after a 6-month benzylpenicillin therapy showed significant interval improvement. PMID:25546195

  16. Recurrent dermatofibrosarcoma protuberans with pulmonary metastases presenting twelve years after initial diagnosis: 18F-FDG PET/CT imaging findings.

    PubMed

    Suman, Sudhir; Sharma, Punit; Jain, Tarun Kumar; Sahoo, Manas Kumar; Bal, Chandrasekhar; Kumar, Rakesh

    2014-01-01

    Dermatofibrosarcoma protuberans is a rare cutaneous tumor that is locally aggressive and has a high rate of recurrence after surgical excision. The tumor grows slowly, typically over years. On rare occasions, metastasis to distant sites (especially the lung) or regional lymph nodes may occur. Here, we present F-FDG PET/CT imaging findings of a 52-year-old man with a local recurrence of dermatofibrosarcoma protuberans in the anterior abdominal wall with metastases to bilateral lungs. PMID:23531730

  17. Cardiac CT

    MedlinePLUS

    ... coronary arteries. Another type of CT scanner, called electron-beam computed tomography (EBCT), also is used to ... that explore whether a medical strategy, treatment, or device is safe and effective for humans. To find ...

  18. Quantitative assessment of left ventricular function with dual-source CT in comparison to cardiac magnetic resonance imaging: initial findings

    Microsoft Academic Search

    S. Busch; T. R. C. Johnson; B. J. Wintersperger; N. Minaifar; A. Bhargava; C. Rist; M. F. Reiser; C. Becker; K. Nikolaou

    2008-01-01

    Cardiac magnetic resonance imaging and echocardiography are currently regarded as standard modalities for the quantification\\u000a of left ventricular volumes and ejection fraction. With the recent introduction of dual-source computedtomography (DSCT),\\u000a the increased temporal resolution of 83 ms should also improve the assessment of cardiac function in CT. The aim of this study\\u000a was to evaluate the accuracy of DSCT in the

  19. [Findings of the (18)F-FDG PET-CT in a cardiac angiosarcoma complicated by a cardiac rupture].

    PubMed

    Santiago-Chinchilla, Alicia; Ruiz-Carazo, Eduardo; Moral-Ruiz, Antonio; Testart Dardel, Nathalie; Martínez-Martínez, Alberto; López-Fernández, Silvia

    2014-01-01

    Primary malignant tumors of the heart are a rare condition. The most common type is the cardiac angiosarcoma. The symptoms of this disease are very nonspecific and can be very difficult to diagnose by conventional imaging techniques. We report the case of a male patient with cardiac angiosarcoma who also had a rare complication, this being cardiac rupture, which required the use of (18)F-FDG PET-CT to demonstrate the mass malignancy and to reach a definitive diagnosis. PMID:23810660

  20. CT and MR findings in ruptured dermoid cyst in the right parasellar cistern: report of a case.

    PubMed

    Grijseels, S; Stadnik, T; Bauwens, L; De Witte, M; Osteaux, M

    1992-02-01

    A case of ruptured dermoid cyst in the right parasellar cistern imaged by MRI and CT is reported. The disseminated lipid droplets were found scattered throughout the subarachnoid spaces including the prepontine cisterns, in front of the right petrous apex as well as bilaterally in the frontal horns. The density of the lipid droplets was comprised between -80 and -100 HU. The lesions were hyperintense on T1-weighted images and hypointense on T2-weighted images. PMID:1569004

  1. Immediate periodontal bone plate changes induced by rapid maxillary expansion in the early mixed dentition: CT findings

    PubMed Central

    Garib, Daniela Gamba; Menezes, Maria Helena Ocké; da Silva Filho, Omar Gabriel; dos Santos, Patricia Bittencourt Dutra

    2014-01-01

    Objective This study aimed at evaluating buccal and lingual bone plate changes caused by rapid maxillary expansion (RME) in the mixed dentition by means of computed tomography (CT). Methods The sample comprised spiral CT exams taken from 22 mixed dentition patients from 6 to 9 years of age (mean age of 8.1 years) presenting constricted maxillary arch treated with Haas-type expanders. Patients were submitted to spiral CT scan before expansion and after the screw activation period with a 30-day interval between T1 and T2. Multiplanar reconstruction was used to measure buccal and lingual bone plate thickness and buccal bone crest level of maxillary posterior deciduous and permanent teeth. Changes induced by expansion were evaluated using paired t test (p < 0.05). Results Thickness of buccal and lingual bone plates of posterior teeth remained unchanged during the expansion period, except for deciduous second molars which showed a slight reduction in bone thickness at the distal region of its buccal aspect. Buccal bone dehiscences were not observed in the supporting teeth after expansion. Conclusion RME performed in mixed dentition did not produce immediate undesirable effects on periodontal bone tissues. PMID:25162564

  2. Well-differentiated neuroendocrine carcinoma mimicking an echinococcus cyst of the liver in CT-MRI findings with hepatocyte specific contrast material.

    PubMed

    Krohn, Michaela; Grieser, Christian; Weichert, Wilko; Pascher, Andreas; Denecke, Timm

    2011-12-01

    Gastroenteropancreatic neuroendocrine tumors and their metastases have an inconsistent appearance with only a small percentage of lesions appearing as cystic masses in computed tomography (CT) and magnetic resonance imaging (MRI) and can therefore be mistaken as benign or infectious lesions, leading to a false diagnosis with delayed and inadequate treatment. We report a patient with upper abdominal pain lasting for several months, caused by a huge cystic neuroendocrine carcinoma of the liver which was mistakenly interpreted as an echinococcus cyst and present the findings in the initial CT and the subsequently performed MRI under application of hepatocyte specific contrast material, which led to distinct differential diagnoses and therefore had a capacious impact on the therapeutic strategy. PMID:22187713

  3. Mass General study finds laxative-free CT colonography may be as accurate as colonoscopy in detecting high-risk polyps

    Cancer.gov

    A CT-scan-based form of virtual colonoscopy that does not require laxative preparation appears to be as effective as standard colonoscopy in identifying the intestinal polyps most likely to become cancerous. In the May 15 issue of Annals of Internal Medicine, a Massachusetts General Hospital-based research team reports finding that the new technique, which uses computer-aided systems both to virtually cleanse and to analyze the images acquired, was able to identify more than 90 percent of the common polyps called adenomas that were 10 mm or larger.

  4. Leptomeningeal carcinomatosis as only pathological finding at FDG-PET/CT in case of tumor marker elevation in breast cancer.

    PubMed

    Grande, Maria Luz Dominguez; Rayo, Juan Ignacio; Serrano, Justo; Infante, Jose Rafael; Garcia, Lucia; Duran, Carmen; Gomez-Caminero, Felipe

    2014-01-01

    Leptomeningeal carcinomatosis is an infrequent disease and although its treatment is palliative, earlier diagnosis will lead to prolonged survival and improve functional outcome. Whole-body FDG-PET allows the entire spinal cord to be examined noninvasively, so close attention should be paid to the spinal canal, since these lesions can easily be mistaken for physiologic uptake, sometimes there is no clinical suspicion and may occur without concurrent active cancer. We present a female patient with a history of carcinoma of the breast, who presented an elevation of serum tumor marker CA 15-3. An FDG-PET/CT study only revealed multiple abnormal uptake at the vertebral foramen at thoracic and lumbosacral regions suggesting leptomeningeal metastases that were confirmed by MRI and cerebrospinal fluid cytology. PMID:24591787

  5. Rare solitary focal tuberculous involvement of liver masquerading as hepatic metastasis on FDG PET/CT in a case of fibular round cell tumor

    PubMed Central

    Puranik, Ameya D; Purandare, Nilendu C; Sridhar, Epari; Agrawal, Archi; Shah, Sneha; Rangarajan, Venkatesh

    2015-01-01

    Finding of focal 18F-fluoro-deoxyglucose (FDG) uptake in liver on FDG positron emission tomography/computed tomography (FDG PET/CT) in a known case of malignancy is often considered to be metastases. We report a similar finding on FDG PET/CT in a case of Ewing's sarcoma of thigh, which turned out to be of tuberculous etiology, an unusual cause of false positive FDG uptake in the liver. PMID:25589811

  6. CT Imaging Findings and Their Relevance to the Clinical Outcomes After Stent Graft Repair of Penetrating Aortic Ulcers: Six-year, Single-center Experience

    SciTech Connect

    Shin, Ji Hoon [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology (Korea, Republic of); Angle, John F.; Park, Auh Whan; Anderson, Curtis; Sabri, Saher S.; Turba, Ulku C. [University of Virginia Health System, Division of Angiography, Interventional Radiology and Special Procedures, Department of Radiology (United States); Kern, John A.; Cherry, Kenneth J. [University of Virginia Health System, Department of Surgery (United States); Matsumoto, Alan H., E-mail: ahm4d@virginia.edu [University of Virginia Health System, Division of Angiography, Interventional Radiology and Special Procedures, Department of Radiology (United States)

    2012-12-15

    Purpose: To present the computed tomographic (CT) imaging findings and their relevance to clinical outcomes related to stent graft placement in patients with penetrating aortic ulcers (PAUs). Methods: Medical and imaging records and imaging studies were reviewed for consecutive patients who underwent stent graft repair of a PAU. The distribution and characteristics of the PAU, technical success of stent graft repair, procedure-related complications, associated aortic wall abnormalities, and outcomes of the PAUs at follow-up CT scans were evaluated. Results: Fifteen patients underwent endovascular treatment for PAU. A total of 87% of the PAUs were in the proximal (n = 8) or distal (n = 5) descending thoracic aorta. There was a broad spectrum of PAU depth (mean, 7.9 {+-} 5.6 mm; range 1.5-25.0 mm) and diameter (mean, 13.5 {+-} 9.7 mm; range 2.2-41.0 mm). Atherosclerosis of the thoracic aorta and intramural hematoma were associated in 53 and 93% of the patients, respectively. Technical success was achieved in 100%. Two or more stent grafts were used in five patients. Endoleaks were observed in two patients within 2 weeks of the procedure, both of which resolved spontaneously. At follow-up CT scanning, regression and thrombosis of the PAUs were observed in all patients. The average patient survival was 61.8 months, with an overall mortality of 13% (2 of 15) at follow-up. Neither death was related to the endograft device or the PAU. Conclusion: Endovascular stent graft placement was safe and effective in causing regression and thrombosis of PAUs in this small series of patients. Two or more stent grafts were used in five patients (33%) with associated long-segmental atherosclerotic changes of the thoracic aorta or intramural hematoma.

  7. Clinically-Important Brain Injury and CT Findings in Pediatric Mild Traumatic Brain Injuries: A Prospective Study in a Chinese Reference Hospital

    PubMed Central

    Zhu, Huiping; Gao, Qi; Xia, Xin; Xiang, Joe; Yao, Hongli; Shao, Jianbo

    2014-01-01

    This study investigated injury patterns and the use of computed tomography (CT) among Chinese children with mild traumatic brain injury (MTBI). We enrolled children with MTBI who were treated within 24 hours of head trauma in the emergency department of Wuhan Medical Care Center for Women and Children in Wuhan, China. Characteristics of MTBIs were analyzed by age and gender. Results of cranial CT scan and clinically-important brain injury (ciTBI) for children were obtained. The definition of ciTBI was: death from TBI, intubation for more than 24 h for TBI, neurosurgery, or hospital admission of 2 nights or more. Of 455 eligible patients with MTBI, ciTBI occurred in two, and no one underwent neurosurgical intervention. CT scans were performed for 441 TBI patients (96.9%), and abnormal findings were reported for 147 patients (33.3%, 95% CI 29.0–37.8). Falls were the leading cause of MTBI (61.5%), followed by blows (18.9%) and traffic collisions (14.1%) for children in the 0–2 group and 10–14 group. For children aged between 3 and 9, the top three causes of TBI were falls, traffic collisions and blows. Leisure activity was the most reported activity when injuries occurred for all age groups. Sleeping/resting and walking ranked in the second and third place for children between 0 and 2 years of age, and walking and riding for the other two groups. The places where the majority injuries occurred were the home for the 0–2 and 3–9 years of age groups, and school for the 10–14 years of age group. There was no statistical difference between boys and girls with regard to the activity that caused the MTBI. This study highlights the important roles that parents and school administrators in the development of preventive measures to reduce the risk of traumatic brain injury in children. Also, identifying children who had a head trauma at very low risk of clinically important TBI for whom CT might be unnecessary is a priority area of research in China. PMID:24675642

  8. The Multi-Detector CT findings of giant abdominal lymphangiectasis mimicking a mesenteric cystic mass in a patient with midgut volvulus.

    PubMed

    Kantarci, Mecit; Doganay, Selim; Kurtcan, Serpil; Gundogdu, Cemal; Oral, Akgun; Demir, Berrin

    2008-08-01

    Our purpose is to show the Multi-Detector CT (MDCT) findings of an intra-abdominal giant cystic lesion with midgut volvulus and to share our experience with giant lymphangiectasis mimicking a mesenteric cyst or a cystic mass. The pathological evaluation indicated that the cyst contained abdominal lymphatic material. Malrotation is usually detected in infants and children, but rarely in adults. In patients with chronic and recurrent volvulus, chronic venous congestion with lymphatic engorgement may occur. Interference with lymphatic drainage may result in formation of a lymphangioma or a chylous mesenteric cyst. In our case, because of the intestinal lymphatic torsion, there was a cystic lesion mimicking a mesenteric cyst or a cystic mass. To our knowledge, this is the first case of midgut volvulus and large mesenteric lymphangiectasis to be depicted by MDCT. PMID:25610038

  9. The added value of hybrid ventilation/perfusion SPECT/CT in patients with stable COPD or apparently healthy smokers. Cancer-suspected CT findings in the lungs are common when hybrid imaging is used

    PubMed Central

    Jögi, Jonas; Markstad, Hanna; Tufvesson, Ellen; Bjermer, Leif; Bajc, Marika

    2015-01-01

    Ventilation/perfusion (V/P) single-photon emission computed tomography (SPECT) is recognized as a diagnostic method with potential beyond the diagnosis of pulmonary embolism. V/P SPECT identifies functional impairment in diseases such as heart failure (HF), pneumonia, and chronic obstructive pulmonary disease (COPD). The development of hybrid SPECT/computed tomography (CT) systems, combining functional with morphological imaging through the addition of low-dose CT (LDCT), may be useful in COPD, as these patients are prone to lung cancer and other comorbidities. The aim of this study was to investigate the added value of LDCT among healthy smokers and patients with stable COPD, when examined with V/P SPECT/CT hybrid imaging. Sixty-nine subjects, 55 with COPD (GOLD I–IV) and 14 apparently healthy smokers, were examined with V/P SPECT and LDCT hybrid imaging. Spirometry was used to verify COPD grade. Only one apparently healthy smoker and three COPD patients had a normal or nearly normal V/P SPECT. All other patients showed various degrees of airway obstruction, even when spirometry was normal. The same interpretation was reached on both modalities in 39% of the patients. LDCT made V/P SPECT interpretation more certain in 9% of the patients and, in 52%, LDCT provided additional diagnoses. LDCT better characterized the type of emphysema in 12 patients. In 19 cases, tumor-suspected changes were reported. Three of these 19 patients (ie, 4.3% of all subjects) were in the end confirmed to have lung cancer. The majority of LDCT findings were not regarded as clinically significant. V/P SPECT identified perfusion patterns consistent with decompensated left ventricular HF in 14 COPD patients. In 16 patients (23%), perfusion defects were observed. HF and perfusion defects were not recognized with LDCT. In COPD patients and long-time smokers, hybrid imaging had added value compared to V/P SPECT alone, by identifying patients with lung malignancy and more clearly identifying emphysema. V/P SPECT visualizes comorbidities to COPD not seen with LDCT, such as pulmonary embolism and left ventricular HF. PMID:25565797

  10. Ultrasonography, X-ray and CT imaging findings of a giant pericardial lipoma: Imaging diagnosis and review of the literature

    PubMed Central

    ZHU, HAOHUI; WANG, MEIYUN; FENG, DEGUANG; FENG, YAN; REN, YING; CHEN, JIYUN; HE, YAO; YUAN, JIANJUN

    2014-01-01

    Pericardial lipomas are rare and mostly asymptomatic tumors, which are usually detected incidentally during physical examination. The present study describes a case of giant pericardial lipoma that was diagnosed by surgical pathology. The study also describe the X-ray, magnetic resonance imaging, and the distinguish of the pericardial lipomas. The study also describes the ultrasonography, X-ray, computed tomography and magnetic resonance imaging findings of the tumor, and a review of the literature of cardiac lipoma, to help increase awareness of the tumor and selection of the correct imaging method for diagnosis. PMID:24348847

  11. Unusual urticarias.

    PubMed

    Black, A K

    2001-11-01

    Typical urticarial lesions are transient cutaneous swellings of sudden onset, often itchy, persisting for less than 24 hours and resolving to leave normal appearing skin. Angioedema lesions are similar subcutaneous lesions. Atypical urticarias persist for longer than 24 hours, may be painful and bruised in appearance and accompanied with severe systemic symptoms. Conditions where prolonged weals are present include delayed pressure urticaria and urticarial vasculitis. These conditions do not respond well to antihistamine therapy. In delayed pressure urticaria, weals appear after a delay of hours at sites of sustained pressure on the skin and occur in association with ordinary chronic 'idiopathic' urticaria. Weals of urticarial vasculitis show histological features of venulitis, and can be accompanied by arthralgia and abdominal pain. Rarely, the condition is due to infective or autoimmune disease. Urticarial diseases, sometimes with features of urticarial vasculitis, and with associated systemic features include Schnitzler's Syndrome, Still's disease and Muckle-Wells syndrome. The latter syndrome is linked with chromosome 1q44, as is autosomal dominant cold urticaria, an unusual physical urticaria. Persistent cholinergic erythema, a variant of cholinergic urticaria, has been mistaken for a drug eruption or cutaneous mastocytosis. Rarely, food and exercise induced urticaria and anaphylaxis occur when exercise follows a specific food or any meal within a few hours. The early stages of inflammatory disease may be mistaken for urticaria and angioedema, but lesions usually persist for longer than 48 hours and are accompanied by epidermal changes. PMID:11770721

  12. Extra- and intra-cranial arterial calcifications in adults depicted as incidental findings on cone beam CT images.

    PubMed

    Damaskos, Spyros; Tsiklakis, Kostas; Syriopoulos, Kostas; der Stelt, Paul van

    2015-04-01

    Abstract Objective. The aim of this study was to evaluate, retrospectively, the gender- and age-related prevalence of incidentally found calcifications, depicted within the course of the extra- and intra-cranial portion of internal carotid artery (ICA), in cone beam computed tomography (CBCT) examinations in adults, and to assess their clinical significance. Materials and methods. Out of a pull of 700 CBCT examinations a total of 484 CBCT scans of adult patients were finally selected according to a set of pre-defined criteria. These were evaluated for arterial calcifications presence within the ICAs course according to gender and age criteria. Results. In total, 492 calcifications were detected: 211 (42.88%) extra-cranial and 281 (57.11%) intra-cranial. Those were recorded in 150 scans (30.99%) and 161 scans (33.26%), respectively. Calcifications, with either extra- or intra-cranial allocation, were found more frequent in males than in females (all p-values < 0.05); also patients who presented with positive findings were older than those without findings (all p-values < 0.05). Furthermore, calcification presence with either extra- or intra-cranial allocation increases with age (all p-values < 0.05). Conclusion. Significant calcification frequencies were found within the ICA's course, in CBCT scans. Moreover, an increased incidence of either extra- or intra-cranial presence of these depictions and its relation to age and gender was documented. PMID:25387064

  13. A case of boomerang dysplasia with a novel causative mutation in filamin B: identification of typical imaging findings on ultrasonography and 3D-CT imaging.

    PubMed

    Tsutsumi, Seiji; Maekawa, Ayako; Obata, Miyuki; Morgan, Timothy; Robertson, Stephen P; Kurachi, Hirohisa

    2012-01-01

    Boomerang dysplasia is a rare lethal osteochondrodysplasia characterized by disorganized mineralization of the skeleton, leading to complete nonossification of some limb bones and vertebral elements, and a boomerang-like aspect to some of the long tubular bones. Like many short-limbed skeletal dysplasias with accompanying thoracic hypoplasia, the potential lethality of the phenotype can be difficult to ascertain prenatally. We report a case of boomerang dysplasia prenatally diagnosed by use of ultrasonography and 3D-CT imaging, and identified a novel mutation in the gene encoding the cytoskeletal protein filamin B (FLNB) postmortem. Findings that aided the radiological diagnosis of this condition in utero included absent ossification of two out of three long bones in each limb and elements of the vertebrae and a boomerang-like shape to the ulnae. The identified mutation is the third described for this disorder and is predicted to lead to amino acid substitution in the actin-binding domain of the filamin B molecule. PMID:22354125

  14. Finding Galaxies with Unusual HI Content

    NASA Astrophysics Data System (ADS)

    Dénes, H.; Kilborn, V.; Koribalski, B.

    2014-03-01

    Observations show that galaxies in galaxy clusters are strongly influenced by their environment. There is growing evidence that some galaxies in groups show similar properties to galaxies in clusters, such as redder colors and gas deficiency, highlighting that environmental processes are also effective on galaxy group scales. The question is though, which mechanisms are important in low density environments? To answer this, we identify gas deficient galaxies to investigate recent or ongoing environmental processes, such as gas stripping. We are using scaling relations between the neutral hydrogen (HI) content and optical properties of galaxies to identify galaxies with significantly less HI than an average galaxy of the same type. For this, we derive new, multi-wavelength HI-optical scaling relations using the HI Parkes All Sky Survey (HIPASS) with optical and near infrared datasets. We also show our preliminary results from observations of a sample of 6 HI-deficient galaxies, which we identified in low density environments.

  15. Giant ovarian cyst--an unusual finding.

    PubMed

    Mehboob, Mukhtar; Naz, Samina; Zubair, Muhammad; Kasi, Muhammad Ashraf

    2014-01-01

    A 16 year old unmarried girl presented with complaints of abdominal distension, vomiting, constipation, difficulty in breathing and restlessness. On examination abdomen was grossly distended with fluid thrill. Ultrasonographic examination revealed that there was a huge cystic collection with internal debris, multiple septations involving the whole abdomen and pelvis originating from right ovary. The left ovary was normal. Her laparatomy was done. A giant ovarian cyst measuring 45 x 32 x 28 cm, which weighed 18 Kg (almost 1/3 of whole body weight), was removed as such like a yoyo balloon. Post-operative recovery was smooth. Histopathological examination revealed that it was mucinous cystadenoma. PMID:25603687

  16. An Incidental Finding of Mucinous Colon Cancer by 18F-Choline PET/CT Determining a Change in Clinical Management of a Patient with Recurrent Prostate Adenocarcinoma

    PubMed Central

    Tuscano, Carmelo; Al Sayyad, Said

    2014-01-01

    A 66-year-old-man underwent a PET/CT scan after a biochemical relapse for a prostate cancer previously treated with a laparoscopic surgical procedure which revealed a focal uptake in the posterior wall of sigmoid colon. The biopsy demonstrated a colon cancer with mucinous differentiation producing a shift in clinical priority. To the best of our knowledge this is the first report in the English literature describing the detection by 18F-choline PET/CT of a colorectal cancer with mucinous differentiation. PMID:25197590

  17. Radiographic plain film and CT findings in lipoid pneumonia in infants following aspiration of mineral oil used in the treatment of partial small bowel obstruction by Ascaris lumbricoides

    Microsoft Academic Search

    G. A. de Oliveira; S. R. Del Caro; C. M. Bender Lamego; P. R. Merçon Vargas; V. E. C. Vervloet

    1985-01-01

    Four children developed lipoid pneumonia following ingestion of mineral oil for the treatment of partial small bowel obstruction\\u000a byAscaris lumbricoides whorl. CT of the chest showed negative Hounsfield numbers which may prove useful in diagnosis.

  18. Diagnostic efficacy of gadoxetic acid (Primovist)-enhanced MRI and spiral CT for a therapeutic strategy: comparison with intraoperative and histopathologic findings in focal liver lesions.

    PubMed

    Hammerstingl, Renate; Huppertz, Alexander; Breuer, Josy; Balzer, Thomas; Blakeborough, Anthony; Carter, Rick; Fusté, Lluis Castells; Heinz-Peer, Gertraud; Judmaier, Werner; Laniado, Michael; Manfredi, Riccardo M; Mathieu, Didier G; Müller, Dieter; Mortelč, Koenraad; Reimer, Peter; Reiser, Maximilian F; Robinson, Philip J; Shamsi, Kohkan; Strotzer, Michael; Taupitz, Matthias; Tombach, Bernd; Valeri, Gianluca; van Beers, Bernhard E; Vogl, Thomas J

    2008-03-01

    A multicenter study has been employed to evaluate the diagnostic efficacy of magnetic resonance imaging (MRI) using the new liver-specific contrast agent gadoxetic acid (Gd-EOB-DTPA, Primovist), as opposed to contrast-enhanced biphasic spiral computed tomography (CT), in the diagnosis of focal liver lesions, compared with a standard of reference (SOR). One hundred and sixty-nine patients with hepatic lesions eligible for surgery underwent Gd-EOB-DTPA-enhanced MRI as well as CT within 6 weeks. Pathologic evaluation of the liver specimen combined with intraoperative ultrasound established the SOR. Data sets were evaluated on-site (14 investigators) and off-site (three independent blinded readers). Gd-EOB-DTPA was well tolerated. Three hundred and two lesions were detected in 131 patients valid for analysis by SOR. The frequency of correctly detected lesions was significantly higher on Gd-EOB-DTPA-enhanced MRI compared with CT in the clinical evaluation [10.44%; 95% confidence interval (CI): 4.88, 16.0]. In the blinded reading there was a trend towards Gd-EOB-DTPA-enhanced MRI, not reaching statistical significance (2.14%; 95% CI: -4.32, 8.6). However, the highest rate of correctly detected lesions with a diameter below 1 cm was achieved by Gd-EOB-DTPA-enhanced MRI. Differential diagnosis was superior for Gd-EOB-DTPA-enhanced MRI (82.1%) versus CT (71.0%). A change in surgical therapy was documented in 19 of 131 patients (14.5%) post Gd-EOB-DTPA-enhanced MRI. Gd-EOB-DTPA-enhanced MRI was superior in the diagnosis and therapeutic management of focal liver lesions compared with CT. PMID:18058107

  19. Value of 11C-Choline PET and Contrast-Enhanced CT for Staging of Bladder Cancer: Correlation with Histopathologic Findings

    Microsoft Academic Search

    Maria Picchio; Uwe Treiber; Ambros J. Beer; Stefan Metz; Patrick Bossner; Heiner van Randenborgh; Roger Paul; Gregor Weirich; Michael Souvatzoglou; Rudolf Hartung; Markus Schwaiger; Morand Piert

    2006-01-01

    Lymph node involvement is a major prognostic factor in bladder cancer, but the accuracy of conventional imaging modalities for the prediction of regional and distant metastatic diseases is lim- ited. This study was performed to compare the diagnostic accu- racies of contrast-enhanced CT and PET with 11C-choline for the staging of urothelial bladder cancer. Methods: Twenty-seven patients (median age, 69.1

  20. Lung in Dengue: Computed Tomography Findings

    PubMed Central

    Rodrigues, Rosana Souza; Brum, Ana Livia Garcia; Paes, Marciano Viana; Póvoa, Tiago Fajardo; Basilio-de-Oliveira, Carlos Alberto; Marchiori, Edson; Borghi, Danielle Provençano; Ramos, Grazielle Viana; Bozza, Fernando Augusto

    2014-01-01

    Background Dengue is the most important mosquito-borne viral disease in the world. Dengue virus infection may be asymptomatic or lead to undifferentiated fever, dengue fever with or without warning signs, or severe dengue. Lower respiratory symptoms are unusual and lung-imaging data in patients with dengue are scarce. Methodology/Principal Findings To evaluate lung changes associated with dengue infection, we retrospectively analyzed 2,020 confirmed cases of dengue. Twenty-nine of these patients (11 females and 18 males aged 16–90 years) underwent chest computed tomography (CT), which yielded abnormal findings in 17 patients: 16 patients had pleural effusion (the sole finding in six patients) and 11 patients had pulmonary abnormalities. Lung parenchyma involvement ranged from subtle to moderate unilateral and bilateral abnormalities. The most common finding was ground-glass opacity in eight patients, followed by consolidation in six patients. Less common findings were airspace nodules (two patients), interlobular septal thickening (two patients), and peribronchovascular interstitial thickening (one patient). Lung histopathological findings in four fatal cases showed thickening of the alveolar septa, hemorrhage, and interstitial edema. Conclusions/Significance In this largest series involving the use of chest CT to evaluate lung involvement in patients with dengue, CT findings of lower respiratory tract involvement were uncommon. When abnormalities were present, pleural effusion was the most frequent finding and lung involvement was often mild or moderate and bilateral. Extensive lung abnormalities are infrequent even in severe disease and when present should lead physicians to consider other diagnostic possibilities. PMID:24836605

  1. Ureteric stricture secondary to unusual extension of prostatic adenocarcinoma.

    PubMed

    Chalasani, Venu; Macek, Petr; O'Neill, Gordon F; Barret, Wade

    2010-02-01

    This article describes an unusual finding in a patient who presented with an adenocarcinoma of the prostate and right hydronephrosis. A 68-year-old male presented with right hydronephrosis and a PSA of 96. DRE was consistent with cT3 carcinoma. Cystoscopy showed an exophytic superficial transitional cell carcinoma (TCC) of the bladder and a transrectal biopsy of the prostate confirmed adenocarcinoma Gleason score 4+3. Staging investigations (CT pelvis and bone scan) were negative; androgen deprivation therapy was therefore initiated for the prostatic adenocarcinoma. Upper tract imaging showed multiple filling defects in the proximal ureter. Ureteroscopy showed a stricture at the level of the iliac vessels. With a working diagnosis of upper tract TCC, right open nephroureterectomy was performed. Final histology showed prostatic adenocarcinoma infiltrating the adventitia of the entire ureter up to the level of the renal pelvis. A rare cause of ureteric stricture, contiguous spread of prostatic adenocarcinoma, should be considered in the differential diagnosis of patients presenting with upper tract obstruction and a known history of prostatic adenocarcinoma. Androgen deprivation therapy for several months did not seem to cause resolution of the tumor in the periureteric, ureteric and perihilar tissues. PMID:20156388

  2. Thoracic fatty lesions - some usual and unusual appearances.

    PubMed

    Chalaoui, J; Sylvestre, J; Dussault, R G; Pinsky, M; Palayew, M J

    1981-12-01

    Since the advent of computed tomography (CT) special attention has been given to fatty lesions because of their specific coefficient of attenuation (-100 to -30 Housfield units) permitting a definitive non-interventional diagnosis. Many reports have appeared in connection with unusual conventional radiographic images related to lipid lesions as demonstrated by CT. We reviewed the different features of fatty accumulations in the thorax and report on 15 lesions, not including a number of large pleuropericardial fat pads, that we have encountered in our practice between January 1976 and December 1979. Two patients underwent surgery. The diagnosis was otherwise established by CT. All the lesions were benign. A classification is suggested. PMID:7328096

  3. CT Scans

    MedlinePLUS

    ... cross-sectional pictures of your body. Doctors use CT scans to look for Broken bones Cancers Blood clots Signs of heart disease Internal bleeding During a CT scan, you lie still on a table. The table ...

  4. Radiation therapy-induced phrenic neuropathy mimicking metastasis to the diaphragmatic crus on ą?F-FDG PET/CT.

    PubMed

    Jolepalem, Prashant; Hwang, Jane Y; Wong, C Y Oliver

    2014-03-01

    Benign unilateral uptake in the diaphragmatic crus is a relatively uncommon finding on (18)F-FDG PET/CT that can mimic the appearance of malignancy in patients with known cancer, as illustrated in this patient with neuroendocrine carcinoma. It is important for the PET interpreter to recognize this finding and attribute it to benign uptake based on the patient's history and symptoms at the time of the scan. Correlation with the findings of other available imaging modalities is also important to characterize focal uptake in unusual locations. PMID:24470595

  5. Cranial CT scan

    MedlinePLUS

    Brain CT; Head CT; CT scan - skull; CT scan - head; CT scan - orbits; CT scan - sinuses; Computed tomography - cranial ... printed on film. Three-dimensional models of the head area can be created by stacking the slices ...

  6. [CT after transsphenoidal surgery].

    PubMed

    Tazawa, S

    1991-03-25

    Two hundred and ten CT studies of 95 patients after transsphenoidal surgery were reviewed. Spheno-ethmoid opacification, intrasellar hematoma and gas bubbles were noted within 2 weeks after surgery. Bone defect of the sellar floor and bone stent were seen on coronal scans in most cases. The packing material frequently disappeared on follow-up studies. Hormonal assessment of the functioning tumor, according to which the effect of treatment was evaluated, was correlated with CT findings. Because differentiation between postoperative changes and residual mass was difficult, there was no definite CT criteria to indicate residual functioning tumor except upward convexity of the diaphragma sellae on CT more than 3 months after surgery. Initial follow up CT study is recommended to be performed at about 3 months after surgery, at which time the immediate postoperative inflammatory changes have been disappeared. The incidence of recurrence was 3/47 (6%), which was shown on follow-up CT from 4 to 10 years after surgery. Therefore subsequent CT study should be done in every year or two, taking the clinical symptoms and hormonal data into consideration. PMID:2047199

  7. Unusual fungal niches.

    PubMed

    Cantrell, S A; Dianese, J C; Fell, J; Gunde-Cimerman, N; Zalar, P

    2011-01-01

    Fungi are found in all aerobic ecosystems, colonizing a diversity of substrates and performing a wide diversity of functions, some of which are not well understood. Many spices of fungi are cosmopolitan and generalists or habitats. Unusual fungal niches are habitats where extreme conditions would be expected to prevent the development of a mycobiota. In this review we describe five unusual fungal habitats in which fungi occupy poorly understood niches: Antarctic dry valleys, high Arctic glaciers, salt flats and salterns, hypersaline microbial mats and plant trichomes. Yeasts, black yeast-like fungi, melanized filamentous species as well as representatives of Aspergillus and Penicillium seem to be dominant among the mycobiota adapted to cold and saline niches. Plant trichomes appear to be a taxa. The advent of new sequencing technologies is helping to elucidate the microbial diversity in many ecosystems, but more studies are needed to document the functional role of fungi in the microbial communities thriving in these unusual environments. PMID:21700639

  8. Unusual association of hyperkalemia and hypertension.

    PubMed

    Soppi, E; Viikari, J; Seppälä, P; Lehtonen, A; Saarinen, R; Miilunpalo, S

    1986-02-01

    We report an unusual association of hyperkalemia, mild hyperchloremic acidosis, and hypertension in a young woman. Pseudohyperkalemia, Addison's disease, renal insufficiency, classical hyporeninemic hypoaldosteronism, isolated hypoaldosteronism, and iatrogenic causes were excluded. The patient's findings were compatible with a rare syndrome designated as type II pseudohypoaldosteronism, Gordon's syndrome. PMID:2417952

  9. An Unusual Case of Perinatal Tuberous Sclerosis

    PubMed Central

    Hegde, Deeparaj Ganapati; Mondkar, Jayashree; Panchal, Harshad

    2014-01-01

    We report a case of a neonate who presented to us with multiple rhabdomyomas of heart, cortical tubers in the brain and skeletal anomalies such as Pierre Robin sequence, bilateral clubfoot and lower small bowel obstruction. Though a diagnosis of neonatal tuberous sclerosis was made, the association of skeletal anomalies and intestinal obstruction was a rare and unusual finding. PMID:25024981

  10. Identifying Unusual Galaxies

    NSDL National Science Digital Library

    In this activity, students match unusual galaxies with their distinctive names and justify their reasoning. Students discover that often, galaxies acquire their names based upon how they appear to observers. This activity includes a student worksheet and background information for the teacher. This is activity four in "The Hidden Lives of Galaxies" information and activity booklet.

  11. Comparison of Cone-Beam CT Incidental Findings between Moderate/Severe Obstructive Sleep Apnea patients and Mild/Normal patients

    PubMed Central

    Enciso, Reyes; Shigeta, Yuko; Nguyen, Manuel; Clark, Glenn T.

    2012-01-01

    Objective To compare the incidental radiographic findings in the maxillofacial structures and the pharyngeal airway between moderate/severe Obstructive Sleep Apnea (OSA) subjects and mild OSA/normal subjects using Cone-Beam Computed Tomography (CBCT) scans. Study Design 53 moderate/severe OSA subjects (with a Respiratory Disturbance Index [RDI]?15 events/hr) and 33 mild OSA/normal subjects, (RDI<15) based on ambulatory somnographic assessment were recruited. Supine CBCT’s were taken and sent for radiological report. The incidental findings were compared between the two groups. Results Moderate/severe subjects had larger prevalence of conchae bullosa, hypertrophic turbinates, hypertrophic tonsils, elongated or posteriorly placed soft palate, narrower airway, enlarged tongue, and focal calcifications, though no significant differences were found. Conclusions CBCT is useful in identifying maxillofacial and airway anomalies that could interfere with normal breathing. However, no significant difference was found in prevalence of incidental findings between moderate/severe OSA and mild/normal subjects. Further studies are necessary to generalize our results. PMID:22862979

  12. Management decisions for unusual periampullary tumors.

    PubMed

    Todd, K E; Lewis, M P; Gloor, B; Kusske, A M; Ashley, S W; Reber, H A

    1997-10-01

    The pessimism associated with the treatment of pancreatic cancer may result in inappropriate management in certain patients thought to have that disease. We analyzed the recent UCLA experience with a variety of periampullary tumors in which various issues concerning management were unusual. The records of nine patients (age 15-75 years) with pancreatic or periampullary tumors were reviewed retrospectively. The tumor was evident on CT scan in all patients. The diameter of the mass was greater than 5 cm in five cases. Eight of the tumors appeared to arise from the pancreas, but at exploration, two were found to originate from other structures (duodenum and retroperitoneum). One patient with an apparent gastric lesion on CT scan was found to have a mass of pancreatic origin at operation. Operative procedures included: pancreaticoduodenectomy (four), distal pancreatectomy (three), total pancreatectomy (one), and retroperitoneal tumor resection (one). Pathological diagnoses included: solid and papillary epithelial neoplasm (two), mucinous cystic neoplasm (two), serous microcystic adenoma (two), myositis ossificans (one), degenerative neurilemoma (one), spindle cell tumor (one), and intraductal papillary carcinoma (one). We conclude that patients with large or unusual-appearing pancreatic or periampullary tumors should be managed aggressively. Major resections can be done safely with the achievement of an excellent quality of life in individuals at the extremes of age. Unlike the usual pancreatic ductal adenocarcinoma, the prognosis for many of these neoplasms is excellent. PMID:9322675

  13. Rare and challenging extra-axial brain lesions: CT and MRI findings with clinico-radiological differential diagnosis and pathological correlation.

    PubMed

    Demir, Mustafa Kemal; Yap?c?er, Ozlem; Onat, Elif; Tokta?, Zafer Orkun; Akak?n, Ak?n; Urgun, Kamran; K?l?ç, Türker

    2014-01-01

    There are many kinds of extra-axial brain tumors and tumor-like lesions, and definitive diagnosis is complicated in some cases. In this pictorial essay, we present rare and challenging extra-axial brain lesions including neuroenteric cyst, primary leptomeningeal melanomatosis, isolated dural neurosarcoidosis, intradiploic epidermoid cyst, ruptured dermoid cyst, intraventricular cavernoma, and cavernous hemangioma of the skull with imaging findings and clinico-radiological differential diagnosis, including the pathologic correlation. Familiarity with these entities may improve diagnostic accuracy and patient management. PMID:25010368

  14. Intracranial alveolar echinococcosis: CT and MRI.

    PubMed

    Bensaid, A H; Dietemann, J L; de la Palavesa, M M; Klinkert, A; Kastler, B; Gangi, A; Jacquet, G; Cattin, F

    1994-05-01

    Intracranial alveolar echinococcosis is uncommon. We report a patient with right frontal lobe and palpebral lesions secondary to a primary hepatic focus with secondary lesion in the lung. The intracranial and palpebral cystic masses were totally removed and both proved to be alveolar hydatid cysts. An unusual feature in this case is CT and MRI demonstration of dural and bony extension. PMID:8065572

  15. Lacaziosis - unusual clinical presentation*

    PubMed Central

    de Sousa, Pétra Pereira; Schettini, Antonio Pedro Mendes; Rodrigues, Carlos Alberto Chirano; Westphal, Danielle Cristine

    2015-01-01

    Lacaziosis or Jorge Lobo's disease is a fungal, granulomatous, chronic infectious disease caused by Lacazia loboi, which usually affects the skin and subcutaneous tissue. It is characterized by slow evolution and a variety of cutaneous manifestations with the most common clinical expression being nodular keloid lesions that predominate in exposed areas. We report the case of a patient who had an unusual clinical presentation, with a single-plated lesion on the back. Histopathological examination confirmed the diagnosis of Lacaziosis.

  16. Unusual causes of pneumothorax

    PubMed Central

    Ouellette, Daniel R.; Parrish, Scott; Browning, Robert F.; Turner, J. Francis; Zarogoulidis, Konstantinos; Kougioumtzi, Ioanna; Dryllis, Georgios; Kioumis, Ioannis; Pitsiou, Georgia; Machairiotis, Nikolaos; Katsikogiannis, Nikolaos; Tsiouda, Theodora; Madesis, Athanasios; Karaiskos, Theodoros

    2014-01-01

    Pneumothorax is divided to primary and secondary. It is a situation that requires immediate treatment, otherwise it could have severe health consequences. Pneumothorax can be treated either by thoracic surgeons, or pulmonary physicians. In our current work, we will focus on unusual cases of pneumothorax. We will provide the etiology and treatment for each case, also a discussion will be made for each situation. PMID:25337394

  17. FDG PET/CT in follicular dendritic cell sarcoma with extensive peritoneal involvement.

    PubMed

    Dong, Aisheng; Wang, Yang; Zuo, Changjing

    2014-06-01

    Follicular dendritic cell sarcoma (FDCS) is a rare neoplasm that originates from follicular dendritic cells. A 33-year-old woman was referred because of a 2-month history of lower abdominal fullness. Enhanced T1-weighted MR images showed enhancement of the thickened pelvic peritoneum. FDG PET/CT was performed showing multiple FDG-avid lymph nodes in the parapharyngeal, bilateral supraclavicular, left axillary, mediastinal, and abdominal regions, and intense FDG uptake in the thickened mesentery and peritoneum. Pathologic findings of both the left supraclavicular lymph node and peritoneal biopsy specimens were consistent with high-grade FDCS. In this case, extensive peritoneal involvement by FDCS was unusual. PMID:24476636

  18. Pyogenic myositis: CT evaluation

    SciTech Connect

    Tumeh, S.S.; Butler, G.J.; Maguire, J.H.; Nagel, J.S.

    1988-11-01

    Computed tomography and gallium scintigraphy uncovered clinically occult muscle infection in eight patients. The CT findings included enlargement of the muscle, effacement of the intramuscular fat planes, fluid density, rim enhancement, and involvement of the underlying bone. Computed tomography suggested the diagnosis in seven of eight cases. Gallium scintigraphy was positive in all seven cases in which it was performed.

  19. Hepatosplenic tuberculosis with hypersplenism: CT evaluation

    Microsoft Academic Search

    Byung Ihn Choi; Jung-Gi Im; Man Chung Han; Hyo Suk Lee

    1989-01-01

    Hepatosplenic tuberculosis of macronodular form is extremely rare. We present one case of hepatosplenic tuberculosis with its appearance on computed tomography (CT). The CT findings of hepatosplenic tuberculosis were multiple, well-defined, round or ovoid, low-density masses with a range of +35 to +45 HU. Lymphadenopathy in the abdominal and mediastinal area and pleural effusion were also found. Although CT does

  20. Cancer/testis (CT) antigens, carcinogenesis and spermatogenesis

    PubMed Central

    2011-01-01

    During spermatogenesis, spermatogonial stem cells, undifferentiated and differentiated spermatogonia, spermatocytes, spermatids and spermatozoa all express specific antigens, yet the functions of many of these antigens remain unexplored. Studies in the past three decades have shown that many of these transiently expressed genes in developing germ cells are proto-oncogenes and oncogenes, which are expressed only in the testis and various types of cancers in humans and rodents. As such, these antigens are designated cancer/testis antigens (CT antigens). Since the early 1980s, about 70 families of CT antigens have been identified with over 140 members are known to date. Due to their restricted expression in the testis and in various tumors in humans, they have been used as the target of immunotherapy. Multiple clinical trials at different phases are now being conducted with some promising results. Interestingly, in a significant number of cancer patients, antibodies against some of these CT antigens were detected in their sera. However, antibodies against these CT antigens in humans under normal physiological conditions have yet to be reported even though many of these antigens are residing outside of the blood-testis barrier (BTB), such as in the basal compartment of the seminiferous epithelium and in the stem cell niche in the testis. In this review, we summarize latest findings in the field regarding several selected CT antigens which may be intimately related to spermatogenesis due to their unusual restricted expression during different discrete events of spermatogenesis, such as cell cycle progression, meiosis and spermiogenesis. This information should be helpful to investigators in the field to study the roles of these oncogenes in spermatogenesis. PMID:22319669

  1. Unusual presentation of sand aspiration in a 14-mo-old child.

    PubMed

    Arun Babu, Thirunavukkarasu; Ananthakrishnan, Shanthi

    2013-09-01

    Accidental sand aspiration is an unusual but potentially life-threatening condition in children. Sand aspiration often occurs in cases of near drowning and accidental burial in sand. The authors report a case of accidental sand aspiration in a 14-mo-old girl while she was playing with sand. Though child was symptomatic and chest radiograph was showing obstructive emphysema initially, there was spontaneous resolution of radiographic findings and clinical condition within 48 h. Child was treated conservatively and was discharged. Follow up examination after 2 mo revealed persistent wheeze but no respiratory distress. Computed tomography (CT) of thorax was done which revealed a small sand particle measuring 0.2 × 0.4 × 0.3 cm in left main bronchus and was removed via rigid bronchoscopy. This report underscores the importance of performing bronchoscopy in all cases of suspected foreign body aspirations. PMID:23212394

  2. CT Enterography

    MedlinePLUS

    ... especially children, the elderly and critically ill, all of whom may have difficulty in remaining still, even for the brief time necessary to obtain images. For some CT exams, a contrast material is used to enhance visibility in ...

  3. Unusual infections in humans.

    PubMed Central

    Neafie, R C; Marty, A M

    1993-01-01

    Nine cases of unusual infections in humans are presented. In each case, we present the clinical history, histopathologic changes (if indicated), morphologic features of the causative organism, diagnosis, discussion, differential diagnosis, therapy, and current literature. All of the cases are illustrated with pertinent photographs. The nine cases are as follows: (i) acanthocephaliasis, the first acquired human infection by Moniliformis moniliformis in the United States; (ii) dipylidiasis, an uncommon infection caused by the dog tapeworm, Dipylidium caninum; (iii) granulomatous amebic encephalitis, caused by the recently identified leptomyxid group of amebae; (iv) schistosomiasis, a dual infection of the urinary bladder with the rare presentation of both adult worms and eggs of Schistosoma haematobium and Schistosoma mansoni in tissue sections; (v) syphilitic gastritis, an uncommon presentation of Treponema pallidum infection, in a patient with an additional incidental infection by Helicobacter pylori; (vi) microsporidiosis, the only infection caused by a Pleistophora sp. in humans; (vii) sporotrichosis, a rare disseminated infection caused by Sporothrix schenckii with numerous yeast cells in the scrotum; (viii) angiostrongyliasis, the first and only infection caused by Angiostrongylus costaricensis acquired in either Puerto Rico or the United States; and (ix) botryomycosis of the skin and subcutaneous tissue, caused by gram-positive cocci with an unusually large number of granules. Images PMID:8457979

  4. Unusual infections in humans.

    PubMed

    Neafie, R C; Marty, A M

    1993-01-01

    Nine cases of unusual infections in humans are presented. In each case, we present the clinical history, histopathologic changes (if indicated), morphologic features of the causative organism, diagnosis, discussion, differential diagnosis, therapy, and current literature. All of the cases are illustrated with pertinent photographs. The nine cases are as follows: (i) acanthocephaliasis, the first acquired human infection by Moniliformis moniliformis in the United States; (ii) dipylidiasis, an uncommon infection caused by the dog tapeworm, Dipylidium caninum; (iii) granulomatous amebic encephalitis, caused by the recently identified leptomyxid group of amebae; (iv) schistosomiasis, a dual infection of the urinary bladder with the rare presentation of both adult worms and eggs of Schistosoma haematobium and Schistosoma mansoni in tissue sections; (v) syphilitic gastritis, an uncommon presentation of Treponema pallidum infection, in a patient with an additional incidental infection by Helicobacter pylori; (vi) microsporidiosis, the only infection caused by a Pleistophora sp. in humans; (vii) sporotrichosis, a rare disseminated infection caused by Sporothrix schenckii with numerous yeast cells in the scrotum; (viii) angiostrongyliasis, the first and only infection caused by Angiostrongylus costaricensis acquired in either Puerto Rico or the United States; and (ix) botryomycosis of the skin and subcutaneous tissue, caused by gram-positive cocci with an unusually large number of granules. PMID:8457979

  5. Extracolonic Findings on Computed Tomography (CT) Colonography

    ClinicalTrials.gov

    2013-01-25

    Solitary Pulmonary Nodules; Multiple Pulmonary Nodules; Renal Neoplasms; Adrenal Gland Neoplasms; Aortic Aneurysm, Abdominal; Liver Neoplasms; Adnexal and Skin Appendage Neoplasms; Lymphadenopathy; Pancreatic Neoplasms

  6. Uriniferous pseudocyst: computed tomographic findings

    SciTech Connect

    Healy, M.E.; Teng, S.S.; Moss, A.A.

    1984-12-01

    The computed tomographic (CT) scans of nine consecutive patients with proved uriniferous pseudocyst (UP) were analyzed retrospectively. Analysis disclosed perirenal space tumefaction in seven patients, tumefaction outside the perirental space in two patients, crystlike uniformity in attenuation in all nine patients. Although these CT findings appear to be quite specific, consideration of this uncommon entity in the CT differential diagnosis requires knowledge of its reported causes, the patient's medical history, and the clinical presentation.

  7. Unusual Presentation of a Metastatic Esophageal Carcinoma

    PubMed Central

    Orlicka, Katarzyna; Maynard, Stéphanie; Bouin, Mickael

    2012-01-01

    Esophageal cancer most commonly presents with upper digestive symptoms such as dysphagia. Lymph nodes are among the most common metastatic sites of this type of cancer. We report the case of a 53-year-old man presenting with unusual sole presenting features of esophageal cancer. The patient sought medical attention for abdominal pain without dysphagia, which was first investigated with an abdominal computed tomography scan. A large abdominal mass was discovered on imaging. Biopsies of this mass were in keeping with esophageal squamous cell cancer. With this finding, gastroscopy was performed, confirming the presence of primary esophageal cancer. This is a rare presentation of esophageal cancer without upper gastrointestinal symptoms. This case reinforces the value of biopsy for any neoplastic mass, especially in a context of unusual symptoms. PMID:22679417

  8. Computed tomography findings of a solitary extramedullary plasmacytoma of the spleen: A case report and literature review

    PubMed Central

    WANG, YING; YANG, LI; QIAN, ZI-HUA; ZHU, XIU-LIANG; YU, RI-SHENG

    2015-01-01

    Solitary extramedullary plasmacytoma (EMP) of the spleen is a rare condition. The present study describes the case of a 23-year-old female with an extremely rare solitary EMP of the spleen. Upon examination, the tumor demonstrated unusual and notable multiple-phase spiral computed tomography (CT) findings. The lesion was a solitary, well-defined mass, with areas of variable splenic necrosis and cystic degeneration. Contrast-enhanced CT revealed progressive enhancement of the lesion in the cystic wall, internal septa and solid portion, a finding that has not previously been described. The patient underwent a splenectomy and recovered without complications. No evidence of tumor recurrence has occurred during the past two years of follow-up. To the best of our knowledge, this is the first study to examine the CT findings of a solitary EMP of the spleen. The study aimed to investigate the imaging features of solitary EMP, in particular the multiple-phase spiral CT findings, and raise awareness of the disease to reduce misdiagnoses. PMID:25435962

  9. Atypical distribution of small nodules on high resolution CT studies: patterns and differentials.

    PubMed

    Marchiori, Edson; Zanetti, Gláucia; Barreto, Miriam Menna; de Andrade, Flávio Teixeira Azeredo; Rodrigues, Rosana Souza

    2011-09-01

    Accurate diagnosis of lung disease with high resolution CT is challenging and relies on a pattern-based approach coupled with knowledge of the distribution of the abnormalities in the lung parenchyma. Some findings and distributions of small nodules are specific for certain diseases, but atypical patterns have been described, especially for granulomatous diseases such as sarcoidosis and tuberculosis. Unusual HRCT aspects that involve the coalescence of small nodules have been termed the "sarcoid galaxy sign" and the "sarcoid cluster sign". Other imaging findings such as the "reversed halo sign" and the "fairy ring sign" can also be composed of small nodules. The aim of this review was to describe and illustrate a range of conditions that manifest with atypical distribution of small nodules on HRCT. We discuss the various aspects, associated findings, and differential diagnosis particularly in sarcoidosis and tuberculosis. PMID:21377343

  10. CT Scans

    Cancer.gov

    An arm or chest radiograph looks all the way through a body without being able to tell how deep anything is. A CT scan is three-dimensional. By imaging and looking at several three-dimensional slices of a body (like slices of bread) a doctor could not only tell if a tumor is present, but roughly how deep it is in the body.

  11. Kaposi sarcoma in unusual locations

    PubMed Central

    Pantanowitz, Liron; Dezube, Bruce J

    2008-01-01

    Kaposi sarcoma (KS) is a multifocal, vascular lesion of low-grade malignant potential that presents most frequently in mucocutaneous sites. KS also commonly involves lymph nodes and visceral organs. This article deals with the manifestation of KS in unusual anatomic regions. Unusual locations of KS involvement include the musculoskeletal system, central and peripheral nervous system, larynx, eye, major salivary glands, endocrine organs, heart, thoracic duct, urinary system and breast. The development of KS within wounds and blood clots is also presented. KS in these atypical sites may prove difficult to diagnose, resulting in patient mismanagement. Theories to explain the rarity and development of KS in these unusual sites are discussed. PMID:18605999

  12. Localized peribronchial thickening: a CT sign of occult bronchogenic carcinoma

    SciTech Connect

    Foster, W.L. Jr.; Roberts, L. Jr.; McLendon, R.E.; Hill, R.C.

    1985-05-01

    The authors present a case with repeated positive sputum cytologies in which CT proved complementary to nonlocalizing endoscopies by identifying bronchogenic carcinoma as focal specimen provided precise pathologic correlation of the CT findings with a small squamous cell carcinoma.

  13. Rare case of urinary bladder agenesis - Multislice CT abdomen imaging

    PubMed Central

    Indiran, Venkatraman; Chokkappan, Kabilan; Gunaseelan, Emmanuel

    2013-01-01

    Complete agenesis of urinary bladder is an extremely rare anomaly with only a few live cases reported so far. In most of the instances death occurs early as it may be incompatible with life. Here we report a case of adolescent female with urinary bladder and unilateral renal agenesis, who presented with a rather unusual presentation of incontinence, for a computed tomography (CT) examination. Other congenital abnormalities visualised in the CT abdomen are also discussed. PMID:23705039

  14. An unusual ophthalmic finding in Lane-Hamilton syndrome.

    PubMed

    Villegas, Victor M; Rachitskaya, Aleksandra V; Lam, Byron L; McKeown, Craig A; Berrocal, Audina M

    2014-12-01

    Lane-Hamilton syndrome is a rare condition that is characterized by idiopathic pulmonary hemosiderosis and celiac disease. We report the case of an 18-month-old girl with Lane-Hamilton syndrome who had unilateral pigmentary retinopathy. PMID:25448145

  15. The black thyroid: an unusual finding during neck exploration.

    PubMed Central

    Noble, J. G.; Christmas, T. J.; Chapple, C.; Katz, D.; Milroy, E. J.

    1989-01-01

    Black thyroid discolouration has been reported in post-mortem examinations on patients who have previously taken minocycline. The discovery of this phenomenon during neck exploration and a review of the possible mechanism of black thyroid discolouration are discussed in this paper. Images Figure 1 Figure 2 PMID:2780449

  16. Chronic idiopathic hyperphosphatasia with unusual dental findings - A case report

    PubMed Central

    Sreejan, Cheriya K.; Gopakumar, Nair; Subhas Babu, Gogineni

    2012-01-01

    Chronic idiopathic hyperphosphatasia(CIH) or juvenile Paget disease is believed to be a distinct disease characterized by an increase in the serum alkaline phosphatase, cortical thickening and bowing of the long bones, especially the femora. It is a rare autosomal recessive bone disorder, with excessive bone resorption and bone formation. Skeletal malformations in the legs may cause problems in walking and may eventually result in short stature. The radiographic appearances include widening of the diaphyses, vertebral osteoporosis, acetabular protrusion, and thickening of the skull vault. Intensive bisphosphonate treatment prevented the development of deformity and disability but there is no published data on long-term efficacy. Bisphosphonate therapy showed suppression of bone turnover, doubling of trabecular thickness with no mineralization defect, and no osteopetrosis. We report a female of 21 years, a case of chronic idiopathic hyperphosphatasia congenital form, with a history of fracture, short stature and malformed teeth. She had a waddling gait, bone deformities, kyphoscoliosis and curvature of her limbs. Key words:Hyperphosphatasia, autosomal recessive, alkaline phosphatase, short stature, cortical thickening, enamel hypoplasia. PMID:24455042

  17. Inflammatory myofibroblastic tumor of the lung: unusual imaging findings.

    PubMed

    Pavithran, K; Manoj, P; Vidhyadharan, G; Shanmughasundaram, P

    2013-09-01

    Inflammatory myofibroblastic tumor (IMT) is a rare neoplasm, most commonly seen in children and adolescents. It can occur in nearly every part of the body. Imaging properties and the clinical presentation of IMT can mimic malignant process. A 41-year-old female presented with cough of 3 months duration. Chest X-ray showed a coin shadow in the right upper lobe. Positron emission tomography/computed tomography scan showed a 3.2 × 2.4 cm lesion with homogeneous appearance with a very high fluorodeoxyglucose uptake value, suggesting a neoplastic process. She underwent lobectomy and the final diagnosis was IMT. PMID:25165425

  18. Inflammatory Myofibroblastic Tumor of the Lung: Unusual Imaging Findings

    PubMed Central

    Pavithran, K.; Manoj, P.; Vidhyadharan, G.; Shanmughasundaram, P.

    2013-01-01

    Inflammatory myofibroblastic tumor (IMT) is a rare neoplasm, most commonly seen in children and adolescents. It can occur in nearly every part of the body. Imaging properties and the clinical presentation of IMT can mimic malignant process. A 41-year-old female presented with cough of 3 months duration. Chest X-ray showed a coin shadow in the right upper lobe. Positron emission tomography/computed tomography scan showed a 3.2 × 2.4 cm lesion with homogeneous appearance with a very high fluorodeoxyglucose uptake value, suggesting a neoplastic process. She underwent lobectomy and the final diagnosis was IMT. PMID:25165425

  19. Experiments with Unusual Oxidation States

    ERIC Educational Resources Information Center

    Kauffman, G. B.

    1975-01-01

    Describes four synthesis experiments, adapted for the general chemistry laboratory, in which compounds in unusual oxidation are prepared. The abnormal oxidation states involved in the synthesis products are: silver (II), chromium (II), lead (IV), and bromine (I). (MLH)

  20. Pseudohemangioma of the Vertebra: An Unusual Radiographic Manifestation of Primary Ewing's Sarcoma

    Microsoft Academic Search

    Joshua A. Bemporad; Gordon Sze; John C. Chaloupka; Charles Duncan

    1999-01-01

    Summary: Primary Ewing's sarcoma (ES) of the spine is uncommon, exhibiting a variety of appearances on plain- film radiographs and cross-sectional images. We report the unusual CT imaging manifestations of a primary ES with a coarse trabecular pattern that mimicked an aggressive hemiangioma of the cervical spine. Ewing's sarcoma (ES) is an aggressive malignant neoplasm accounting for 6% to 8%

  1. Unusual causes of mesenteric ischemia.

    PubMed

    Krupski, W C; Selzman, C H; Whitehill, T A

    1997-04-01

    Although complications of generalized atherosclerosis most commonly cause intestinal ischemia, a number of unusual causes may be responsible. These unusual causes can be grouped into six major categories: (1) mechanical, (2) drugs, (3) hematologic, (4) endocrine, (5) vasculopathies, and (6) miscellaneous. Morbidity and mortality rates remain high because these rare diseases frequently go unrecognized until patients suffer adverse outcomes. A high index of suspicion may decrease the delay in diagnosis of mesenteric ischemia caused by these disorders. PMID:9146726

  2. Sphingomonas paucimobilis: an unusual cause of meningitis-case report.

    PubMed

    Tai, Mei-Ling Sharon; Velayuthan, Rukumani Devi

    2014-01-01

    Sphingomonas paucimobilis is an aerobic gram-negative bacillus. The bacteria can cause infections, which can be devastating and, therefore, the patients need adequate and early antibiotic cover. We are presenting an interesting case of meningitis secondary to an unusual S. paucimobilis infection. This is the second case to our knowledge in the literature on meningitis due to S. paucimobilis. The 31-year-old previously healthy man presented with 2 months' history of weight loss and loss of appetite. He had fever and headache for 3 weeks. He was also speaking irrelevantly for 3 weeks. He had change of behaviour for 1 day. The patient was a farmer and worked in the soil. On examination, he was not responding to questions and was not obeying commands. Computed tomography (CT) brain with contrast revealed meningeal enhancement and cerebral oedema. Lumbar puncture was performed. Cerebrospinal fluid (CSF) opening pressure was more than 50 cm H2O. CSF analysis showed meningitis picture with raised white cell count of 210/?L (predominantly neutrophils), glucose 3.1 mmol/L, and raised protein 2.47 g/L. He was given intravenous ceftriaxone. The following day, his condition deteriorated. CSF culture grew S. paucimobilis sensitive to ceftriaxone. S. paucimobilis causes severe meningitis. This can lead to hydrocephalus, which results in a need for extraventricular drainage. A good occupational history is important with regard to finding the aetiology of serious meningitis (including rare bacteria) even before the culture result is known. Appropriate treatment can be given early and adequately to prevent mortality. PMID:24201101

  3. Midgut carcinoid tumours. CT appearance.

    PubMed

    Sugimoto, E; Lörelius, L E; Eriksson, B; Oberg, K

    1995-07-01

    CT was performed on 80 patients referred for staging and treatment of histologically verified midgut carcinoid tumours. In 17 cases (21%) CT was normal in spite of biochemical signs of tumour (increased U-5-HIAA). The most common finding was liver metastases in 54/80 (68%) of patients. Mesenteric metastases, usually as a soft tissue mass at the mesenteric root, were found in 17/80 (21%). Retroperitoneal adenopathy was found in 19/80 (24%). During a follow-up time of 3 months to 10 years (median 3 years) 445 additional CT examinations were performed on 77 patients. In 39 of these, progressive disease (new lesions) was found after a median time of 15 months (range 3 months-6.5 years). CT is poor in detecting primary carcinoid tumours but helpful in evaluating the extent of tumour spread before surgical exploration and during follow-up once the diagnosis has been established. PMID:7619613

  4. Facial palsy: unusual etiology.

    PubMed

    Breadon, G E; Cody, D T; Weiland, L H

    1977-01-01

    This is a report of three patients who presented at the Mayo Clinic over a two-year period. All were initially diagnosed as having Bell's palsy but were later found to have a malignant neoplasm causing the paralysis. Two of the patients had breast carcinoma metastases involving the mastoid portion of the facial nerve. The third patient had an adenocarcinoma of the deep lobe of the parotid that involved the facial nerve distal to the stylomastoid foramen. The course of the facial paralysis in the two patients with the metastitic breast disease was almost identical. It consisted of episodes of pain in the mastoid area. generally in the late evening or during the night, often awakening the patient from sleep. This was then followed by peripheral facial-nerve paralysis, sometimes partial and at other times complete. These episodes lasted from 10 minutes to several hours and then resolved completely. They recurred over several months. The patients were completely asymptomatic and normal on examination in the intervals between episodes of paralysis until it became permanent. Metastatic lesions causing facial paralysis are extremely rare in the literature. In those cases that have been reported, the paralysis was progressive from the start and in the vast majority of cases was either painless or associated with other aural symptoms such as otorrhea, hearing loss, and periauricular swelling. There are two unusual features of these two cases: 1. the initial presentation of a breast metastasis as a facial paralysis; in the first case there were no other metastatic lesions present at diagnosis, whereas the second patient had other, asymptomatic, metastatic nodules; and 2. the multiple, brief, recurring episodes of facial paralysis, which have not previously been reported as a mode of presentation of metastitic disease. The third patient was diagnosed as having Bell's palsy. A facial nerve decompression was performed, and the nerve apparently looked normal. The paralysis failed to resolve. He was later found to have adenocarcinoma of the deep lobe of the parotid that involved the facial nerve distal to the stylomastoid foramen. A report of only one similar case could be found in the literature. The sequence of events in these three cases emphasizes the importance of submitting a patient suspected of having Bell's palsy to a thorough otoneurologic examination. PMID:831048

  5. An unusual presentation of diabetic amyotrophy: myoclonus

    PubMed Central

    Zaidi, Syed Amir; Chhetri, Suresh Kumar; Lekwuwa, Godwin; Majeed, Tahir

    2013-01-01

    Diabetic amyotrophy is a distinctive form of diabetic neuropathy. It is characterised by a weakness and wasting of proximal muscles of the lower limbs with associated pain. We report a case of an elderly patient with unusual presentation of diabetic amyotrophy. He presented with myoclonic jerks and recurrent falls. Examination findings and electrophysiological studies were consistent with a diagnosis of diabetic amyotrophy. He responded well to steroids with marked improvement in strength of the lower limb muscles and complete resolution of myoclonic jerks. Diabetic amyotrophy presenting as myoclonic jerks has been rarely reported before. PMID:23386493

  6. Adenoid cystic carcinoma: An unusual presentation.

    PubMed

    Pushpanjali, M; Sujata, D Naga; Subramanyam, S Bala; Jyothsna, M

    2014-05-01

    The adenoid cystic carcinoma is a relatively rare epithelial tumor of the major and minor salivary glands, accounting for about 1% of all malignant tumor of the oral and maxillofacial regions. Peak incidence occurs between the 5(th) and 6(th) decades of life. The clinical and pathological findings typical of this tumor include slow growth, peri-neural invasion, multiple local recurrences and distant metastasis. Herein, we report a case of adenoid cystic carcinoma of oropharynx with unusual clinical presentation. The diagnosis of this case and importance of cytology in diagnosing such cases is discussed. PMID:25328314

  7. 78 FR 15597 - Special Conditions: GE Aviation CT7-2E1 Turboshaft Engine Model

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-12

    ...Special Conditions: GE Aviation CT7-2E1 Turboshaft Engine Model AGENCY: Federal Aviation Administration...for the General Electric Aviation (GE) CT7-2E1 engine model. This engine model will have a novel or unusual design...

  8. Diverticular abscess presenting as prostate abscess and missed by abdominal CT scan

    Microsoft Academic Search

    R. Giuseppi Slater

    2002-01-01

    This is a case report of sigmoid diverticular abscess presenting as prostate abscess. Helical computed tomography (CT) scan revealed the prostate abscess but failed to demonstrate the underlying diverticular abscess. Colonic diverticular abscess can have many unusual presentations, and multiple imaging modalities may be required to reveal the underlying pathology. Abdominal CT scan is not always a definitive and absolute

  9. 111 Single centre prospective cardiac CT study to determine the prevalence of patients with coronary artery disease with a zero coronary artery calcium score and associated non-cardiac incidental findings

    Microsoft Academic Search

    A J Shah; D R Obaid; D Gopalan; J Babar; J H F Rudd

    2011-01-01

    IntroductionCardiac CT, incorporating coronary artery calcium (CAC) scoring and angiography, is being increasingly used to evaluate patients with chest pain and exclude coronary artery disease (CAD), as recommended in the recent NICE guidelines. Calcification of the coronary arteries is an excellent marker of underlying atherosclerosis, but a zero CAC score does not completely exclude the diagnosis as potentially significant non-calcified

  10. CT demonstration of bilateral adrenal hemorrhage

    SciTech Connect

    Ling, D.; Korobkin, M.; Silverman, P.M.; Dunnick, N.R.

    1983-08-01

    Bilateral adrenal hemorrhage with subsequent adrenal insufficiency is a recognized complication of anticoagulant therapy. Because the clinical manifestations are often nonspecific, the antemortem diagnosis of adrenal hemorrhage has been a difficult clinical problem. Computed tomography (CT) provides detailed images of the adrenal glands that are not possible with conventional imaging methods. The CT findings of bilateral adrenal hemorrhage in an anticoagulated patient are reported.

  11. An Unusual Exponential Graph

    NASA Astrophysics Data System (ADS)

    Syed, M. Qasim; Lovatt, Ian

    2014-05-01

    This paper is an addition to the series of papers on the exponential function begun by Albert Bartlett. In particular, we ask how the graph of the exponential function y =e-t/? would appear if y were plotted versus ln t rather than the normal practice of plotting ln y versus t. In answering this question, we find a new way to interpret the mean life (or time constant) ? using such a linear-log graph.

  12. An Unusual Exponential Graph

    ERIC Educational Resources Information Center

    Syed, M. Qasim; Lovatt, Ian

    2014-01-01

    This paper is an addition to the series of papers on the exponential function begun by Albert Bartlett. In particular, we ask how the graph of the exponential function y = e[superscript -t/t] would appear if y were plotted versus ln t rather than the normal practice of plotting ln y versus t. In answering this question, we find a new way to…

  13. Unusual fibularis (peroneus) muscle.

    PubMed

    Fabrizio, Philip A

    2014-11-28

    Routine dissection has identified a previously unrecorded fibularis (peroneus) muscle in a 74-year-old male cadaver. The anomalous fibularis muscle was found lying immediately antero-medial to the fibularis longus (FL) muscle of the left leg. The anomalous muscle arose from the muscle belly of the FL in the proximal 1/2 of the leg. The muscle belly gave way to a long slender tendon that continued distally behind the lateral malleolus and inserted onto the superficial aspect of the inferior fibular retinaculum. The current finding and clinical significance are discussed. PMID:25431295

  14. Intracranial vascular malformations: MR and CT imaging

    SciTech Connect

    Kucharczyk, W.; Lemme-Pleghos, L.; Uske, A.; Brant-Zawadzki, M.; Dooms, G.; Norman, D.

    1985-08-01

    Twenty-four patients with 29 cerebrovascular malformations were evaluated with a combination of computed tomography (CT), angiography, and magnetic resonance (MR) imaging. Characteristics of the malformations on MR images were reviewed retrospectively, and a comparative evaluation of MR and CT images was made. Of 14 angiographically evident malformations, 13 intra-axial lesions were detected on both CT and MR images, and one dural malformation gave false-negative results on both modalities. The appearance of parenchymal lesions on MR images closely mirrored characteristic CT findings. Angiographically evident malformations have a highly characteristic appearance on MR images. MR may be more sensitive than CT in the detection of small hemorrhagic foci associated with cryptic arteriovenous malformations and may add specificity in the diagnosis of occult malformations in some cases, but MR is less sensitive than CT for the detection of small calcified malformations.

  15. An Unusual Case of Bilateral Granulomatous Mastitis

    PubMed Central

    Pistolese, C. A.; Di Trapano, R.; Girardi, V.; Costanzo, E.; Di Poce, I.; Simonetti, G.

    2013-01-01

    Idiopathic granulomatous mastitis (IGM) is an uncommon benign disorder of the breast. At clinical examination, IGM is characterized by an inflammatory process of the breast, usually unilateral. Possible clinical findings are palpable mass with erythematous skin, pain, sterile abscesses, fistula and nipple retraction. Mammography and ultrasound findings are not specific for IGM. Magnetic resonance imaging (MRI) is a useful tool for the differential diagnosis; it is also necessary to delineate the exact extension of the disease and to plan the correct treatment. Final diagnosis is histological. We described an unusual case of IGM with bilateral involvement in a patient with history of pacemaker implantation and IGM typical clinical symptoms. Mammography, ultrasound, and MRI examinations were performed to identify the inflammatory disorder and to plan the correct therapy. Imaging features were correlated with final histological diagnosis of IGM. PMID:23781373

  16. Three cases of an unusual foreign body in small bowel

    Microsoft Academic Search

    Maha M. Guindi; Michael M. Troster; Virginia M. Walley

    1987-01-01

    The inadvertent ingestion of foreign bodies is an infrequent occurrence in adults. Three cases of an unusual form of foreign body ingestion are reported here. In each case the foreign body recovered was a plastic bag clip, found attached to the small bowel mucosa. The radiographic appearances of this foreign body are demonstrated, and the pathologic findings related to its

  17. CT characteristics of ovarian dysgerminoma

    Microsoft Academic Search

    Xiaoping Yu

    2008-01-01

    Objective  To study the CT features of ovarian dysgerminoma.\\u000a \\u000a \\u000a \\u000a Methods  CT findings of 11 cases with pathologically- proved dysgerminoma of ovary were retrospectively analyzed.\\u000a \\u000a \\u000a \\u000a Results  All the 11 cases were solitary. The maximum diameter of lesion was averagely 17.1 cm. The tumor presented as a solid (n = 8) or cystic-solid (n = 3) mass. After contrast medium administration, the solid component of

  18. Evolution of IPv6 Internet topology with unusual sudden changes

    NASA Astrophysics Data System (ADS)

    Ai, Jun; Zhao, Hai; Kathleen, M. Carley; Su, Zhan; Li, Hui

    2013-07-01

    The evolution of Internet topology is not always smooth but sometimes with unusual sudden changes. Consequently, identifying patterns of unusual topology evolution is critical for Internet topology modeling and simulation. We analyze IPv6 Internet topology evolution in IP-level graph to demonstrate how it changes in uncommon ways to restructure the Internet. After evaluating the changes of average degree, average path length, and some other metrics over time, we find that in the case of a large-scale growing the Internet becomes more robust; whereas in a top—bottom connection enhancement the Internet maintains its efficiency with links largely decreased.

  19. Comparison of SPECT/CT, MRI and CT in diagnosis of skull base bone invasion in nasopharyngeal carcinoma.

    PubMed

    Zhang, Shu-xu; Han, Peng-hui; Zhang, Guo-qian; Wang, Rui-hao; Ge, Yong-bin; Ren, Zhi-gang; Li, Jian-sheng; Fu, Wen-hai

    2014-01-01

    Early detection of skull base invasion in nasopharyngeal carcinoma (NPC) is crucial for correct staging, assessing treatment response and contouring the tumor target in radiotherapy planning, as well as improving the patient's prognosis. To compare the diagnostic efficacy of single photon emission computed tomography/computed tomography (SPECT/CT) imaging, magnetic resonance imaging (MRI) and computed tomography (CT) for the detection of skull base invasion in NPC. Sixty untreated patients with histologically proven NPC underwent SPECT/CT imaging, contrast-enhanced MRI and CT. Of the 60 patients, 30 had skull base invasion confirmed by the final results of contrast-enhanced MRI, CT and six-month follow-up imaging (MRI and CT). The diagnostic efficacy of the three imaging modalities in detecting skull base invasion was evaluated. The rates of positive findings of skull base invasion for SPECT/CT, MRI and CT were 53.3%, 48.3% and 33.3%, respectively. The sensitivity, specificity and accuracy were 93.3%, 86.7% and 90.0% for SPECT/CT fusion imaging, 96.7%, 100.0% and 98.3% for contrast-enhanced MRI, and 66.7%, 100.0% and 83.3% for contrast-enhanced CT. MRI showed the best performance for the diagnosis of skull base invasion in nasopharyngeal carcinoma, followed closely by SPECT/CT. SPECT/CT had poorer specificity than that of both MRI and CT, while CT had the lowest sensitivity. PMID:24212004

  20. Unidentified phenomena - Unusual plasma behavior?

    NASA Astrophysics Data System (ADS)

    Avakian, S. V.; Kovalenok, V. V.

    1992-06-01

    The paper describes observations of a phenomenon belonging to the UFO category and the possible causes of these events. Special attention is given to an event which occurred during the night of September 19-20, 1974, when a huge 'star' was observed over Pertrozavodsk (Russia), consisting of a bright-white luminous center, emitting beams of light, and a less bright light-blue shell. The star gradually formed a cometlike object with a tail consisting of beams of light and started to descend. It is suggested that this event was related to cosmic disturbances caused by an occurrence of unusually strong solar flares. Other examples are presented that relate unusual phenomena observed in space to the occurrence of strong magnetic turbulence events.

  1. Imaging Findings of Gastric Diverticula

    PubMed Central

    Schramm, Dominik; Bach, Andreas Gunter; Zipprich, Alexander; Surov, Alexey

    2014-01-01

    Introduction. Gastric diverticula (GD) are very rare. Computer tomographic findings in GD have been reported only as case reports previously. The aim of this study was to estimate the prevalence of GD on computed tomography (CT) and to analyze their radiological appearances. Materials and Methods. From 2006 to 2013, a total of 14,428 patients were examined by abdominal/thoracic CT at our institution. GD were diagnosed in 18 (0.12%) patients (13 women and 5 men, median age, 64 years). In 9 patients, additional endoscopy and in 7 patients upper gastrointestinal investigation with contrast medium were performed. Magnetic resonance imaging (MRI) was available for 3 cases. Results. In all patients GD were diagnosed incidentally during CT examination. The diverticula were located at the posterior wall of the gastric fundus below the esophagogastric junction. On CT, GD presented as cystic lesions with a thin wall and an air fluid level, located behind the stomach between spleen, adrenal gland, and crus of the left diaphragm. Conclusion. The prevalence of GD encountered in our CT series is 0.12%. GD demonstrate typical CT appearances, namely, cystic lesions located in the left paravertebral region. The radiologist should be familiar with this finding to avoid possible misinterpretations. PMID:25401160

  2. Cavitary Pulmonary Metastases: CT Features and Their Correlation with the Pathology of the Primary Malignancy

    Microsoft Academic Search

    Xiaoping Yu; Ping Wang; Zhaoyu Liang

    2004-01-01

    To study CT features of cavitary pulmonary metastases and to investigate the possible relationship between CT features and the pathology of the primary lesions. CT findings of 131 cavitary metastatic nodules in 40 patients with pathologically-proved pulmonary metastases were retrospectively analyzed. A comparison between CT signs and the pathologic types of the primary tumors was made. Cavitary metastases and multiple

  3. Unusual presentation of cutaneous leiomyoma.

    PubMed

    Bhaskar, Sapnashree; Jaiswal, Ashok K; Madhu, Sm; Santosh, Kv

    2014-11-01

    Herein, we report a case of leiomyoma cutis because of its rarity and unusual presentation. The case presented with a solitary leiomyoma lesion which was painless. However, the adjacent normal appearing area was tender. A biopsy of the lesion as well as of a portion of the adjacent normal appearing area was taken, which confirmed the diagnosis of cutaneous leiomyoma. This may suggest the dormant nature of the disease which has not yet become apparent. PMID:25484434

  4. Aggressive angiomyxoma: an unusual presentation.

    PubMed

    Geng, Junzu; Cao, Bofeng; Wang, Liping

    2012-01-01

    Aggressive angiomyxoma is an uncommon mesenchymal myxoid tumor that is characterized by slow growth and frequent local recurrence. It is currently regarded as a nonmetastasizing tumor. We describe a case of recurrent aggressive angiomyxoma with invasion into the veins including the inferior vena cava and the right atrium and with pulmonary metastases. Our case, together with those unusual cases documented in previous reports, may lead to a reappraisal of the nature of aggressive angiomyxoma. PMID:22247641

  5. Star Library: An Unusual Episode

    NSDL National Science Digital Library

    Richardson, Mary

    2003-03-17

    Created by Mary Richardson of Grand Valley State University, this article describes an activity that illustrates contingency table (two-way table) analysis. Students use contingency tables to analyze the "Â?Â?unusual episode" (the sinking of the ocean liner Titanic) data (from Dawson, 1995) and attempt to use their analysis to deduce the origin of the data. The activity is appropriate for use in an introductory college statistics course or in a high school AP statistics course.

  6. Unusual Presentation of Cutaneous Leiomyoma

    PubMed Central

    Bhaskar, Sapnashree; Jaiswal, Ashok K; Madhu, SM; Santosh, KV

    2014-01-01

    Herein, we report a case of leiomyoma cutis because of its rarity and unusual presentation. The case presented with a solitary leiomyoma lesion which was painless. However, the adjacent normal appearing area was tender. A biopsy of the lesion as well as of a portion of the adjacent normal appearing area was taken, which confirmed the diagnosis of cutaneous leiomyoma. This may suggest the dormant nature of the disease which has not yet become apparent. PMID:25484434

  7. An unusual case of pneumocephalus.

    PubMed

    Bhogal, P; Bhatnagar, G; Manieson, J; Booth, T; Prendergast, C

    2011-01-01

    The authors present an unusual cause of pneumocephalus in a previously fit and well female octogenarian who presented with acute onset altered level of consciousness and generalised weakness. Radiological imaging demonstrated widespread cerebritis with pneumocephalus and gas within the superior sagittal sinus. Blood culture grew Clostridium septicum, a virulent but rare organism that can infect normal tissues. The close association between C septicum and both haematological and bowel malignancies must be considered if this organism is cultured. PMID:22673713

  8. Unusual manifestations of hereditary angioedema.

    PubMed

    Neri, S; Ierna, D; Sfogliano, L

    2000-06-01

    Hereditary angioedema is a hereditary disorder transmitted as an autosomal dominant trait, characterized by reduced plasma concentration of C1 esterase inhibitor (type 1) or the presence of non functional C1 esterase inhibitor (type 2). We describe and discuss the case of a 35-year-old man who presented two unusual clinical manifestations of type 2 hereditary angioedema causing diverse emergency situations: acute abdomen and parasellar oedema. PMID:11132070

  9. Preoperative evaluation of colorectal cancer using CT colonography, MRI, and PET/CT

    PubMed Central

    Kijima, Shigeyoshi; Sasaki, Takahiro; Nagata, Koichi; Utano, Kenichi; Lefor, Alan T; Sugimoto, Hideharu

    2014-01-01

    Imaging studies are a major component in the evaluation of patients for the screening, staging and surveillance of colorectal cancer. This review presents commonly encountered findings in the diagnosis and staging of patients with colorectal cancer using computed tomography (CT) colonography, magnetic resonance imaging (MRI), and positron emission tomography (PET)/CT colonography. CT colonography provides important information for the preoperative assessment of T staging. Wall deformities are associated with muscular or subserosal invasion. Lymph node metastases from colorectal cancer often present with calcifications. CT is superior to detect calcified metastases. Three-dimensional CT to image the vascular anatomy facilitates laparoscopic surgery. T staging of rectal cancer by MRI is an established modality because MRI can diagnose rectal wall laminar structure. N staging in patients with colorectal cancer is still challenging using any imaging modality. MRI is more accurate than CT for the evaluation of liver metastases. PET/CT colonography is valuable in the evaluation of extra-colonic and hepatic disease. PET/CT colonography is useful for obstructing colorectal cancers that cannot be traversed colonoscopically. PET/CT colonography is able to localize synchronous colon cancers proximal to the obstruction precisely. However, there is no definite evidence to support the routine clinical use of PET/CT colonography. PMID:25493009

  10. Unusual complications of incisional hernia.

    PubMed

    Emegoakor, Cd; Dike, Ei; Emegoakor, Fc

    2014-11-01

    Incisional hernia represents a breakdown or loss of continuity of a fascial closure. These hernias are of particular concern not only for the high recurrence rates among them but also for the challenges that follow their repair. It is known to occur in 11-23% of laparotomies. This paper presents two unusual complications of incisional hernia managed by the authors. One ruptured incisional hernia with evisceration of gut and a case of incarcerated gravid uterus in a woman in labour. The case records of the two patients with unusual complications of incisional hernia were pooled and presented to highlight the clinical presentation and management options of this condition. The patient with ruptured hernia and eviscerated gut presented immediately and was resuscitated and the hernia repaired with polypropylene mesh. The patient with incarcerated uterus had caesarean section and mesh repair of the hernia. Incisional hernia can present with unusual complications. The management is very challenging. Good knowledge and skills are required to deal with this condition. PMID:25506498

  11. Unusual Complications of Incisional Hernia

    PubMed Central

    Emegoakor, CD; Dike, EI; Emegoakor, FC

    2014-01-01

    Incisional hernia represents a breakdown or loss of continuity of a fascial closure. These hernias are of particular concern not only for the high recurrence rates among them but also for the challenges that follow their repair. It is known to occur in 11-23% of laparotomies. This paper presents two unusual complications of incisional hernia managed by the authors. One ruptured incisional hernia with evisceration of gut and a case of incarcerated gravid uterus in a woman in labour. The case records of the two patients with unusual complications of incisional hernia were pooled and presented to highlight the clinical presentation and management options of this condition. The patient with ruptured hernia and eviscerated gut presented immediately and was resuscitated and the hernia repaired with polypropylene mesh. The patient with incarcerated uterus had caesarean section and mesh repair of the hernia. Incisional hernia can present with unusual complications. The management is very challenging. Good knowledge and skills are required to deal with this condition. PMID:25506498

  12. CT during arterial portography.

    PubMed

    Soyer, P

    1996-01-01

    CT during arterial portography (CTAP) is based on portal enhancement of the liver by infusion of contrast material through the superior mesenteric or splenic artery. This technique provides high degrees of enhancement of the portal vein and intrahepatic vessels, allowing reliable segmental localisation of tumours and accurate assessment of relationships between tumours and intrahepatic vessels. Because of its invasiveness, CTAP must be limited to patients for whom non-invasive preoperative imaging suggests resectable tumour. In the majority of cases, CTAP is performed in patients with hepatic metastases from colorectal cancer, but other types of hepatic tumour (either primary or secondary) and pancreatic tumour may be an indication for CTAP. Visualisation of non-tumorous perfusion defects is a limitation of this technique, but such defects have been well described and have characteristic locations and appearance. In difficult cases, correlation with sonographic, CT and MRI findings helps characterise portal perfusion defects. CTAP is the most sensitive technique for the detection of intrahepatic tumours, and the recent use of spiral technology shows promise in the performance of CTAP. CTAP data can be viewed as multiplanar and three-dimensional reconstructions that allow preoperative planning of the extent of resection and determination of the volume of the remaining liver after resection. PMID:8798005

  13. The yield of SPECT\\/CT for anatomical lymphatic mapping in patients with breast cancer

    Microsoft Academic Search

    Iris M. C. van der Ploeg; Omgo E. Nieweg; Bin B. R. Kroon; Emiel J. T. Rutgers; Marie-Jeanne T. F. D. Baas-Vrancken Peeters; Wouter V. Vogel; Cornelis A. Hoefnagel; Renato A. Valdés Olmos

    2009-01-01

    Purpose  The recently introduced hybrid single-photon emission computed tomography camera with integrated CT (SPECT\\/CT) fuses tomographic\\u000a lymphoscintigrams with anatomical data from CT. The purpose of this study was to explore this sophisticated technique in lymphatic\\u000a mapping in breast cancer patients.\\u000a \\u000a \\u000a \\u000a Methods  We studied 134 patients who underwent SPECT\\/CT immediately after late planar imaging when these images showed an unusual drainage\\u000a pattern (85

  14. Acute intracranial hemorrhage secondary to thrombocytopenia: CT appearances unaffected by absence of clot retraction

    SciTech Connect

    Pierce, J.N.; Taber, K.H.; Hayman, L.A. (Baylor College of Medicine, Houston, TX (United States))

    1994-02-01

    To describe the in vivo CT appearance of acute intracerebral blood clots formed from anemic platelet-depleted blood. Three patients with intracerebral hemorrhage secondary only to thrombocytopenia were examined with CT within 2 1/2 hours after the onset of clinical symptoms. There were no unusual CT features found in the intracerebral hemorrhages of patients with only thrombocytopenia. Specifically, a hyperdense zone(s) surrounded by areas of decreased density was identified. Clot retraction (which cannot occur in patients with severe thrombocytopenia) is not necessary for the CT appearance of acute intracerebral hemorrhage. 22 refs., 3 figs., 1 tab.

  15. Computed tomographic findings in penetrating peptic ulcer

    SciTech Connect

    Madrazo, B.L.; Halpert, R.D.; Sandler, M.A.; Pearlberg, J.L.

    1984-12-01

    Four cases of peptic ulcer penetrating the head of the pancreas were diagnosed by computed tomography (CT). Findings common to 3 cases included (a) an ulcer crater, (b) a sinus tract, and (c) enlargement of the head of the pancreas. Unlike other modalities, the inherent spatial resolution of CT allows a convenient diagnosis of this important complication of peptic ulcer disease.

  16. Isolated Oculomotor Nerve Palsy: An Unusual Presentation of Glioblastoma Multiforme. Case Report and Review of the Literature

    Microsoft Academic Search

    Mahmoud Al-Yamany; Ayman Al-Shayji; Mark Bernstein

    1999-01-01

    The authors present a case of a very unusual clinical presentation of an intra-axial supratentorial glioblastoma multiforme (GBM) in a 63 year old diabetic female patient presenting with a three week history of left progressive complete oculomotor nerve palsy. CT scan and magnetic resonance imaging of the head revealed a left intra-axial mesial temporal glioblastoma multiforme. Operative resection and microscopic

  17. NETL CT Imaging Facility

    ScienceCinema

    None

    2014-05-21

    NETL's CT Scanner laboratory is equipped with three CT scanners and a mobile core logging unit that work together to provide characteristic geologic and geophysical information at different scales, non-destructively.

  18. NETL CT Imaging Facility

    SciTech Connect

    None

    2013-09-04

    NETL's CT Scanner laboratory is equipped with three CT scanners and a mobile core logging unit that work together to provide characteristic geologic and geophysical information at different scales, non-destructively.

  19. Chest CT Scan

    MedlinePLUS

    ... against the possible risks. Rarely, people have allergic reactions to the contrast dye that's sometimes used during chest CT scans. If this happens, medicine is given to relieve the symptoms. Rate This Content: Next >> February 29, 2012 Chest CT ...

  20. CT Myocardial Perfusion Imaging.

    PubMed

    Varga-Szemes, Akos; Meinel, Felix G; De Cecco, Carlo N; Fuller, Stephen R; Bayer, Richard R; Schoepf, U Joseph

    2015-03-01

    OBJECTIVE. CT myocardial perfusion imaging is rapidly becoming an important adjunct to coronary CT angiography for the anatomic and functional assessment of coronary artery disease with a single modality. Existing techniques for CT myocardial perfusion imaging include static techniques, which provide a snapshot of the myocardial blood pool, and dynamic techniques. CONCLUSION. This review provides a systematic overview of the presently available approaches for the assessment of myocardial perfusion at CT, including diagnostic accuracy and limitations. PMID:25714277

  1. Unusual uptake of radioiodine in a retroperitoneal bronchogenic cyst in a patient with thyroid carcinoma.

    PubMed

    Jiang, Xue; Zeng, Hao; Gong, Jing; Huang, Rui

    2015-05-01

    The incidence of retroperitoneal bronchial cyst is rare and is unusual to be visualized on I scan. We report a 52-year-old man who received I therapy for papillary thyroid cancer. The postablation whole-body scan revealed increased radioiodine activity in the left abdomen. SPECT/CT localized this activity from a soft tissue mass in the retroperitoneal space. A retroperitoneal tumor was considered, and retroperitoneal laparoscopic tumor resection was performed. Pathologic examination confirmed a retroperitoneal bronchogenic cyst. PMID:25546201

  2. An unusual case of myiasis.

    PubMed

    Messahel, Ahmed; Sen, Pinaki; Wilson, Ajay; Patel, Manu

    2010-01-01

    Myiasis-the feeding of fly larvae on living mammals, may have various clinical presentations depending on the tissues or organs involved. Myiasis is a common travel associated skin disorder as a consequence of short visits to developing countries. It is the fourth most common travel associated disease. The most common clinical manifestations of fly larvae infestation include inflammatory and allergic reactions. Ear, eye and respiratory tract infestations are not uncommon and the human botfly Dermatobia hominis is the most recognised causative organism. We present an unusual case report of a myiasis in the upper lip of a patient admitted under the maxillofacial team at South Manchester Hospital. PMID:20701890

  3. Palatal myoclonus: an unusual presentation.

    PubMed

    Ross, Shelly; Jankovic, Joseph

    2005-09-01

    We describe a 16-year-old woman with an unusual clinical presentation of palatal myoclonus after a severe upper respiratory infection. Besides the postinfectious onset, this case is unique in that the rhythmical contractions of her oropharynx, larynx, and esophagus occur in couplets rather than single contractions of typical essential palatal myoclonus. Additionally, these contractions are present only during the inspiratory phase of respiration. Imaging and other diagnostic studies show no evidence of cerebellar or brainstem pathology. This case broadens the phenomenology of palatal myoclonus and illustrates the occasional overlap in clinical features between essential and symptomatic palatal myoclonus. PMID:15929094

  4. Imaging of Acute Mesenteric Ischemia Using Multidetector CT and CT Angiography in a Porcine Model

    PubMed Central

    Rosow, David E.; Sahani, Dushyant; Strobel, Oliver; Kalva, Sanjeeva; Mino-Kenudson, Mari; Holalkere, Nagaraj S.; Alsfasser, Guido; Saini, Sanjay; Lee, Susanna I.; Mueller, Peter R.; Castillo, Carlos Fernández-del; Warshaw, Andrew L.; Thayer, Sarah P.

    2013-01-01

    Acute mesenteric ischemia, a frequently lethal disease, requires prompt diagnosis and intervention for favorable clinical outcomes. This goal remains elusive due, in part, to lack of a noninvasive and accurate imaging study. Traditional angiography is the diagnostic gold standard but is invasive and costly. Computed tomography (CT) is readily available and noninvasive but has shown variable success in diagnosing this disease. The faster scanning time of multidetector row CT (M.D.CT) greatly facilitates the use of CT angiography (CTA) in the clinical setting. We sought to determine whether M.D.CT-CTA could accurately demonstrate vascular anatomy and capture the earliest stages of mesenteric ischemia in a porcine model. Pigs underwent embolization of branches of the superior mesenteric artery, then imaging by M.D.CT-CTA with three-dimensional reconstruction protocols. After scanning, diseased bowel segments were surgically resected and pathologically examined. Multidetector row CT and CT angiography reliably defined normal and occluded mesenteric vessels in the pig. It detected early changes of ischemia including poor arterial enhancement and venous dilatation, which were seen in all ischemic animals. The radiographic findings—compared with pathologic diagnoses—predicted ischemia, with a positive predictive value of 92%. These results indicate that M.D.CT-CTA holds great promise for the early detection necessary for successful treatment of acute mesenteric ischemia. PMID:16332482

  5. An Unusual Localization of the Umbilicus in a Neonate

    PubMed Central

    Akman, Alkim Öden; Erturk, Nazile; Kavurt, Sumru; Celik, Ulker; Aydemir, Ozge; Yesiltepe, Cuneyt; Bas, Ahmet Yagmur; Demirel, Nihal

    2013-01-01

    We report the case of a male neonate with a low-set umbilicus. Physical examination revealed an appropriately grown term infant with no unusual findings, except ectopically placed umbilical cord at the level of the bladder in the hypogastric zone. The infant underwent detailed investigations that revealed no associated malformation. To the best of our knowledge, this is the first case with very distinct localization of the umbilicus without any congenital abnormalities.

  6. Unexplained Brightening of Unusual Star

    NASA Astrophysics Data System (ADS)

    1997-01-01

    Recent observations with the Hubble Space Telescope (HST) have documented an unexpected and rapid, seven-fold brightening of an unusual double star at the centre of the impressive 47 Tucanae globular cluster in the southern sky. This is the first HST observation of such a rare phenomenon. The astronomers [1] who are involved in this observational program find that this event cannot be explained by any of the common processes known to occur in such stars. The cores of globular clusters Globular clusters are like huge swarms of stars, containing about one million suns, which move around in their common gravitational field. Most galaxies contain globular clusters; around 150 are known within the confines of our Galaxy, the Milky Way. Globular clusters change with time. In particular, at some stage in the life of a globular cluster, its central region will contract whereby the stars there move closer to each other. This phenomenon is referred to as core collapse [2]. Observations with the Hubble Space Telescope (HST) have revealed enormous central densities of the order of 30,000 stars per cubic light-year in clusters with fully collapsed cores; this is to be compared with the stellar density in the solar neighborhood of only 0.003 stars per cubic light-year [3]. Binary stars in globular clusters Binary (i.e., double) stars play an important role in the evolution of globular clusters: they can delay, halt, or even reverse the process of core collapse. In this dense stellar environment, close encounters between passing stars and binaries are relatively frequent. Such events may leave the binary stars more tightly bound, and at the same time speed up the motion of the stars involved, thereby counteracting the contraction of the core. The same close stellar encounters may also produce a diverse progeny of exotic objects. The centers of globular clusters contain blue stragglers (stars that ``look'' younger than they really are), millisecond pulsars (rapidly rotating, very compact objects), both high- and low-luminosity X-ray sources , and cataclysmic variables (double stars whose light `flickers'). The kinds and numbers of these objects in cluster cores constrain the complex and as yet incompletely understood formation channels, most of which involve encounters with binaries. Many of the above exotic objects are strong emitters of ultraviolet light. The globular cluster 47 Tucanae 47 Tucanae is an impressive globular cluster that is visible with the naked eye from the southern hemisphere. It is one of the closest (distance 15,000 lightyears) and heaviest (total mass about 1 million solar masses) in our Galaxy. It contains about 1 million stars and the member stars have been intensively studied for decades. The observed structure of 47 Tucanae indicates that it is now approaching its ultimate fate during a core collapse phase. There are five known low-luminosity X-ray sources in the core of this cluster, eleven millisecond pulsars, many blue stragglers, and a centrally concentrated population of eclipsing binary stars. The observations support the idea that the population of primordial binaries in this cluster has been heavily modified by stellar encounters. The HST observations In late 1996, the group of astronomers obtained time to observe the central area of 47 Tucanae with the Hubble Space Telescope and the second Wide Field and Planetary Camera (WFPC2). During a period of more than 4 hours, a total of 15 CCD exposures were obtained through an ultraviolet filter (transmission near 3000 A), showing the thousands of individual stars in this densely populated region. Caption to ESO PR Photo 03/97 [GIF, 57k] When inspecting this material, it immediately became clear that one of the stars had undergone a substantial brightening in the course of these observations. In fact, its brightness increased by as much as 2.1 magnitudes, that is a factor of seven, in less than one hour; see the photos that accompany this Press Release. By the end of the observations, it had become the brightest star in the core of the cluster. Caption to ESO

  7. Find Someone

    NSDL National Science Digital Library

    2010-01-01

    Create a "Find Someone" list, with about 10 items, each containing a shape, number, or measurement. Can you find someone in the group with hair about 4 inches long? Someone wearing parallel lines? Someone born in the 10th month? Learners circulate, trying to find someone who matches each item on the list. To engage younger learners, base the “Find Someone” list on things to count: find someone wearing 7 buttons or find someone wearing 5 barrettes. Available as a web page or downloadable pdf. Students should have basic reading skills.

  8. [CT in normal pressure hydrocephalus--correlation between CT and clinical response to shunting (author's transl)].

    PubMed

    Fujita, K; Nogaki, H; Noda, M; Kusunoki, T; Tamaki, N; Matsumoto, S

    1981-02-01

    CT scans were obtained on 33 patients (age 73y. to 31y.) with the diagnosis of normal pressure hydrocephalus. In each case, the diagnosis was made on the basis of the symptoms, CT and cisternographic findings. Underlying diseases of normal pressure hydrocephalus are ruptured aneurysms (21 cases), arteriovenous malformations (2 cases), head trauma (1 case), cerebrovascular accidents (1 case) and idiopathy (8 cases). Sixteen of 33 patients showed marked improvement, five, moderate or minimal improvement, and twelve, no change. The results were compared with CT findings and clinical response to shunting. CT findings were classified into five types, bases on the degree of periventricular hypodensity (P.V.H.), the extent of brain damage by underlying diseases, and the degree of cortical atrophy. In 17 cases of type (I), CT shows the presence of P.V.H. with or without minimal frontal lobe damage and no cortical atrophy. The good surgical improvements were achieved in all cases of type (I) by shunting. In 4 cases of type (II), CT shows the presence of P.V.H. and severe brain damage without cortical atrophy. The fair clinical improvements were achieved in 2 cases (50%) by shunting. In one case of type (III), CT shows the absence of P.V.H. without brain damage nor cortical atrophy. No clinical improvement was obtained by shunting in this type. In 9 cases of type (IV) with mild cortical atrophy, the fair clinical improvement was achieved in two cases (22%) and no improvement in 7 cases. In 2 cases of type (V) with moderate or marked cortical atrophy, no clinical improvement was obtained by shunting. In conclusion, it appeared from the present study that there was a good correlation between the result of shunting and the type of CT, and clinical response to shunting operation might be predicted by classification of CT findings. PMID:7242797

  9. The unusual helium variable AM Canum Venaticorum

    NASA Technical Reports Server (NTRS)

    Provencal, J. L.; Winget, D. E.; Nather, R. E.; Robinson, E. L.; Solheim, J.-E.; Clemens, J. C.; Bradley, J. L.; Kleinman, S. J.; Kanaan, A.; Claver, C. F.

    1995-01-01

    The unusual variable star AM CVn has puzzled astronomers for over 40 years. This object, both a photometric and spectroscopic variable, is believed to contain a pair of hydrogen-deficient white dwarfs of extreme mass ratio, transferring material via an accretion disk. We examine the photometric properties of AM CVn, analyzing 289 hours of high-speed photometric data spanning 1976 to 1992. The power spectrum displays significant peaks at 988.7, 1248.8, 1902.5, 2853.8, 3805.2, 4756.5, and 5707.8 microHz (1011.4, 800.8, 525.6, 350.4, 262.8, 210.2, and 175.2 s). We find no detectable power at 951.3 microHz (1051 s), the previously reported main frequency. The 1902.5, 2853.9, and 3805.2 microHz peaks are multiplets, with frequency splitting in each case of 20.77 +/- 0.05 microHz. The 1902.5 microHz seasonal pulse shapes are identical, within measurement noise, and maintain the same amplitude and phase as a function of color. We have determined the dominant frequency to be 1902.50902 +/- 0.00001 microHz with dot P = +1.71 (+/- 0.04) x 10(exp -11) s/s. We discuss the implications of these findings on a model for AM CVn.

  10. Multiple osteosclerotic lesions in an Iron Age skull from Switzerland (320-250 BC)--an unusual case.

    PubMed

    Moghaddam, Negahnaz; Langer, Rupert; Ross, Steffen; Nielsen, Ebbe; Lösch, Sandra

    2013-01-01

    The single Hochdorf burial was found in 1887 during construction work in the Canton of Lucerne, Switzerland. It dates from between 320 and 250 BC. The calvarium, the left half of the pelvis and the left femur were preserved. The finding shows an unusual bony alteration of the skull. The aim of this study was to obtain a differential diagnosis and to examine the skull using various methods. Sex and age were determined anthropologically. Radiological examinations were performed with plain X-ray imaging and a multislice computed tomography (CT) scanner. For histological analysis, samples of the lesion were taken. The pathological processing included staining after fixation, decalcification, and paraffin embedding. Hard-cut sections were also prepared. The individual was female. The age at death was between 30 and 50 years. There is an intensely calcified bone proliferation at the right side of the os frontalis. Plain X-ray and CT imaging showed a large sclerotic lesion in the area of the right temple with a partly bulging appearance. The inner boundary of the lesion shows multi-edged irregularities. There is a diffuse thickening of the right side. In the left skull vault, there is a mix of sclerotic areas and areas which appear to be normal with a clear differentiation between tabula interna, diploë and tabula externa. Histology showed mature organised bone tissue. Radiological and histological findings favour a benign condition. Differential diagnoses comprise osteomas which may occur, for example, in the setting of hereditary adenomatous polyposis coli related to Gardner syndrome. PMID:23897004

  11. Unusual Cause of Knee Locking

    PubMed Central

    Huri, Gazi; Biçer, Omer Sunkar

    2013-01-01

    We report a case of partial intrasubstance tear of popliteus tendon as an unusual cause of pseudolocking of the knee. A 13-year-old semiprofessional soccer player applied to our clinic with a locked right knee in spite of the therapy applied (cold pack, NSAID, and immobilization) in another institution 20 days after the injury. Significant extension loss was observed in his right knee with 30°–90°?ROM. Magnetic resonance imaging (MRI) and arthroscopy confirmed the intrasubstance tear of popliteus tendon and synovitis. The ruptured part of the tendon was debrided, and the inflammatory tissue around the tendon, which may lead to pseudolocking, was gently removed with a shaver in order to regain the normal ROM. The patient was discharged with full ROM and weight bearing first day after the surgery. To our knowledge, this is the first case demonstrating intrasubstance tear of popliteus tendon causing pseudolocking of the knee. PMID:23476852

  12. UNUSUAL FILAMENTS INSIDE THE UMBRA

    SciTech Connect

    Kleint, L. [High Altitude Observatory/NCAR, P.O. Box 3000, Boulder, CO 80307 (United States); Sainz Dalda, A., E-mail: kleintl@ucar.edu [Stanford-Lockheed Institute for Space Research, Stanford University, HEPL, 466 Via Ortega, Stanford, CA 94305 (United States)

    2013-06-10

    We analyze several unusual filamentary structures which appeared in the umbra of one of the sunspots in AR 11302. They do not resemble typical light bridges in morphology or in evolution. We analyze data from SDO/HMI to investigate their temporal evolution, Hinode/SP for photospheric inversions, IBIS for chromospheric imaging, and SDO/AIA for the overlying corona. Photospheric inversions reveal a horizontal, inverse Evershed flow along these structures, which we call umbral filaments. Chromospheric images show brightenings and energy dissipation, while coronal images indicate that bright coronal loops seem to end in these umbral filaments. These rapidly evolving features do not seem to be common, and are possibly related to the high flare-productivity of the active region. Their analysis could help to understand the complex evolution of active regions.

  13. Intraventricular Hemorrhage after Epidural Blood Patching: An Unusual Complication

    PubMed Central

    Couldwell, William T.

    2014-01-01

    The authors present two cases of intraventricular hemorrhage (IVH) believed to be a result of epidural blood patching. The first was a 71-year-old woman who had new onset of nontraumatic IVH on computed tomography (CT) scan after undergoing an epidural blood patch (EBP). This amount of intraventricular blood was deemed an incidental finding since it was of very small volume to account for her overall symptoms. The second patient, a 29-year-old woman, was found to have nontraumatic IVH three days after undergoing an EBP. This was seen on CT scan of the head for workup of pressure-like headaches, nausea, vomiting, and absence seizures. Conservative management was followed in both instances. Serial CT scan of the head in our first patient displayed complete resolution of her IVH. The second patient did not have follow-up CT scans because her overall clinical picture had improved significantly. This highlights a potential sequel of EBP that may be observed on CT scan of the head. In the event that IVH is detected, signs and symptoms of hydrocephalus should be closely monitored with the consideration for a future workup if warranted by the clinical picture. PMID:25544916

  14. CT in the diagnosis of enterovesical fistulae

    SciTech Connect

    Goldman, S.M.; Fishman, E.K.; Gatewood, O.M.B.; Jones, B.; Siegelman, S.S.

    1985-06-01

    Enterovesical fistulae are difficult to demonstrate by conventional radiographic methods. Computed tomography (CT), a sensitive, noninvasive method of documenting the presence of such fistulae, is unique in its ability to outline the extravesical component of the primary disease process. Twenty enterovesical fistulae identified by CT were caused by diverticulitis (nine), carcinoma of the rectosigmoid (two), Crohn disease (three), gynecologic tumors (two), bladder cancer (one), cecal carcinoma (one), prostatic neoplasia (one), and appendiceal abscess (one). The CT findings included intravesical air (90%), passage of orally or rectally administered contrast medium into the bladder (20%), focal bladder-wall thickening (90%), thickening of adjacent bowel wall (85%), and an extraluminal mass that often contained air (75%). CT proved to be an important new method in the diagnosis of enterovesical fistulae.

  15. CT of soft-tissue neoplasms

    SciTech Connect

    Weekes, R.G.; McLeod, R.A.; Reiman, H.M.; Pritchard, D.J.

    1985-02-01

    The computed tomographic scans (CT) of 84 patients with untreated soft-tissue neoplasms were studied, 75 with primary and nine with secondary lesions. Each scan was evaluated using several criteria: homogeneity and density, presence and type of calcification, presence of bony destruction, involvement of multiple muscle groups, definition of adjacent fat, border definition, and vessel or nerve involvement. CT demonstrated the lesion in all 84 patients and showed excellent anatomic detail in 64 of the 75 patients with primary neoplasms. The CT findings were characteristic enough to suggest the histology of the neoplasm in only 13 lesions (nine lipomas, three hemangiomas, one neurofibroma). No malignant neoplasm had CT characteristics specific enough to differentiate it from any other malignant tumor. However, malignant neoplasms could be differentiated from benign neoplasms in 88% of the cases.

  16. Multislice CT angiography

    Microsoft Academic Search

    U. Joseph Schoepf; Christoph R. Becker; Lars K. Hofmann; Marco Das; Thomas Flohr; Bernd M. Ohnesorge; Bernhard Baumert; Joshua Rolnick; Jean M. Allen; Vassilios Raptopoulos

    2003-01-01

    .  The introduction of multislice CT into clinical radiology constitutes a quantum leap that significantly widens the scope of\\u000a vascular CT imaging. The advances over conventional spiral CT have been quantitative, mainly in terms of increased image acquisition\\u000a speed which provides unprecedented volume coverage and spatial resolution. Moreover, significant technical innovations, such\\u000a as cardiac scanning capabilities, have brought about a qualitative

  17. Unusual Fears in Children with Autism

    ERIC Educational Resources Information Center

    Mayes, Susan Dickerson; Calhoun, Susan L.; Aggarwal, Richa; Baker, Courtney; Mathapati, Santosh; Molitoris, Sarah; Mayes, Rebecca D.

    2013-01-01

    Unusual fears have long been recognized as common in autism, but little research exists. In our sample of 1033 children with autism, unusual fears were reported by parents of 421 (41%) of the children, representing 92 different fears. Many additional children had common childhood fears (e.g., dogs, bugs, and the dark). More than half of children…

  18. UNUSUAL SONGS IN PASSERINE BIRDS1

    Microsoft Academic Search

    DONALD J. BORROR

    Unusual songs of passerine birds fall into five categories: (1) special songs, sung only under certain circumstances, and considered unusual only because they are seldom heard; (2) developmental stages of primary song; (3) songs resembling those of another species (mimicry); (4) song types outside their usual geographic range, and rare or accidental where heard; and (5) atypical songs. Songs of

  19. CT and MR image fusion for CSF leak diagnosis

    NASA Astrophysics Data System (ADS)

    Hu, Yangqiu; Haynor, David R.; Maravilla, Kenneth R.

    2008-03-01

    The diagnosis of CSF leak using MR images alone is difficult due to the inherently poor bony information on MR images. While CT images show bones exquisitely, they lack the soft tissue contrast that is important for detecting CSF leak. For these reasons, CT cisternography has been the preferred modality for CSF leak diagnosis despite its invasiveness. We propose a method to fuse the CT and MR images to combine the complementary information from each modality, which we believe will help with the diagnosis and surgical planning for patients with CSF leak, and potentially reduce/replace the use of CT cisternography. In the first step, the user identifies three roughly corresponding points on both the CT and MR images. A GUI was designed that allows the user to quickly navigate through the images by reslicing the volumes interactively. After finding the CT and MR slices at approximately the same anatomical position, the user places three markers to represent the same spatial location. In the second step, a generalized Procrustes transform is used to compute an initial transformation that aligns the CT and MR, which is then optimized using mutual information maximization. The CT is registered with the MR using the optimal transformation found, and the bony masks determined from thresholding CT intensity are blended with MR images. Initial results suggest that CT/MR fusion images are superior to unprocessed CT and MR images in diagnosing CSF leak, and a formal clinical evaluation is being planned to assess the efficacy of fusion images.

  20. Use of single-photon emission computed tomography/low-resolution computed tomography fusion imaging in detecting an unusually presenting osteoid osteoma of the lumbar vertebra.

    PubMed

    Hephzibah, Julie; Theodore, Bernice; Oommen, Regi; David, Kenny; Moses, Vinu; Shah, Sanjeev; Panicker, Jayalakshmi

    2009-03-01

    In this article, we describe an unusual presentation of osteoid osteoma of the lumbar vertebra in a woman in her early 30s. Single-photon emission computed tomography/low-resolution computed tomography (SPECT/CT) fusion imaging was used to detect the osteoma, precisely localize the pathology site, and guide surgical excision of the lesion. In recent years, SPECT/CT fusion imaging has helped make interpretations of scintigraphic images significantly more accurate. PMID:19377642

  1. Rock Finding

    ERIC Educational Resources Information Center

    Rommel-Esham, Katie; Constable, Susan D.

    2006-01-01

    In this article, the authors discuss a literature-based activity that helps students discover the importance of making detailed observations. In an inspiring children's classic book, "Everybody Needs a Rock" by Byrd Baylor (1974), the author invites readers to go "rock finding," laying out 10 rules for finding a "perfect" rock. In this way, the…

  2. Learning optimal eye movements to unusual faces.

    PubMed

    Peterson, Matthew F; Eckstein, Miguel P

    2014-06-01

    Eye movements, which guide the fovea's high resolution and computational power to relevant areas of the visual scene, are integral to efficient, successful completion of many visual tasks. How humans modify their eye movements through experience with their perceptual environments, and its functional role in learning new tasks, has not been fully investigated. Here, we used a face identification task where only the mouth discriminated exemplars to assess if, how, and when eye movement modulation may mediate learning. By interleaving trials of unconstrained eye movements with trials of forced fixation, we attempted to separate the contributions of eye movements and covert mechanisms to performance improvements. Without instruction, a majority of observers substantially increased accuracy and learned to direct their initial eye movements towards the optimal fixation point. The proximity of an observer's default face identification eye movement behavior to the new optimal fixation point and the observer's peripheral processing ability were predictive of performance gains and eye movement learning. After practice in a subsequent condition in which observers were directed to fixate different locations along the face, including the relevant mouth region, all observers learned to make eye movements to the optimal fixation point. In this fully learned state, augmented fixation strategy accounted for 43% of total efficiency improvements while covert mechanisms accounted for the remaining 57%. The findings suggest a critical role for eye movement planning to perceptual learning, and elucidate factors that can predict when and how well an observer can learn a new task with unusual exemplars. PMID:24291712

  3. Managing unusual presentations of venous thromboembolism.

    PubMed

    Ageno, Walter

    2015-04-01

    Venous thromboembolism that occurs in unusual sites is challenging because of the potential severity of presentation, the presence of some major provoking risk factors, the high prevalence of potential contraindications to antithrombotic therapies, the lack of solid evidence to guide therapeutic decisions, and because of the severity of long-term consequences. For example, venous thrombosis in the splanchnic veins frequently occurs in patients with liver cirrhosis. Not uncommonly, these patients present with concomitant active gastrointestinal bleeding, and/or low platelet count or oesophageal varices. If inadequately treated, splanchnic vein thrombosis (SVT) may further worsen portal hypertension and, thus, increase the long-term risk of bleeding. Up to 40 % of patients with cerebral vein thrombosis (CVT) have signs of intracranial bleeding at the time of the diagnosis. This finding is associated with worst prognosis in terms of death or severe disability. Despite the apparent presence of a major contraindication to anticoagulation, only a timely administration of parenteral anticoagulant drugs may improve this unfavourable outcome. The available evidence on the management of these two challenging disorders, SVT and CVT, will be reviewed in this article. PMID:25682057

  4. BVRI PHOTOMETRY OF 53 UNUSUAL ASTEROIDS

    SciTech Connect

    Ye, Q.-Z., E-mail: tom6740@gmail.com [Department of Atmospheric Sciences, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou (China)

    2011-02-15

    We present the results of BVRI photometry and classification of 53 unusual asteroids, including 35 near-Earth asteroids (NEAs), 6 high eccentricity/inclination asteroids, and 12 recently identified asteroid-pair candidates. Most of these asteroids were not classified prior to this work. For the few asteroids that have been previously studied, the results are generally in agreement. In addition to observing and classifying these objects, we merge the results from severalphotometric/spectroscopic surveys to create the largest-ever sample with 449 spectrally classified NEAs for statistical analysis. We identify a 'transition point' of the relative number of C/X-like and S-like NEAs at H {approx} 18 {r_reversible} D {approx} 1 km with confidence level at {approx}95% or higher. We find that the C/X-like:S-like ratio for 18 {<=} H < 22 is about twice as high as that of H < 18 (0.33 {+-} 0.04 versus 0.17 {+-} 0.02), virtually supporting the hypothesis that smaller NEAs generally have less weathered surfaces (therefore less reddish appearance) due to younger collision ages.

  5. Immature ovarian teratoma with unusual gliomatosis

    PubMed Central

    2013-01-01

    This study aimed to investigate an unusual case of immature ovarian teratoma with onset of mature glial cells implanted on the contralateral ovary, a challenge in the diagnosis of the second ovarian tumor. We report the case of a 31- yr-old woman, who developed at the age of 16 an immature teratoma in the right ovary that was surgically removed. Six years later mature glial implants were present on the left ovary and six months later at the level of peritoneum that relapsed after other six months. The patient suffered three surgical resections after the initial one. Paraffin sections and immunohistochemical examinations using antibodies against glial and neuronal antigens were performed. In the teratoma, the neuroectodermal tissue expressed Glial fibrillary acidic protein (GFAP), S100 protein, Epithelial membrane antigen (EMA) and Cytokeratin 34 beta E12 (Ck34beta E12), wheares the implants expressed only GFAP and S100 protein. The immature teratoma is the rarest type of ovarian teratomas. Gliomatosis peritonei is an exceptional finding, expecially with onset on the contralaterally ovary. The implant of the mature glial cells has a high risk of relapse, as seen in our case, thus close follow-up of the patient is necessary. PMID:23590935

  6. Detection of Occult Primary Tumors in Patients with Cervical Metastases of Unknown Primary Tumors: Comparison of (18)F FDG PET/CT with Contrast-enhanced CT or CT/MR Imaging-Prospective Study.

    PubMed

    Lee, Jae Ryung; Kim, Jae Seung; Roh, Jong-Lyel; Lee, Jeong Hyun; Baek, Jung Hwan; Cho, Kyung-Ja; Choi, Seung-Ho; Nam, Soon Yuhl; Kim, Sang Yoon

    2015-03-01

    Purpose To assess diagnostic accuracy of fluorine 18 ((18)F) fluorodeoxyglucose (FDG) combined positron emission tomography (PET) and computed tomography (CT) in the detection of occult primary tumors and determination of optimal care in patients with cervical metastasis of an unknown primary tumor (CUP) compared with contrast material-enhanced CT alone or combined contrast-enhanced CT and magnetic resonance (MR) imaging (CT/MR imaging). Materials and Methods Institutional review board approval and written informed consent were obtained. In total, 56 patients with initially undetected tumors after endoscopic or physical examination were prospectively assessed with (18)F FDG PET/CT and contrast-enhanced CT or contrast-enhanced CT/MR imaging. The contrast-enhanced CT/MR images were read in combination. Results of guided biopsy with general anesthesia served as the reference standard. Diagnostic values of (18)F FDG PET/CT, contrast-enhanced CT, and contrast-enhanced CT/MR imaging were compared with the McNemar test. Results Primary tumors were detected at 32 sites in 31 (55%) of 56 patients. There were 26 tumors in the palatine tonsil, two in the hypopharynx, two in the base of the tongue, and two in the nasopharynx. PET/CT depicted 22 (69%) of 32 primary tumors, but it failed to depict primary tumors in 10 (31%) of 32 cases. Overall, sensitivity of PET/CT (69%) in detection of primary tumors was higher than that of contrast-enhanced CT (16%) (P < .001) or contrast-enhanced CT/MR imaging (41%) (P = .039), while specificity of these methods did not differ (88%, 76%, and 59% for PET/CT, contrast-enhanced CT, and contrast-enhanced CT/MR imaging, respectively; P > .4). Diagnostic performance (area under the receiver operating characteristics curve [AUC] = 0.759) of PET/CT in tumor detection was significantly better than that of contrast-enhanced CT alone (AUC = 0.531) (P = .001) or contrast-enhanced CT/MR imaging (AUC = 0.537) (P = .036). PET/CT depicted primary tumors in eight (50%) of 16 cases of false-negative CT/MR imaging findings, one distant metastatic case, and two cases of synchronous cancer. Conclusion (18)F FDG PET/CT is more sensitive in detection of primary tumors than is contrast-enhanced CT or contrast-enhanced CT/MR imaging in patients with CUP; therefore, it may lead to improved therapeutic planning in these patients. (©) RSNA, 2014. PMID:25405771

  7. CT features of nonfunctioning islet cell carcinoma

    SciTech Connect

    Eelkema, E.A.; Stephens, D.H.; Ward, E.M.; Sheedy, P.F. II

    1984-11-01

    To determine the computed tomographic (CT) characteristics of nonfunctioning islet cell carcinoma of the pancreas, the CT scans of 27 patients with that disease were reviewed. The pancreatic tumor was identified as a mass in 26 patients (96%) Of the 25 tumors evaluated with contrast enhancement, 20 became partially diffusely hyperdense relative to nearby normal pancreatic tissue. Hepatic metastases were identified in 15 patients (56%), regional lymphadenopathy in 10 (37%), atrophy of the gland proximal to the tumor in six (22%), dilatation of the biliary ducts in five (19%), and dilatation of the pancreatic duct in four (15%). The CT appearances of the nonfunctioning islet cell tumors were compared with those of 100 ordinary (ductal) pancreatic adenocarcinomas. Although the two types of tumors were sometimes indistinguishable, features found to be more characteristic of islet cell carcinoma included a pancreatic mass of unusually large size, calcification within the tumor, and contrast enhancement of either the primary tumor or hepatic metastases. Involvement of the celiac axis or proximal superior mesenteric artery was limited to ductal carcinoma.

  8. CT in Pseudomyxoma Peritonei: A Review of 17 Cases

    Microsoft Academic Search

    T. V. C. Sulkin; H. O'Neill; A. I. Amin; B. Moran

    2002-01-01

    AIM: To describe the computed tomography (CT) findings in pseudomyxoma peritonei. MATERIALS AND METHOD: Two observers independently and retrospectively reviewed the CT images of 17 consecutive patients (nine women, eight men, mean age 53 years) with histologically proven pseudomyxoma peritonei. RESULTS: Six patients had small volume disease where pseudomyxoma peritonei was present in focal collections in the peritoneal cavity. Eleven

  9. An unusual volcano on Venus

    NASA Technical Reports Server (NTRS)

    Moore, H. J.; Plaut, J. J.; Schenk, P. M.; Head, J. W.

    1992-01-01

    Materials that issued from an unusual Venusian volcano produced (1) a complex domical structure about 100 km across with thick, broad flow lobes up to 41 wide, (2) an extensive sheet of thick flows, and (3) radar-bright surfaces that extend to 360-400 km from the volcano. Altimetry indicates that the relief of the domical structure is about 0.5-1.1 km. The lobes and flows have prominant regularly spaced ridges about 686-820 m apart. Thick flows with large ridge separations and broad lobes are rare on Venus. The viscosities of these flows were larger than those of most lava flows on Venus. Comparisons of the dimensions of the volcano's lobes with lava flows on earth suggest that the Venusian lavas may have large silica contents. Radar-bright surfaces around the volcano may represent the result of an explosive eruption or very thin deposits of low-viscosity lavas. Thus, the radar-bright surfaces and lavas of the volcano were derived from a magma that differentiated within the crust or mantle of Venus. The differentiation produced (1) a gas-rich low-viscosity phase, (2) high-viscosity lavas, and (3) a residual primary magma.

  10. Unusual applications of noninvasive ventilation.

    PubMed

    Ambrosino, N; Guarracino, F

    2011-08-01

    The use of noninvasive ventilation (NIV) in acute hypercapnic respiratory failure, cardiogenic pulmonary oedema, acute lung injury/acute respiratory distress syndrome (ARDS), community-acquired pneumonia and weaning/post-extubation failure is considered common in clinical practice. Herein, we review the use of NIV in unusual conditions. Evidence supports the use of NIV during fibreoptic bronchoscopy, especially with high risks of endotracheal intubation (ETI), such as in immunocompromised patients. During transoesophageal echocardiography as well as in interventional cardiology and pulmonology, NIV can reduce the need for deep sedation or general anaesthesia and prevent respiratory depression induced by deep sedation. NIV may be useful after surgery, including cardiac surgery, and, with a lower level of evidence, in patients with pulmonary contusion. NIV should not be considered as an alternative to ETI in severe communicable airborne infections likely to progress to ARDS. NIV is being used increasingly as an alternative to ETI in end-stage symptomatic patients, especially to relieve dyspnoea. The role of assisted ventilation during exercise training in chronic obstructive pulmonary disease patients is still controversial. NIV should be applied under close monitoring and ETI should be promptly available in the case of failure. A trained team, careful patient selection and optimal choice of devices, can optimise outcome of NIV. PMID:21349915

  11. Pneumoconiosis: Comparison of imaging and pathologic findings

    SciTech Connect

    Chong, S.; Lee, K.S.; Chung, M.J.; Han, J.H.; Kwon, O.J.; Kim, T.S. [Sungkyunkwan University School of Medicine, Seoul (Republic of Korea). Samsung Medical Center

    2006-01-15

    Pneumoconiosis may be classified as either fibrotic or nonfibrotic, according to the presence or absence of fibrosis. Silicosis, coal worker pneumoconiosis, asbestosis, berylliosis, and talcosis are examples of fibrotic pneumoconiosis. Siderosis, stannosis, and baritosis are nonfibrotic forms of pneumoconiosis that result from inhalation of iron oxide, tin oxide, and barium sulfate particles, respectively. In an individual who has a history of exposure to silica or coal dust, a finding of nodular or reticulonodular lesions at chest radiography or small nodules with a perilymphatic distribution at thin-section computed tomography (CT), with or without eggshell calcifications, is suggestive of silicosis or coal worker pneumoconiosis. Magnetic resonance imaging is helpful for distinguishing between progressive massive fibrosis and lung cancer. CT and histopathologic findings in asbestosis are similar to those in idiopathic pulmonary fibrosis, but the presence of asbestos bodies in histopathologic specimens is specific for the diagnosis of asbestosis. Giant cell interstitial pneumonia due to exposure to hard metals is classified as a fibrotic form of pneumoconiosis and appears on CT images as mixed ground-glass opacities and reticulation. Berylliosis simulates pulmonary sarcoidosis on CT images. CT findings in talcosis include small centrilobular and subpleural nodules or heterogeneous conglomerate masses that contain foci of high attenuation indicating talc deposition. Siderosis is nonfibrotic and is indicated by a CT finding of poorly defined centrilobular nodules or ground-glass opacities.

  12. Pneumoconiosis: comparison of imaging and pathologic findings

    SciTech Connect

    Semin Chong; Kyung Soo Lee; Myung Jin Chung; Joungho Han; O. Jung Kwon; d Tae Sung Kim [Sungkyunkwan University School of Medicine, Seoul (Republic of Korea). Department of Radiology and Center for Imaging Science

    2006-01-15

    Pneumoconiosis may be classified as either fibrotic or nonfibrotic, according to the presence or absence of fibrosis. Silicosis, coal worker pneumoconiosis, asbestosis, berylliosis, and talcosis are examples of fibrotic pneumoconiosis. Siderosis, stannosis, and baritosis are nonfibrotic forms of pneumoconiosis that result from inhalation of iron oxide, tin oxide, and barium sulfate particles, respectively. In an individual who has a history of exposure to silica or coal dust, a finding of nodular or reticulonodular lesions at chest radiography or small nodules with a perilymphatic distribution at thin-section computed tomography (CT), with or without eggshell calcifications, is suggestive of silicosis or coal worker pneumoconiosis. Magnetic resonance imaging is helpful for distinguishing between progressive massive fibrosis and lung cancer. CT and histopathologic findings in asbestosis are similar to those in idiopathic pulmonary fibrosis, but the presence of asbestos bodies in histopathologic specimens is specific for the diagnosis of asbestosis. Giant cell interstitial pneumonia due to exposure to hard metals is classified as a fibrotic form of pneumoconiosis and appears on CT images as mixed ground-glass opacities and reticulation. Berylliosis simulates pulmonary sarcoidosis on CT images. CT findings in talcosis include small centrilobular and subpleural nodules or heterogeneous conglomerate masses that contain foci of high attenuation indicating talc deposition. Siderosis is nonfibrotic and is indicated by a CT finding of poorly defined centrilobular nodules or ground-glass opacities.

  13. Computed Tomography (CT) Standards

    SciTech Connect

    Hubert, R.R.; Beach, J.M.

    2000-02-02

    There is currently no standardized method to check the measurement capabilities of computed tomography (CT) systems within industry. The current method to determine the functionality of CT systems is by use of a test phantom to represent the actual part to be tested. A standard method to check the software algorithms when measuring such parameters as density of a material and the size of an object is not readily available. Many different materials are evaluated by CT systems. A set of standards necessitates the inclusion of materials that cover the gambit of materials encountered. The Federal Manufacturing and Technologies (FM and T) CT standards are designed to accommodate a variety of materials and several different sizes. This provides a method to check the CT system for size measurement capabilities and material density measurement as well as aid in optimizing the geometric parameters of the machine configuration.

  14. FDG-PET/CT in lymphoma.

    PubMed

    D'souza, Maria M; Jaimini, Abhinav; Bansal, Abhishek; Tripathi, Madhavi; Sharma, Rajnish; Mondal, Anupam; Tripathi, Rajendra Prashad

    2013-10-01

    Lymphomas are a heterogeneous group of diseases that arise from the constituent cells of the immune system or from their precursors. 18F-fludeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) is now the cornerstone of staging procedures in the state-of-the-art management of Hodgkin's disease and aggressive non-Hodgkin's lymphoma. It plays an important role in staging, restaging, prognostication, planning appropriate treatment strategies, monitoring therapy, and detecting recurrence. However, its role in indolent lymphomas is still unclear and calls for further investigational trials. The protean PET/CT manifestations of lymphoma necessitate a familiarity with the spectrum of imaging findings to enable accurate diagnosis. A meticulous evaluation of PET/CT findings, an understanding of its role in the management of lymphomas, and knowledge of its limitations are mandatory for the optimal utilization of this technique. PMID:24604942

  15. SpaceWire Tiger Team Findings and Suggestions

    NASA Technical Reports Server (NTRS)

    Ishac, Joseph A.

    2011-01-01

    This technical report intends to highlight the key findings and recommendations of the SpaceWire Tiger Team for the CoNNeCT project. It covers findings which are technical in nature, covering design concepts and approaches.

  16. An S-shaped sinoatrial nodal artery coronary artery fistula demonstrated by multidetector CT

    PubMed Central

    Macduff, R; Roditi, G H

    2011-01-01

    The presented case and discussion illustrate the use of CT coronary angiography to depict coronary artery fistulae. A 41-year-old man presented with an acute myocardial infarction. Invasive angiography revealed an incidental coronary artery fistula but was unable to depict its course. CT coronary angiography was undertaken to define the course and termination of the fistula. This confirmed a fistulous connection between the left circumflex artery and the superior vena cava that followed the typical course of an S-shaped sinoatrial nodal artery. Even in such an unusual anomaly this case highlights the ability of CT coronary angiography to accurately depict the coronary artery anatomy. PMID:21224306

  17. The unreliability of CT numbers as absolute values

    SciTech Connect

    Levi, C. (Health Sciences Centre, Winnipeg, Manitoba, Canada); Gray, J.E.; McCullough, E.C.; Hattery, R.R.

    1982-09-01

    The use of CT numbers as absolute values was examined by scanning a standard phantom on five CT scanners under a variety of conditions simulating those encountered in routine body CT scanning. The results show that: (1) There are significant differences in absolute CT numbers between most scanners (only one scanner produced CT numbers that were equal to zero for water); (2) There are significant differences in absolute CT numbers between two scanners of the same manufacturer and model that were examined; (3) There is a significant difference in CT numbers in a single phantom scan, dependent on location in the scan, and the format of this variability is not constant from one scanner to another; and (4) There may be a significant difference in absolute CT numbers depending on various physical factors (e.g., kilovoltage, phantom orientation in scan aperture, and position of the phantom in the scan aperture). The findings suggest that there is a wide range of CT numbers observed for a given tissue type as a result of scanner performance alone, and that if absolute CT numbers are to be used for diagnosis the user must document that these machine-related variations are less than the differences thought to be significant.

  18. A comparative study of SPECT\\/CT fusion imaging and CT in infiltrated mandible by gingival carcinoma

    Microsoft Academic Search

    Hongwei Liu; Guichang Li; Ningyi Li; Jie Wang; Baomei Fang

    2009-01-01

    Objective  The aim of the study was to evaluate the clinical value of 99mTc-methylene diphosphonic acid (MDP) SPECT\\/CT fusion imaging and CT scanning in diagnosis of infiltrated mandible by gingival\\u000a carcinoma.\\u000a \\u000a \\u000a \\u000a Methods  18 cases of gingival carcinoma were processed infiltrated mandible by 99mTc-MDP SPECT\\/CT fusion image and CT, and their scanning results compared with pathology findings.\\u000a \\u000a \\u000a \\u000a Results  Eleven of 13 cases with well-differentiated

  19. Concerted evolution of the tandemly repeated genes encoding primate U2 small nuclear RNA (the RNU2 locus) does not prevent rapid diversification of the (CT){sub n} {center_dot} (GA){sub n} microsatellite embedded within the U2 repeat unit

    SciTech Connect

    Liao, D.; Weiner, A.M. [Yale Univ., New Haven, CT (United States)] [Yale Univ., New Haven, CT (United States)

    1995-12-10

    The RNU2 locus encoding human U2 small nuclear RNA (snRNA) is organized as a nearly perfect tandem array containing 5 to 22 copies of a 5.8-kb repeat unit. Just downstream of the U2 snRNA gene in each 5.8-kb repeat unit lies a large (CT){sub n}{center_dot}(GA){sub n} dinucleotide repeat (n {approx} 70). This form of genomic organization, in which one repeat is embedded within another, provides an unusual opportunity to study the balance of forces maintaining the homogeneity of both kinds of repeats. Using a combination of field inversion gel electrophoresis and polymerase chain reaction, we have been able to study the CT microsatellites within individual U2 tandem arrays. We find that the CT microsatellites within an RNU2 allele exhibit significant length polymorphism, despite the remarkable homogeneity of the surrounding U2 repeat units. Length polymorphism is due primarily to loss or gain of CT dinucleotide repeats, but other types of deletions, insertions, and substitutions are also frequent. Polymorphism is greatly reduced in regions where pure (CT){sub n} tracts are interrupted by occasional G residues, suggesting that irregularities stabilize both the length and the sequence of the dinucleotide repeat. We further show that the RNU2 loci of other catarrhine primates (gorilla, chimpanzee, ogangutan, and baboon) contain orthologous CT microsatellites; these also exhibit length polymorphism, but are highly divergent from each other. Thus, although the CT microsatellite is evolving far more rapidly than the rest of the U2 repeat unit, it has persisted through multiple speciation events spanning >35 Myr. The persistence of the CT microsatellite, despite polymorphism and rapid evolution, suggests that it might play a functional role in concerted evolution of the RNU2 loci, perhaps as an initiation site for recombination and/or gene conversion. 70 refs., 5 figs.

  20. Diaphragmatic hernia: an unusual presentation

    PubMed Central

    Shah, Neha; Fernandes, Roland; Thakrar, Amit; Rozati, Hamoun

    2013-01-01

    A 53-year-old lady presented to A&E with a 3-day history of severe epigastric pain and vomiting. This was preceded by a 3-month history of generalised abdominal discomfort, early satiety and increasing shortness of breath. A CT scan showed a left-sided posterior diaphragmatic defect. Urgent repair of the hernia showed herniation of three-quarter of the stomach, half of the transverse colon, the 13?cm spleen and the pancreas in the chest. There were no postoperative complications. Traumatic diaphragmatic hernias are known to be a complication of major trauma. However, the patient in this case report presented acutely, after mild physical trauma related to using a rowing machine. This exercise, when not performed correctly can raise intra-abdominal pressure. It is plausible that this trauma, although mild, was sufficient in causing the lady's diaphragmatic hernia. This case would suggest that the trauma required to cause a diaphragmatic hernia need not be as severe as originally thought. PMID:23616319

  1. Rheological Characterization of Unusual DWPF Slurry Samples (U)

    SciTech Connect

    Koopman, D. C.

    2005-09-01

    A study was undertaken to identify and clarify examples of unusual rheological behavior in Defense Waste Processing Facility (DWPF) simulant slurry samples. Identification was accomplished by reviewing sludge, Sludge Receipt and Adjustment Tank (SRAT) product, and Slurry Mix Evaporator (SME) product simulant rheological results from the prior year. Clarification of unusual rheological behavior was achieved by developing and implementing new measurement techniques. Development of these new methods is covered in a separate report, WSRC-TR-2004-00334. This report includes a review of recent literature on unusual rheological behavior, followed by a summary of the rheological measurement results obtained on a set of unusual simulant samples. Shifts in rheological behavior of slurries as the wt. % total solids changed have been observed in numerous systems. The main finding of the experimental work was that the various unusual DWPF simulant slurry samples exhibit some degree of time dependent behavior. When a given shear rate is applied to a sample, the apparent viscosity of the slurry changes with time rather than remaining constant. These unusual simulant samples are more rheologically complex than Newtonian liquids or more simple slurries, neither of which shows significant time dependence. The study concludes that the unusual rheological behavior that has been observed is being caused by time dependent rheological properties in the slurries being measured. Most of the changes are due to the effect of time under shear, but SB3 SME products were also changing properties while stored in sample bottles. The most likely source of this shear-related time dependence for sludge is in the simulant preparation. More than a single source of time dependence was inferred for the simulant SME product slurries based on the range of phenomena observed. Rheological property changes were observed on the time-scale of a single measurement (minutes) as well as on a time scale of hours to weeks. The unusual shape of the slurry flow curves was not an artifact of the rheometric measurement. Adjusting the user-specified parameters in the rheometer measurement jobs can alter the shape of the flow curve of these time dependent samples, but this was not causing the unusual behavior. Variations in the measurement parameters caused the time dependence of a given slurry to manifest at different rates. The premise of the controlled shear rate flow curve measurement is that the dynamic response of the sample to a change in shear rate is nearly instantaneous. When this is the case, the data can be fitted to a time independent rheological equation, such as the Bingham plastic model. In those cases where this does not happen, interpretation of the data is difficult. Fitting time dependent data to time independent rheological equations, such as the Bingham plastic model, is also not appropriate.

  2. Severe and Unusual Weather Spring 2012

    E-print Network

    Droegemeier, Kelvin K.

    METR 2603 Severe and Unusual Weather Spring 2012 Instructors: Prof. Susan Postawko (spostawk: Meteorology 2603 is a survey course of the physical processes that are important in the formation of various

  3. Unusual Molecular Conformations in Fluorinated, Contorted

    E-print Network

    Hone, James

    Unusual Molecular Conformations in Fluorinated, Contorted Hexabenzocoronenes Yueh-Lin Loo,*, Anna M ABSTRACT Fluorinated, contorted hexabenzocoronenes (HBCs) have been synthesized in a facile manner via Suzuki-Miyaura coupling of fluorinated phenyl boronic acids followed by photocyclization and Scholl

  4. Unusual anatomic presentation of ectopic ureteroceles

    Microsoft Academic Search

    Eugene Minevich; Ali Moayed; Jeffrey Wacksman; Alfor G Lewis; Curtis A Sheldon

    1999-01-01

    The authors describe four patients with unusual anatomic presentation of ectopic ureteroceles and their surgical treatment. Over a 3-year period, four cases of unusual ectopic ureteroceles were encountered. A 6-month-old girl had a complex cloacal anomaly with an ectopic ureterocele within an ectopic ureterocele combined with a blind-ending ipsilateral ureter. A 3-year-old girl had an ectopic ureterocele combined with a

  5. Ten uncommon and unusual variants of renal angiomyolipoma (AML): radiologic-pathologic correlation.

    PubMed

    Schieda, N; Kielar, A Z; Al Dandan, O; McInnes, M D F; Flood, T A

    2015-02-01

    Classic (triphasic) renal angiomyolipoma (AML) is currently classified as a neoplasm of perivascular epithelioid cells. For diagnosis of AML, the use of thin-section non-contrast enhanced CT (NECT) improves diagnostic accuracy; however, identifying gross fat within a very small AML is challenging and often better performed with chemical-shift MRI. Although the presence of gross intra-tumoural fat is essentially diagnostic of AML; co-existing intra-tumoural fat and calcification may represent renal cell carcinoma (RCC). Differentiating AML from retroperitoneal sarcoma can be difficult when AML is large; the feeding vessel and claw signs are suggestive imaging findings. AML can haemorrhage, with intra-tumoural aneurysm size >5 mm a more specific predictor of future haemorrhage than tumor size >4 cm. Diagnosis of AML in the setting of acute haemorrhage is complex; comparison studies or follow-up imaging may be required. Not all AML contain gross fat and imaging features of AML without visible fat overlap with RCC; however, homogeneity, hyperdensity at NECT, low T2-weighted signal intensity and, microscopic fat are suggestive features. Patients with tuberous sclerosis often demonstrate a combination of classic and minimal fat AML, but are also at a slightly increased risk for RCC and should be imaged cautiously. Several rare pathological variants of AML exist including AML with epithelial cysts and epithelioid AML, which have distinct imaging characteristics. Classic AML, although benign, can be locally invasive and the rare epithelioid AML can be frankly malignant. The purpose of this review is to highlight the imaging manifestations of 10 uncommon and unusual variants of AML using pathological correlation. PMID:25468637

  6. Clinical Performance of PET\\/CT in Evaluation of Cancer: Additional Value for Diagnostic Imaging and Patient Management

    Microsoft Academic Search

    Rachel Bar-Shalom; Nikolai Yefremov; Ludmila Guralnik; Diana Gaitini; Alex Frenkel; Abraham Kuten; Hernan Altman; Zohar Keidar; Ora Israel

    2003-01-01

    This study assessed the clinical performance of a combined PET\\/CT system using 18F-FDG in oncologic patients. Methods: 18F-FDG PET\\/CT was used to evaluate 204 patients with 586 suspicious lesions. All patients had available follow-up data, enabling assessment of the clinical significance of hybrid PET\\/CT findings. Differences in interpretation between PET, CT, and fused PET\\/CT data were prospectively documented for detection,

  7. Imaging findings of extrapulmonary metastases of osteosarcoma

    Microsoft Academic Search

    Jung-Ah Choi; Sang Hyun Lee; Ja Young Choi; Sung Hwan Hong; Hye Won Chung; Heung Sik Kang

    2004-01-01

    Purpose: To review imaging findings of extrapulmonary metastasis from osteosarcoma and to evaluate them for any consistent pattern and correlation between imaging findings. Materials and methods: This study was retrospectively conducted in 13 patients with extrapulmonary metastasis of pathologically confirmed osteosarcoma. We evaluated the radioisotope (RI) scans (n=16), ultrasonography (USG) (n=4), computed tomography (CT) scans (n=10), MRIs (n=6), clinical records,

  8. An unusual origin of the celiac trunk and the superior mesenteric artery in the thorax.

    PubMed

    Matusz, Petru; Iacob, Nicoleta; Miclaus, Gratian D; Pureca, Ana; Ples, Horia; Loukas, Marios; Tubbs, R Shane

    2013-11-01

    The authors report a case of a 44-year-old male found to have unusual origins of the celiac trunk (CT) and superior mesernteric artrery (SMA) as revealed by routine multidetector computed tomograph (MDCT) angiography. The CT and SMA originate from the thoracic aorta (TA) 21 mm and 9 mm above the aortic hiatus, respectively. The median arcuate ligament (MAL) is located at the level of the L1-L2 intervertebral disc. The course of the CT descends in the thoracic cavity making a 14° acute downward angle in front of the TA; below the level of the MAL, the CT descends, making an angle of 47°. The course of the SMA descends at both the thoracic and abdominal level making an angle of 17°, and having an aortomesenteric distance of 9 mm at the level of the third part of the duodenum. In the present case, the supradiaphragmatic origin of the CT and the SMA was determined by their incomplete caudal descent, associated with a pronounced apparent descent of the diaphragm. A thoracic origin of the CT and SMA and the acute downward aortomesenteric angle (17°) associated with a reduced aortomesenteric distance at the level of the third part of the duodenum (9 mm), although no clinical signs are present, may predispose the patient to develop simultaneously a triple syndrome: the compression of CT by MAL (celiac axis compression syndrome), the compression of SMA by MAL (superior mesenteric artery compression syndrome), and the compression of the duodenum by the SMA (superior mesenteric artery syndrome). PMID:24108529

  9. Orodental findings in postaxial acrofacial dysostosis

    PubMed Central

    Urs, Aadithya B; Kumar, Priya; Nunia, Kalpana

    2014-01-01

    We report a new case of postaxial acrofacial dysostosis (Miller) syndrome with expanded profile. The patient presented with unusual orofacial and digital anomalies along with mental retardation. This report emphasizes the recognized features of the syndrome as well as describes intraoral findings that could aid in the diagnosis and management of these patients. PMID:24959059

  10. Dose management in CT facility

    Microsoft Academic Search

    V Tsapaki; M Rehani

    2007-01-01

    Computed Tomography (CT) examinations have rapidly increased in number over the last few years due to recent advances such as the spiral, multidetector-row, CT fluoroscopy and Positron Emission Tomography (PET)-CT technology. This has resulted in a large increase in collective radiation dose as reported by many international organisations. It is also stated that frequently, image quality in CT exceeds the

  11. Finding Factors

    NSDL National Science Digital Library

    2011-05-24

    This lesson is designed to develop students' abilities to find factors of whole numbers. The lesson also introduces prime numbers. This lesson provides links to discussions and activities related to factors as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  12. [Silicosis: computed tomography findings].

    PubMed

    González Vázquez, M; Trinidad López, C; Castellón Plaza, D; Calatayud Moscoso Del Prado, J; Tardáguila Montero, F

    2013-01-01

    Silicosis is an occupational lung disease, which is caused by the inhalation of silica and affects a wide range of jobs. There are many clinical forms of silicosis: acute silicosis, results from exposure to very large amounts of silica dust over a period of less than 2 years. Simple chronic silicosis, the most common type that we see today, results from exposure to low amounts of silica between 2 and 10 years. Chronic silicosis complicated, with silicotic conglomerates. In many cases the diagnosis of silicosis is made according to epidemiological and radiological data, without a histological confirmation. It is important to know the various radiological manifestations of silicosis to differentiate it from other lung diseases and to recognize their complications. The objective of this work is to describe typical and atypical radiological findings of silicosis and their complications in helical and high resolution (HRCT) thorax CT. PMID:22884889

  13. Normal Chest CT

    NSDL National Science Digital Library

    Shaffer, Kitt

    Set of normal chest CT images with various important anatomic structures outlined, for cine viewing to gain a 3D view of the structure and its relationship to adjacent organs.Annotated: trueDisease diagnosis: Normal

  14. Normal Abdominal CT

    NSDL National Science Digital Library

    Shaffer, Kitt

    Set of normal abdominal CT images with various important anatomic structures outlined, for cine viewing to gain a 3D view of the structure and its relationship to adjacent organs.Annotated: trueDisease diagnosis: Normal

  15. Arm CT scan

    MedlinePLUS

    CAT scan - arm; Computed axial tomography scan - arm; Computed tomography scan - arm; CT scan - arm ... your health care provider if you take the diabetes drug metformin (Glucophage). You may need to special ...

  16. Leg CT scan

    MedlinePLUS

    CAT scan - leg; Computed axial tomography scan - leg; Computed tomography scan - leg; CT scan - leg ... your health care provider if you take the diabetes medicine metformin (Glucophage). You may need to take ...

  17. Thoracic spine CT scan

    MedlinePLUS

    CAT scan - thoracic spine; Computed axial tomography scan - thoracic spine; Computed tomography scan - thoracic spine; CT scan - ... your health care provider if you take the diabetes medication metformin (Glucophage).You may need to take ...

  18. Small bowel obstruction due to phytobezoar: CT diagnosis

    Microsoft Academic Search

    Tulin Yildirim; Sedat Yildirim; Ozlem Barutcu; Levent Oguzkurt; Turgut Noyan

    2002-01-01

    .   Small bowel phytobezoars are rare and are almost always obstructive. The literature contains few reports on the radiological\\u000a findings for primary small bowel bezoars. There is also very little published on CT results with this lesion, but the features\\u000a of the scan are characteristic. We present the CT findings in a patient with an obstructive small bowel phytobezoar, and

  19. Intraabdominal panniculitis: clinical, radiographic, and CT features

    SciTech Connect

    Katz, M.E.; Heiken, J.P.; Glazer, H.S.; Lee, J.K.T.

    1985-08-01

    Intraabdominal panniculitis, also known as lipodystrophy, is an inflammatory condition of adipose tissue that may result in development of large masses containing necrotic fat (nodular intraabdominal panniculitis). Symptoms are secondary to inflammation or mass effect on adjacent organs. Barium studies may show nonspecific inflammatory changes and displacement of bowel loops. Computed tomography (CT) demonstrates inhomogeneous masses containing fat and soft tissue density. The diagnosis of intraabdominal panniculitis has seldom been made prospectively. However, the CT findings are characteristic and can aid in the evaluation and management of patients with this disease.

  20. Choroidal detachment and ocular hypotony: CT evaluation

    SciTech Connect

    Mafee, M.F.; Peyman, G.A.

    1984-12-01

    The computed tomographic (CT) findings in 20 patients with hemorrhagic choroidal detachment, serous choroidal detachment and/or ocular hypotony are described. Hemorrhagic choroidal detachment appeared as an area of high attenuation that was usually localized, uniformly hyperdense, and not position-dependent. Serous choroidal detachment appeared as a convex, thick line of increased density within the vitreous cavity. Inflammatory choroidal detachment produces a diffuse intrauveal and suprachoroidal accumulation of high-density, position-dependent fluid, and uveoscleral thickening and enhancement, which in cross section resembles a ring. CT has proved valuable in localizing and differentiating serous or hemorrhagic choroidal detachment and uveoscleral infolding.

  1. Caroli disease: central dot sign in CT.

    PubMed

    Choi, B I; Yeon, K M; Kim, S H; Han, M C

    1990-01-01

    Two adults with communicating cavernous ectasia of the biliary tract (Caroli disease) are described. Both patients had the pure form of the disease, characterized by saccular dilatation of intrahepatic bile ducts, multiple intrahepatic calculi, absence of portal hypertension, and associated cystic renal disease. Computed tomographic (CT) scans of the liver showed tiny dots with strong contrast enhancement within dilated intrahepatic bile ducts (the central dot sign). These intraluminal dots on CT scans corresponded to intraluminal portal veins on sonograms, findings indicating portal radicles surrounded by dilated intrahepatic bile ducts. PMID:2294544

  2. The cruel and unusual phenomenology of solitary confinement

    PubMed Central

    Gallagher, Shaun

    2014-01-01

    What happens when subjects are deprived of intersubjective contact? This paper looks closely at the phenomenology and psychology of one example of that deprivation: solitary confinement. It also puts the phenomenology and psychology of solitary confinement to use in the legal context. Not only is there no consensus on whether solitary confinement is a “cruel and unusual punishment,” there is no consensus on the definition of the term “cruel” in the use of that legal phrase. I argue that we can find a moral consensus on the meaning of “cruelty” by looking specifically at the phenomenology and psychology of solitary confinement. PMID:24971072

  3. Computational investigation of unusual behavior in certain capillary tubes

    SciTech Connect

    Brady, Victor; Concus, Paul; Finn, Robert

    2004-03-12

    We investigate computationally two recent mathematical findings involving unusual behavior of solutions of the Young-Laplace capillary equation in cylindrical tubes of particular sections. The first concerns a configuration for which smoothing of the boundary curve at a sharp corner leads from existence to non-existence of a solution over the container section in zero gravity. The second describes a discontinuous behavior of relative rise height in nesting tubes placed vertically in an infinite reservoir. The numerical results support and quantify the mathematical predictions.

  4. The cruel and unusual phenomenology of solitary confinement.

    PubMed

    Gallagher, Shaun

    2014-01-01

    What happens when subjects are deprived of intersubjective contact? This paper looks closely at the phenomenology and psychology of one example of that deprivation: solitary confinement. It also puts the phenomenology and psychology of solitary confinement to use in the legal context. Not only is there no consensus on whether solitary confinement is a "cruel and unusual punishment," there is no consensus on the definition of the term "cruel" in the use of that legal phrase. I argue that we can find a moral consensus on the meaning of "cruelty" by looking specifically at the phenomenology and psychology of solitary confinement. PMID:24971072

  5. CT of pituitary abscess

    SciTech Connect

    Fong, T.C.; Johns, R.D.; Long, M.; Myles, S.T.

    1985-06-01

    Pituitary abscess is a rare condition, with only 50 cases reported in the literature. Of those, 29 cases were well documented for analysis. Preoperative diagnosis of pituitary abscess is difficult. The computed tomographic (CT) appearance of pituitary abscess was first described in 1983; the abscess was depicted by axial images with coronal reconstruction. The authors recently encountered a case of pituitary abscess documented by direct coronal CT of the sella turcica.

  6. Improvement in CT pelvimetry

    SciTech Connect

    Wiesen, E.J.; Crass, J.R.; Bellon, E.M.; Ashmead, G.G.; Cohen, A.M. (Case Western Reserve Univ., Cleveland, OH (USA))

    1991-01-01

    When computed tomographic (CT) digital radiography is used for pelvimetry, measurement error may occur. Geometric distortion in the lateral direction of the CT digital radiograph can lead to an error in any measurement of the transverse pelvic inlet. The authors measured the magnitude of this error on two scanners and present a general method for correction of this potential error. The authors also showed that an additional dose reduction is possible if the patient is imaged in the posteroanterior rather than anteroposterior projection.

  7. -CT CT)Computed Tomography(. ,. , -100 ,

    E-print Network

    Pinsky, Ross

    sigma . ." , : ·B.sc "BA- · " Lean/six sigma - ·-Green/Black Belt ·. · , , .' , ·" . " * . : ·) B.A ,(-. ·4-6. ·) QFD, CtQ breakdown, DfSS, SPC, AQP, FMEA, Control Plan.( ·Six Sigma GB/EE/Mechanics/Physics/SW/Algorithms/Materials /Application Development) · · - · · Process Improvement Engineer : · . · -six

  8. Use of CT in the evaluation of cochlear otosclerosis

    SciTech Connect

    Mafee, M.F.; Valvassori, G.E.; Deitch, R.L.; Norouzi, P.; Henrikson, G.C.; Capek, V.; Applebaum, E.L.

    1985-09-01

    Otosclerosis (otospongiosis) occurs when the hard endochondral bone of the otic capsule is replaced by spongy vascular foci of haversian bone. Using computed tomography (CT), the authors studied the ears of 32 selected patients with mixed or sensorineural hearing loss; 24 were suspected of having otosclerosis. CT proved valuable in detecting cochlear otosclerosis, foci of demineralization, and changes in bony texture and enables the easy recognition of subtle radiographic findings. This paper also reports the CT findings of temporal bones in osteogenesis imperfecta and Paget disease.

  9. Main Findings

    Cancer.gov

    This study looked at the ALTS patients with ASCUS who were found to have a precancerous lesion when they underwent colposcopy and biopsy. Its purpose was to find out how sensitive HPV testing was at identifying these women compared to repeat Pap testing. The study found that HPV testing was 96-percent sensitive - that is, identified 96% of the women with ASCUS who had a precancerous lesion. The authors concluded that HPV testing is a viable option for the management of ASCUS.

  10. Factor Findings

    NSDL National Science Digital Library

    Jamie Piecora

    2000-01-01

    In this lesson, students first create factor posters for a variety of different numbers that will be displayed in the classroom to be utilized as a resource throughout the school year. They make discoveries about factors using color tiles, represent their discoveries using graph paper, and display their information on poster board as find factors of an assigned number. The plan includes a list of materials, questions, assessment options, and extensions.

  11. Finding Colors

    NSDL National Science Digital Library

    Sciencenter

    2014-08-27

    In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors. Using vinegar, washing soda, and Bogen universal indicator, the goal is to find combinations that create red, orange, yellow, green, and blue solutions. Background information explains a little about how acids and bases interact to affect the pH of a solution, and how the indicator changes color based on the pH. Safety notes are included.

  12. Fossil Find

    NSDL National Science Digital Library

    In this classroom activity, middle school students simulate a "dinosaur dig." The activity opens with background information for teachers about fossils. Working in groups, students excavate fossil sites created in advance by the teacher, or other group of students, and try to reconstruct a chicken skeleton. The activity closes with a two-page student worksheet that directs students to diagram the fossil site and includes probing questions to help them decode their findings.

  13. PET CT: Evolving role in hadron therapy

    NASA Astrophysics Data System (ADS)

    Levy, Richard P.

    2007-08-01

    Computer-assisted fused-image and/or single-machine-integrated PET-CT can show early tissue biochemical changes with improved anatomic resolution, often before there is any structural change. This approach enables the clinician to view and assess the patient's body from a biochemical perspective. In an era of rapidly evolving 3D-conformal hadron treatment, accurate target delineation is a crucial factor in optimization of clinical results. Using PET-CT for better target delineation improves the ability to escalate tumor dose and to minimize dose to adjacent normal tissues, thereby enhancing the potential for improved efficacy of hadron therapy. This paper reviews some of the basic-science underpinnings of PET-CT, and highlights some important findings in the early clinical work thus far performed.

  14. Hepatic metastasis disguised as fat spared area in the background of fatty liver: Detection on FDG PET/CT.

    PubMed

    Puranik, Ameya D; Purandare, Nilendu C; Agrawal, Archi; Shah, Sneha; Rangarajan, Venkatesh

    2013-04-01

    Area of fat sparing in fatty liver is known to pose a diagnostic challenge in an oncological setting, especially in cancers with higher propensity for liver metastases. We report an unusual appearance of hepatic metastases in a fat spared area, on both computed tomography (CT) and positron emission tomography (PET), in a combined 18 fluorine-fluorodeoxyglucose (18 F-FDG) PET/CT study done in metastatic adenocarcinoma of colon. PMID:24163515

  15. Unusual delayed presentation of head trauma complicating outcome of facial nerve decompression surgery.

    PubMed

    Thakur, J S; Shekar, Vidya; Saluja, Manika; Mohindroo, N K

    2013-01-01

    Late presentation of head trauma is rare. A young boy presented with a traumatic facial paralysis after head trauma. A CT scan of the head showed temporal bone fracture without intracranial insult. Facial nerve decompression was performed and paralysis started improving. However, he presented with vertigo and sensorineural hearing loss after 2 months. Clinical examination also showed cerebellar sign. We suspected iatrogenic injury to the cochlea; however, brain MRI showed haemorrhage in the area of anterior inferior cerebellar artery. The patient was managed conservatively and the vertigo improved. This case stresses on unusual late presentation of head trauma and cerebellar artery injury that complicated the outcome of facial nerve paralysis. PMID:23964046

  16. Unusual grooved styloid process in a human skull: morphological details and clinical implications.

    PubMed

    Arora, J; Mehta, V; Suri, R K; Rath, G; Roy, S; Dhuria, R; Nayyar, A; Baliyan, R; Das, S

    2011-01-01

    The temporal Styloid Process is an important anatomical landmark for surgeons while performing skull based surgery, for anaesthetists while injecting local anaesthetic solution and for radiologists during interpretation of CT and MRI scans. Knowledge of morphological variations of the styloid process such as a unique groove on its posterior aspect as seen in the present case not only has great clinical implications but is also of academic interest. The present article describes in detail an unusual groove in the styloid process with an additional anterior angulation at its tip. The morphological features, embryological basis and clinical relevance is discussed in details. PMID:21717046

  17. UNUSUAL CAUSES OF CUTANEOUS ULCERATION

    PubMed Central

    Panuncialman, Jaymie; Falanga, Vincent

    2010-01-01

    Synopsis Skin ulceration is a major source of morbidity and is often difficult to manage. Ulcers due to an inflammatory etiology or microvascular occlusion are particularly challenging in terms of diagnosis and treatment. The management of such ulcers requires careful assessment of associated systemic conditions and a thorough analysis of the ulcer's clinical and histologic findings. In this report, we discuss several examples of inflammatory ulcers and the approach to their diagnosis and treatment. PMID:21074034

  18. Acute diverticulitis of the terminal ileum: ultrasonography and CT findings

    PubMed Central

    2015-01-01

    We describe a rare case of terminal ileal diverticulitis in a 68-year-old female with a day of history Epub ahead of print of right lower quadrant pain and tenderness, mimicking acute appendicitis. Ultrasonography revealed small sac-like out-pouching lesions with increased echogenicity of surrounding fat in thickened terminal ileum, suggesting inflamed diverticula. We diagnosed terminal ileal diverticulitis primarily by ultrasonography. The diagnosis was confirmed by subsequent computed tomography. PMID:25475648

  19. CT Scans - Multiple Languages: MedlinePlus

    MedlinePLUS

    ... ?????? ???????? ????????? - ??????? Bilingual PDF Health Information Translations CT Scan English (Arabic) ??????? ?????? ??????? - ??????? ... ?? - ???? (Chinese - Simplified) Bilingual PDF Health Information Translations Chinese - Traditional (????) CT (Computerized Tomography) Scan CT ( ...

  20. The need for skull radiography in patients presenting for CT

    SciTech Connect

    Tress, B.M.

    1983-01-01

    One thousand patients had both CT of the head and a conventional skull series of radiographs. Radiographic findings were abnormal in 250 patients (25%), but only 64 patients (6.4%) had diagnostically significant abnormalities at radiography that were not detected by CT. If the 163 patients who presented after acute trauma were excluded from the series, only 39 (4.7%) of the remaining patients had radiographically significant abnormal findings that were not seen at CT, and only two (0.2%) of these abnormalities could not be diagnosed by a lateral skull radiograph alone. In only five patients (0.5%) was the management actively changed because an abnormaltiy that was detected at skull radiography was not detected at CT. Thus, in nontrauma patients who have stroke, epilepsy, dementia, or non-specific symptoms without focal signs, or have recently undergone craniotomy, and who have been referred for CT, skull radiographs are not justified. In the patient with a history and findings that are strongly suggestive of a pathological disorder anywhere other than in the sella turcica, cerebello-pontine angle, and paranasal sinuses, only the lateral skull radiograph should be obtained after CT, and only if CT is equivocal.

  1. Unusual raptor nests around the world

    USGS Publications Warehouse

    Ellis, D.H.; Craig, T.; Craig, E.; Postupalsky, S.; LaRue, C.T.; Nelson, R.W.; Anderson, D.W.; Henny, C.J.; Watson, J.; Millsap, B.A.; Dawson, J.W.; Cole, K.L.; Martin, E.M.; Margalida, A.; Kung, P.

    2009-01-01

    From surveys in many countries, we report raptors using unusual nesting materials (e.g., paper money, rags, metal, antlers, and large bones) and unusual nesting situations. For example, we documented nests of Steppe Eagles Aquila nipalensis and Upland Buzzards Buteo hemilasius on the ground beside well-traveled roads, Saker Falcon Falco cherrug eyries in attics and a cistern, and Osprey Pandion haliaetus nests on the masts of boats and on a suspended automobile. Other records include a Golden Eagle A. chrysaetos nest 7.0 m in height, believed to be the tallest nest ever described, and, for the same species, we report nesting in rudimentary nests. Some nest sites are within a few meters of known predators or competitors. These unusual observations may be important in revealing the plasticity of a species' behavioral repertoire. ?? 2009 The Raptor Research Foundation, Inc.

  2. Comparison between helical computed tomography angiography and intraoperative findings

    PubMed Central

    Shetty, Abijit; Adiyat, Kishore Thekhe

    2014-01-01

    Background: Live donor nephrectomy has gained popularity on account of the laparoscopic technique, to overcome a small donor pool. Laparoscopic donor nephrectomy requires a precise study of the vascular and morphological renal anatomy, as laparoscopy is technically challenging due to the limited field of vision. In-depth knowledge of the renal anatomy before a laparoscopic procedure is essential for a successful transplant. The left kidney is preferred over the right even in cases of multiple vessels because of the long renal vein, which requires precise preoperative vascular mapping. Helical computerized tomography (CT) angiography, with its axial, coronal, and 3D reconstruction, gives a better understanding of renal anatomy. There are instances where the helical CT findings are misleading and less informative in a small number of cases. This study highlights a case study of the helical CT findings compared with the intraoperative findings of 200 live donors, who underwent laparoscopic donor nephrectomy, and the renal anatomy has been understood at the same time. Aims: 1. To compare the helical CT findings on the operated side with the intraoperative findings. 2. To analyze the CT findings Materials and Methods: Two hundred cases of laparoscopic transperitoneal donor nephrectomy were included in this study. Statistical Method Used: Chi square test was the statistical test used to compare the findings between CT and the intraoperative data. Results: The axial, coronal, and 3D images of the CT findings were on par with the intraoperative findings in most of the cases. Incidental findings help in the better planning of surgery. Multiple vessels on the left side are preferred over the right sided normal anatomy; with not much technical difficulty with the aid of a helical CT. Male donors had more incidences of multiple vessels, gonadal vein, Retroaortic Renal Vein (RARV), lumbar vein, and duplication of ureter, compared to females. Furthermore, these variations are more in the left side donors. Ninety-two percent of the cases in this study are left-sided donors. The helical CT finding shows that renal vein variations are more on the right side. Conclusions: Helical CT is important in delineating the arterial, venous, and ureteral anatomy and can show the important incidental findings. Left renal donors and males have more variations in their renal anatomy. Technically challenging laparoscopic nephrectomy on the multiple-vessel-side donor is possible with the aid of helical CT. The importance of the CT in evaluating donor renal anatomy for a technically challenging laparoscopic donor nephrectomy is commendable. PMID:25136246

  3. Finding Fossils

    NSDL National Science Digital Library

    This OLogy activity serves as a kid-friendly how-to manual about searching for fossils. In Not Just Any Rock Will Do, kids learn that fossils "hide out" in sedimentary rock and see examples of shale and sandstone. Do's and Don'ts for Fossil Hunters gives kids practical tips and a list of fossil-hunting supplies. In Fossils You May Find, there are photos of common invertebrate, vertebrate, and plant fossils to guide kids. Paleontology Clubs and Web Sites lists resources to help kids determine where to hunt for fossils. In Keeping a Field Journal, kids are shown a sample journal entry that points out the types of information they should record.

  4. Finding food

    PubMed Central

    Forsyth, Ann; Lytle, Leslie; Riper, David Van

    2011-01-01

    A significant amount of travel is undertaken to find food. This paper examines challenges in measuring access to food using Geographic Information Systems (GIS), important in studies of both travel and eating behavior. It compares different sources of data available including fieldwork, land use and parcel data, licensing information, commercial listings, taxation data, and online street-level photographs. It proposes methods to classify different kinds of food sales places in a way that says something about their potential for delivering healthy food options. In assessing the relationship between food access and travel behavior, analysts must clearly conceptualize key variables, document measurement processes, and be clear about the strengths and weaknesses of data. PMID:21837264

  5. Using Helical CT to Predict Stone Fragility in Shock Wave Lithotripsy (SWL)

    SciTech Connect

    Williams, James C. Jr.; Zarse, Chad A.; Jackson, Molly E.; McAteer, James A. [Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202 (United States); Lingeman, James E. [Methodist Hospital Institute for Kidney Stone Disease, 1801 North Senate Boulevard, Suite 220, Indianapolis, Indiana 46202 (United States)

    2007-04-05

    Great variability exists in the response of urinary stones to SWL, and this is true even for stones composed of the same mineral. Efforts have been made to predict stone fragility to shock waves using computed tomography (CT) patient images, but most work to date has focused on the use of stone CT number (i.e., Hounsfield units). This is an easy number to measure on a patient stone, but its value depends on a number of factors, including the relationship of the size of the stone to me resolution (i.e., the slicewidth) of the CT scan. Studies that have shown a relationship between stone CT number and failure in SWL are reviewed, and all are shown to suffer from error due to stone size, which was not accounted for in the use of Hounsfield unit values. Preliminary data are then presented for a study of calcium oxalate monohydrate (COM) stones, in which stone structure-rather than simple CT number values-is shown to correlate with fragility to shock waves. COM stones that were observed to have structure by micro CT (e.g., voids, apatite regions, unusual shapes) broke to completion in about half the number of shock waves required for COM stones that were observed to be homogeneous in structure by CT. This result suggests another direction for the use of CT in predicting success of SWL: the use of CT to view stone structure, rather than simply measuring stone CT number. Viewing stone structure by CT requires the use of different viewing windows than those typically used for examining patient scans, but much research to date indicates that stone structure can be observed in the clinical setting. Future clinical studies will need to be done to verify the relationship between stone structure observed by CT and stone fragility in SWL.

  6. Soft tissue imaging with photon counting spectroscopic CT.

    PubMed

    Shikhaliev, Polad M

    2015-03-21

    The purpose of this work was experimental investigation of photon counting spectroscopic CT (PCS-CT) imaging of anatomical soft tissue with clinically relevant size. The imaging experiments were performed using a spectroscopic CT system based on CdZnTe photon counting detector with two rows of pixels, 256 pixels in each row, 1? × ?1?mm(2)?pixel size, and 25.6?cm detector length. The detector could split the x-ray energy spectrum to 5 regions (energy bins), and acquire 5 multi-energy (spectroscopic) CT images in a single CT scan. A sample of round shaped anatomical soft tissue of 14?cm diameter including lean and fat was used for imaging. To avoid the negative effect of anatomical noise on quantitative analysis, a spectroscopic CT phantom with tissue equivalent solid materials was used. The images were acquired at 60, 90, and 120?kVp tube voltages, and spectroscopic image series were acquired with 3 and 5 energy bins. Spectroscopic CT numbers were introduced and used to evaluate an energy selective image series. The anatomical soft tissue with 14?cm diameter was visualized with good quality and without substantial artifacts by the photon counting spectroscopic CT system. The effects of the energy bin crosstalk on spectroscopic CT numbers were quantified and analyzed. The single and double slice PCS-CT images were acquired and compared. Several new findings were observed, including the effect of soft tissue non-uniformity on image artifacts, unique status of highest energy bin, and material dependent visualization in spectroscopic image series. Fat-lean decomposition was performed using dual energy subtraction and threshold segmentation methods, and compared. Using K-edge filtered x-rays improved fat-lean decomposition as compared to conventional x-rays. Several new and important aspects of the PCS-CT were investigated. These include imaging soft tissue with clinically relevant size, single- and double-slice PCS-CT imaging, using spectroscopic CT numbers to quantify multi-energy PCS-CT images, application of K-edge filtered x-rays for improved soft tissue decomposition, and several others. The study suggests that the presented PCS-CT technology meets the requirements of a particular clinical application, i.e. dedicated breast CT. PMID:25739788

  7. Soft tissue imaging with photon counting spectroscopic CT

    NASA Astrophysics Data System (ADS)

    Shikhaliev, Polad M.

    2015-03-01

    The purpose of this work was experimental investigation of photon counting spectroscopic CT (PCS-CT) imaging of anatomical soft tissue with clinically relevant size. The imaging experiments were performed using a spectroscopic CT system based on CdZnTe photon counting detector with two rows of pixels, 256 pixels in each row, 1? × ?1?mm2?pixel size, and 25.6?cm detector length. The detector could split the x-ray energy spectrum to 5 regions (energy bins), and acquire 5 multi-energy (spectroscopic) CT images in a single CT scan. A sample of round shaped anatomical soft tissue of 14?cm diameter including lean and fat was used for imaging. To avoid the negative effect of anatomical noise on quantitative analysis, a spectroscopic CT phantom with tissue equivalent solid materials was used. The images were acquired at 60, 90, and 120?kVp tube voltages, and spectroscopic image series were acquired with 3 and 5 energy bins. Spectroscopic CT numbers were introduced and used to evaluate an energy selective image series. The anatomical soft tissue with 14?cm diameter was visualized with good quality and without substantial artifacts by the photon counting spectroscopic CT system. The effects of the energy bin crosstalk on spectroscopic CT numbers were quantified and analyzed. The single and double slice PCS-CT images were acquired and compared. Several new findings were observed, including the effect of soft tissue non-uniformity on image artifacts, unique status of highest energy bin, and material dependent visualization in spectroscopic image series. Fat–lean decomposition was performed using dual energy subtraction and threshold segmentation methods, and compared. Using K-edge filtered x-rays improved fat–lean decomposition as compared to conventional x-rays. Several new and important aspects of the PCS-CT were investigated. These include imaging soft tissue with clinically relevant size, single- and double-slice PCS-CT imaging, using spectroscopic CT numbers to quantify multi-energy PCS-CT images, application of K-edge filtered x-rays for improved soft tissue decomposition, and several others. The study suggests that the presented PCS-CT technology meets the requirements of a particular clinical application, i.e. dedicated breast CT.

  8. On the unusual characteristics of the diamonds from Letšeng-la-Terae kimberlites, Lesotho

    NASA Astrophysics Data System (ADS)

    Bowen, Debbie C.; Ferraris, Ray D.; Palmer, Claire E.; Ward, John D.

    2009-11-01

    The Letšeng-la-Terae kimberlites are situated 3100 m above sea level in the Maloti Mountains of Lesotho, southern Africa. The principal economic bodies are two Late Cretaceous, low grade, 1-3.5 carats/hundred ton (cpht), kimberlite pipes that host high-value diamonds realising US 2000-2500/carat (/ct) in 2008 terms. Locally, the larger kimberlite body is referred to as the Main Pipe (17.2 ha) and the smaller one is called the Satellite Pipe (5.2 ha). These pipes, and their associated eluvial and proximal alluvial deposits, are renowned for yielding large, "D" colour, gem quality diamonds, including + 100 carat (ct) stones. Earlier artisanal effort (1959-1977) and formal mining (1977-1982) produced 335,000 carats (cts), including the 601 ct Lesotho Brown in 1968. In 2003, Letšeng Diamonds Limited re-commenced mining operations and had produced 265,000 cts by the end of July 2008, including 24 + 100 ct diamonds, the largest of which was the 603 ct Lesotho Promise. We report here on the unusual characteristics of the Letšeng diamond population that include: 75% gem quality that is more commonly associated with alluvial diamond deposits, large average stone size of ca. 1 carat/stone (ct/stn) that is also more typical of certain alluvial diamond placers, high-yielding, rounded to flattened irregular, resorbed dodecahedral shapes (Main Pipe 67% and Satellite Pipe 87%) with subordinate dodecahedral macle (Main Pipe 32% and Satellite Pipe 12%) and broken (ca. 1%) forms. In both pipes the octahedral component is virtually absent (< 0.1%), economically favourable colour mix (ca. 33% white colour diamonds in both pipes), abundance of nitrogen-free, "D" colour, Type IIa diamonds that dominate the internationally recognised "special" stone size fraction which covers all diamonds larger than + 10.8 cts (Main Pipe 32% and Satellite Pipe 51%). During 2008, these larger, "special" diamonds commanded prices in excess of US 15,000/ct, contributing ca. 75% of the revenue generated by the Letšeng mine. Furthermore, of the 24 + 100 ct diamonds recovered between November 2003 and July 2008, 18 (75%) were Type IIa "D" colour diamonds that also fetched prices mostly in excess of US 25,000/ct. Therefore the Type IIa diamonds boost significantly the revenue per unit measure (in this case, the US$/ton) of the Letšeng-la-Terae pipes, making these low grade kimberlites economic to mine.

  9. Parotid gland metastasis - an unusual presentation of adenocarcinoma of lung.

    PubMed

    Debnath, C R; Shahjahan, S M; Debnath, M R; Alam, M M; Moshwan, M M; Khan, M F; Rana, M S; Himel, R R; Ahmed, S

    2015-01-01

    Lung cancer is the most frequent malignant disease and the most common cause of cancer death in the world. Primary carcinoma of the lung was an uncommon cancer until the 1930s. Common cell types in bronchial carcinoma are squamous 35%, Adenocarcinoma 30%, Small-cell 20%, Large-cell 15%. We present a case of a bronchial neoplasm metastasis to the parotid gland. A 50 years old male patient presented with a 7×5cm painless parotid mass that was metastatic adenocarcinoma on histopathology. Then we thoroughly examined the patient and he was investigated accordingly. There was an abnormal shadow in the lung on chest x-ray, CT revealed a lung tumour on left side. Metastasis to the parotid gland from any distant primary site is quite unusual. We are going to present this case in the journal because of its rarity. Parotid gland metastasis from the lung is rare & if a careful examination is not performed primary focus may be overlooked, negatively affecting the lifetime survival rate & the prognosis of the patient. PMID:25725686

  10. On the merits of ``Unusual Field Trips''

    NASA Astrophysics Data System (ADS)

    Howarth, Dean E.

    1999-11-01

    This note is a synopsis of an ``unusual field trip'' (as it is categorized by our county's office of risk management) taken by a group of physics students to New Mexico during their 1998 spring break. On our four-day trip we visited points of scientific interest related to the Manhattan Project and astronomy.

  11. Neonatal splenic rupture: an unusual manifestation

    Microsoft Academic Search

    David Bader; Jorge G. Mogilner; Anna Berger; Samuel Eldar; Daniel Reich; Leonardo Siplovich

    1993-01-01

    Neonatal splenic rupture is relatively rare [4] and is usually associated with a traumatic delivery [3]. The clinical manifestation are those of hemorrhage and hypovolemic shock. We present two unusual cases of spontaneous neonatal splenic rupture whose initial clinical manifestation was a hematocele of the scrotal sac. The clinical presentation, diagnostic approach, and management of such cases is discussed with

  12. An unusual case of visual perseveration.

    PubMed Central

    Cleland, P G; Saunders, M; Rosser, R

    1981-01-01

    A patient is described with an unusual type of visual perseveration caused by a right parietal infarct. The mechanism of visual perseveration is discussed with particular reference to the increased movement of the perseverated image which our patient described. Images PMID:7229650

  13. Unusual manifestation of Marden-Walker syndrome

    PubMed Central

    Taksande, Amar M.; Vilhekar, K. Y.

    2012-01-01

    Marden-Walker syndrome (MWS) is characterized by multiple joint contractures, a mask-like face with blepharophimosis, micrognathia, high-arched or cleft palate, low-set ears, decreased muscular bulk, arachnodactyly, and kyphoscoliosis. We report a case of MWS along with unusual manifestation of neurological, cardiovascular, and genitourinary system. PMID:23162309

  14. [An unusual suicidal attempt (author's transl)].

    PubMed

    Langer, R

    1979-10-30

    Report on an unusual suicidal attempt by a separating disc (grinding disc). The patient inflicted himself incisions on both wrists, the occiput and the throat between the hyoid-bone and the thyroid cartilage. The hypopharynx was severed up to the posterior wall and the left jugular vein was cut completely. Due to the immediate care by the physician, the patient survived. PMID:524898

  15. [Clinical dilemma: an unusual case of ascites].

    PubMed

    Romi, Hila; Hausman, Michael; Kachko, Leonid; Emanuel, Sikuler

    2012-12-01

    Cirrhotic portal hypertension is the major cause of ascites. Ascites is the most common expression of decompensated liver disease. However, other etiologies may occur and may pose a diagnostic and therapeutic challenge. A patient with chronic hepatitis C and an unusual cause of ascites is presented. PMID:23330254

  16. Diseases of unusual occupations: an historical perspective.

    PubMed

    Cherniack, M G

    1992-01-01

    A compilation of conditions deemed unusual from previous eras serves to highlight now obsolete jobs and remind that even relatively prevalent occupational disorders of today will be viewed retrospectively as strange in the proximate future. Discussed are coal miners' nystagmus, scrotal cancer in chimney sweeps, phossy jaw, hatters' shakes, painters' colic, potters' rot, chauffeurs' knee, glanders, caisson disease, and others. PMID:1496425

  17. An unusual oviraptorosaurian dinosaur from China

    Microsoft Academic Search

    Xing Xu; Yen-Nien Cheng; Xiao-Lin Wang; Chun-Hsiang Chang

    2002-01-01

    Oviraptorosaurians are an unusual group of theropod dinosaurs, with highly specialized skulls. Here we report a new oviraptorosaurian, Incisivosaurus gauthieri, gen. et sp. nov., from the lowest part of the Lower Cretaceous Yixian Formation of China. This oviraptorosaurian displays a number of characters closer to more typical theropods, such as a low skull and toothed jaws, thus greatly reducing the

  18. CORRESPONDENCE Unusual Features of Thyroid Carcinomas in

    E-print Network

    Monnat, Ray

    CORRESPONDENCE Unusual Features of Thyroid Carcinomas in Japanese Patients with Werner Syndrome genetic instability, and an elevated risk of se- lected neoplasms including thyroid carcinoma.1) in Japanese WS patients may confer a higher risk of thyroid carcinoma, and that N­ and C-terminal WRN

  19. Clinical application of CT and CT-guided percutaneous transthoracic needle biopsy in patients with indeterminate pulmonary nodules*

    PubMed Central

    Cardoso, Luciana Vargas; Souza, Arthur Soares

    2014-01-01

    OBJECTIVE: To investigate the clinical application of CT and CT-guided percutaneous transthoracic needle biopsy (CT-PTNB) in patients with indeterminate pulmonary nodules (IPNs). METHODS: We retrospectively studied 113 patients with PNs undergoing CT and CT-PTNB. Variables such as gender, age at diagnosis, smoking status, CT findings, and CT-PTNB techniques were analyzed. Data analysis was performed with the Student's t-test for independent samples the chi-square test, and normal approximation test for comparison of two proportions. RESULTS: Of the 113 patients studied, 68 (60.2%) were male and 78 (69%) were smokers. The diameter of malignant lesions ranged from 2.6 cm to 10.0 cm. Most of the IPNs (85%) were located in the peripheral region. The biopsied IPNs were found to be malignant in 88 patients (77.8%) and benign in 25 (22.2%). Adenocarcinoma was the most common malignant tumor, affecting older patients. The IPN diameter was significantly greater in patients with malignant PNs than in those with benign IPNs (p < 0.001). Having regular contour correlated significantly with an IPN being benign (p = 0.022), whereas spiculated IPNs and bosselated IPNs were more often malignant (in 50.7% and 28.7%, respectively). Homogeneous attenuation and necrosis were more common in patients with malignant lesions (51.9% and 26.9%, respectively) CONCLUSIONS: In our sample, CT and CT-PTNB were useful in distinguishing between malignant and benign IPNs. Advanced age and smoking were significantly associated with malignancy. Certain CT findings related to IPNs (larger diameter, spiculated borders, homogeneous attenuation, and necrosis) were associated with malignancy. PMID:25210960

  20. [Unusual presentation of rib malformation].

    PubMed

    Cosson, M-A; Breton, S; Aprahamian, A; Grevent, D; Cheron, G

    2012-11-01

    Rib malformation and anatomical variations are not well known and are still often underdiagnosed. Usually, rib malformations are fortuitously discovered. We describe here the case of a girl, 4 years and 4 months old, who presented at the emergency unit for fever and an anterior tumefaction of the ribcage, without any other symptoms. She was eupneic with a normal pulmonary auscultation and viral tonsillitis with a negative streptococcus test. The thoracic tumefaction was parasternal, painless, and fixed and measured approximately 2.5 × 2cm. Ultrasound findings consisted of a duplicated and hypoechogenic hypertrophy of the sterno-costal cartilage of the 4th left rib. Magnetic resonance imaging (MRI) confirmed the diagnosis of chondral bifidity of the sterno-costal junction of the 4th left rib. Fever, due to the viral tonsillitis, disappeared after 4 days. Rib malformations are rare, often anterior, unilateral, and preferentially located on the 3rd or the 4th rib. The main malformative rib lesions are bifid ribs, rib spurs, and widened ribs. Very rarely, they can be associated with Gorlin-Goltz syndrome or with other malformations such as VATER complex. The main differential diagnoses of these rib malformations are traumatic, tumoral, and infectious etiologies. In case of tumoral diseases, the topography of the lesion focuses the etiologic diagnosis: whereas an anterior and cartilaginous lesion is always benign, a lateral or posterior lesion can be an Ewing sarcoma. Rib malformation investigation consists in meticulous questioning, a complete clinical examination looking for any associated anomaly, completed by basic imaging explorations such as plain thoracic radiography focused on the ribcage and ultrasound. Finally, complementary computerized tomography or preferably MRI, depending on the anatomic location of the lesion, confirms the final diagnosis, as presented in our case report, and removes any uncertainty. PMID:23037576

  1. Prospectively gated cardiac CT

    Microsoft Academic Search

    Dominic Heuscher; S. Zabic

    2007-01-01

    Future cardiac CT protocols will utilize large area detectors with whole heart scans performed within one heartbeat. For such scans, accurate prospective ECG gating is essential to capture the heart at the correct phase. This report addresses one of the main factors affecting the prospective gating accuracy: the ability to predict the cardiac phase from the ECG signal. Two different

  2. Dedicated breast CT

    NASA Astrophysics Data System (ADS)

    Boone, John

    2009-03-01

    Dedicated breast computed tomography (CT) systems were designed and fabricated in our laboratory, and patient scanning commenced in November 2004. The breast CT scanner was designed utilizing several off-the-shelf components, including the x-ray system, the flat-panel detector, and a position encoder - bearing - motor system. These components were integrated into a custom designed scanner frame and gantry. The breast CT scanners utilize a 17 second acquisition during patient breath-hold, and during this time 500 projection images are acquired over 360 degrees around the breast. The radiation levels are adjusted such that the mean glandular dose is equal to that of two-view mammography for each woman. As of November 2008, over 180 patients have been scanned. Of these, about 40 were imaged with and without contrast agent injection. We have also imaged 4 patients using an integrated PET system. Initial evaluation indicates that high-quality tomographic images of the breast can be achieved at dose levels comparable to two view mammography. The ultimate utility of breast CT may include breast cancer screening, diagnostic imaging, robotically controlled biopsy, and other interventional procedures.

  3. Cholesterol granuloma of the petrous apex: CT diagnosis

    SciTech Connect

    Lo, W.W.M.; Solti-Bohman, L.G.; Brackmann, D.E.; Gruskin, P.

    1984-12-01

    Cholesterol granuloma of the petrous apex is a readily recognizable and treatable entity that is more common than previously realized. Cholesterol granuloma grows slowly in the petrous apex as a mass lesion until it produces hearing loss, tinnitus, vertigo, and facial twitching. Twelve cases of cholesterol granuloma of the petrous apex are illustrated; ten of these analyzed in detail, especially with respect to CT findings. A sharply and smoothly marginated expansile lesion in the petrous apex, isodense with plain and nonenhancing on CT, is in all probability a cholesterol granuloma. Preoperative recognition by CT is important for planning proper treatment.

  4. Cochlear otosclerosis (otospongiosis): CT analysis with audiometric correlation

    SciTech Connect

    Swartz, J.D.; Mandell, D.W.; Berman, S.E.; Wolfson, R.J.; Marlowe, F.I.; Popky, G.L.

    1985-04-01

    Ninety patients who had suspected or confirmed fenestral or cochlear otosclerosis underwent CT examination. Foci of demineralization in the otic capsule were discovered in 20 ears (12 patients). Audiometric studies of the 12 patients revealed sensorineural hearing loss (SNHL) with distinct correlation of CT findings with progressivity and with involvement of the frequency level subtended by the specific area of the cochlea involved. Foci of abnormal increased density, presumably representing the healed phase of this disorder, were found less frequently than expected. There was a predilection for the basilar turn. All patients had static SNHL in the higher frequencies. The healed phase of this disorder is probably not consistently diagnosable with CT.

  5. Less common CT features of medulloblastoma

    SciTech Connect

    Zee, C.S (Univ. of Southern California School of Medicine, Los Angeles); Segall, H.D.; Miller, C.; Ahmad, J.; McComb, J.G.; Han, J.S.; Park, S.H.

    1982-07-01

    While many medulloblastomas have characteristic features on computed tomography (CT), a significant number have atypical features, including a cystic or necrotic component, calcification, hemorrhage, lack of contrast enhancement, and eccentric location, and/or direct supratentorial extension. Of 30 consecutive untreated cases reviewed by the authors, 14 (47%) had such findings. Failure to make the proper diagnosis will result in some cases if these features are not recognized as possible signs of medulloblastoma.

  6. Rectus sheath hematoma: diagnostic classification by CT

    Microsoft Academic Search

    J. D. Berná; V. Garcia-Medina; J. Guirao; J. Garcia-Medina

    1996-01-01

    .   A method of classification for hematomas of the rectus abdominis sheath (RSH) is proposed based on findings observed in CT\\u000a in the 13 cases of RSH in the present study. Type I hematomas (five cases) are slight and do not require hospitalization.\\u000a Type II (three cases) and type III (five cases) are moderate and severe hematomas, respectively, and do

  7. Small bowel obstruction due to phytobezoar: CT diagnosis.

    PubMed

    Ko, S; Lee, T; Ng, S

    1997-01-01

    We report two cases of small bowel obstruction (SBO) due to phytobezoar impaction. In both cases, computed tomography (CT) demonstrated a well-defined, ovoid intraluminal mass with mottled gas pattern within the dilated small bowel at the site of obstruction and an abruptly collapsed lumen beyond the lesion. Recognition of these CT findings allows specific preoperative diagnosis of SBO owing to this uncommon lesion. PMID:9233879

  8. Spleen in Hodgkin disease: diagnostic value of CT

    SciTech Connect

    Strijk, S.P.; Wagener, D.J.T.; Bogman, M.J.J.T.; de Pauw, B.E.; Wobbes, T.

    1985-03-01

    Findings of CT of the spleen were compared with those of histologic examination in 35 patients who had Hodgkin disease. CT provides a simple way to calculate splenic size. This index is also of value in the assessment of the histologic state of the spleen. An accuracy rate of 91%, specificity of 94%, and a sensitivity of 89% in diagnosing splenic localization of lymphoma was found in this study.

  9. Second century megadrought in the Rio Grande headwaters, Colorado: How unusual was medieval drought?

    NASA Astrophysics Data System (ADS)

    Routson, Cody C.; Woodhouse, Connie A.; Overpeck, Jonathan T.

    2011-11-01

    A new tree-ring record from living and remnant bristlecone pine (Pinus aristata) wood from the headwaters region of the Rio Grande River, Colorado is used in conjunction with other regional records to evaluate periods of unusually severe drought over the past two millennia (B.C. 268 to A.D. 2009). Our new record contains a multi-century period of unusual dryness between 1 and 400 A.D., including an extreme drought during the 2nd century. Characterized by almost five decades of drought (below average ring width), we hypothesize this megadrought is equally, if not more severe than medieval period megadroughts in this region. Published paleoclimate time series help define the spatial extent, severity, and potential causes of the 2nd century megadrought. Furthermore, this early period of unusual dryness has intriguing similarities to later medieval period aridity. Our findings suggest we should anticipate similar severe drought conditions in an even warmer and drier future.

  10. Thorotrast-induced hepatosplenic neoplasia: CT identification.

    PubMed

    Levy, D W; Rindsberg, S; Friedman, A C; Fishman, E K; Ros, P R; Radecki, P D; Siegelman, S S; Goodman, Z D; Pyatt, R S; Grumbach, K

    1986-05-01

    Despite discontinuation of its use in the 1950s, the consequences of Thorotrast usage continue to be recognized. In a review of plain film and CT findings of 20 cases of Thorotrast exposure, 15 of 17 patients demonstrated Thorotrast accumulation in the liver and spleen on plain films. Typically, this appeared as regions of trabeculated increased density within the liver. The spleen was of normal or decreased size and often demonstrated a finely punctate pattern of opacification. Only two malignancies could be suggested on plain film alone: one hepatic and one splenic. Five patients with hepatic malignancies underwent CT examinations: three with cholangiocarcinoma, one with angiosarcoma, and one with hepatocellular carcinoma. No specific criteria could be established to distinguish among these lesions, as each neoplasm appeared as relatively low-density mass(es). Two cases of splenic angiosarcoma appeared as low-density filling defect(s) in the otherwise opaque spleen, one case primary and the other metastatic from the liver. CT was superior to plain radiography in detecting and characterizing Thorotrast distribution and any superimposed malignancy. In addition to periodic liver function tests, screening CT of patients exposed to Thorotrast might detect hepatic neoplasms at an operable stage. PMID:3008544

  11. Pitfalls in PET/CT imaging

    NASA Astrophysics Data System (ADS)

    Rondogianni, Ph; Papathanasiou, N.; Giannopoulou, Ch

    2011-09-01

    PET with 2-[fluorine 18] fluoro-2-deoxy-d-glucose (FDG), has been a clinical tool for the evaluation of various cancers providing valuable metabolic information clinically helpful in the diagnosis, initial staging, therapy monitoring and restaging. However, FDG is not specific for neoplastic processes. Unless anatomic correlation is available to delineate normal structures, pathologic sites of FDG accumulation can easily be confused with normal physiological uptake, leading to false-positive or false-negative findings. Coregistration of PET scans (functional and morphologic information) with computed tomographic (CT) scans (anatomic information) using a combined PET-CT scanner improves the overall sensitivity and specificity of information provided by PET or CT alone. In this paper, we discuss the probable causes of false negative images and pitfalls due to technical reasons, inflammatory processes or benign lesions as well as the utility of PET-CT in differentiating malignant from inflammatory and benign processes, since in some cases such differentiation cannot be made, with certainty, using FDG PET alone.

  12. Comparison of computed tomographic and cytopathological findings in the evaluation of adult orbital mass.

    PubMed

    Islam, M N; Amin, M S; Dipi, R M; Khan, N A

    2013-01-01

    An observational study was conducted to demonstrate the role of Computed Tomographic (CT) scan to detect clinically suspected adult orbital mass in 47 patients which could not be differentiated clinically. The CT findings were compared and correlated with the findings of fine needle aspiration cytology (FNAC) or histopathology. CT diagnosis of optic nerve sheath meningioma were 12 cases, among them only nine cases confirmed cytopathologically as meningioma and rest three as lymphoma. Among ten cases of hemangioma, eight cases were confirmed cytopathologically as cavernous hemangioma and rest two were pseudotumor and chronic inflammatory lesion. Seven cases diagnosed as pseudotumor in CT were confirmed cytopathologically. Seven cases diagnosed as paranasal sinus masses with orbital extension (nasopharyngeal angiofibroma) in CT were confirmed cytopathologically. Among three cases of thyroid ophthalmopathy diagnosed in CT, only two cases confirmed cytopathologically and rest one cytopathologic diagnosis was not possible due to inadequate tissue supply during FNAC. Two cases of chronic inflammatory lesion diagnosed in CT, also confirmed cytopathologically. Two cases of metastatic lesion diagnosed in CT, also confirmed cytopathologically. Two cases of lacrimal gland tumor diagnosed in CT, also confirmed cytopathologically i.e., pleomorphic adenoma. Two cases of melanoma diagnosed in CT, only one confirmed cytopathologically and rest one cytopathologic diagnosis was not possible due to frank blood came out during FNAC. Pseudotumors were subsequently diagnosed the non-diagnostic cases on the basis of clinical and radiological findings. It is evident from these findings that CT is a useful modality in the diagnosis of adult orbital masses. PMID:23416813

  13. Renal medullary ''rings'': possible CT manifestation of hypercalcemia

    SciTech Connect

    Curry, N.S.; Gordon, L.; Gobien, R.P.; Lott, M.

    1984-01-01

    Bilateral dense rings in the renal medulla were found on noncontrasted computed tomography in a patient with marked hypercalcemia and suspected primary hyperparathyroidism. The rings were not present on plain radiographs and were obscured on contrasted scans, and may represent occult nephrocalcinosis. Associated findings--renal insufficiency induced by hypercalcemia and interstitial nephritis--may be reversible with early recognition of this CT finding.

  14. 111In-pentetreotide uptake in an ovarian teratoma and impact of SPECT/CT imaging.

    PubMed

    Sainz-Esteban, Aurora; González, Maria Luisa; Vara-Castrodeza, Alejandro; García-Talavera, Paloma; Olmos, Roberto; Ángeles Ruiz, Maria; Gamazo, Claudia; Gómez, Antonio

    2013-10-01

    We present a 19-year-old woman with a neuroendocrine tumor of the appendix diagnosed during an acute appendicitis. An 111In-pentetreotide scan was performed to establish the extension of the disease. Scintigraphy showed an abnormal focal uptake in the right side of the pelvis. The SPECT/CT images demonstrated a round-shaped mass in the right ovary. Pathology revealed a benign cystic mature teratoma. In our case, hybrid imaging combining SPECT and CT contributed to localize the unusual 111In-pentetreotide accumulation within the anatomical context. PMID:23989444

  15. Unusually large sialolith of Wharton's duct

    PubMed Central

    Iqbal, Ali; Gupta, Anup K.; Natu, Subodh S.; Gupta, Atul K.

    2012-01-01

    The formation of calcific concretions in the salivary duct or glands is a common disorder, especially in the submandibular glands. Most of the salivary calculi are small in size, in contrast to those that reach several centimeters, which are reported as megaliths or giant calculi in the literature. They may occur in any of the salivary gland ducts but are most common in Wharton's duct and the submandibular gland. This report presents clinical and radiographical sign of an unusually large sialolith. There was painless swelling on the floor of the edentulous mouth and patient was unaware of it. Radiographical examination revealed large irregular radio-opaque mass superimposed on right canine and premolar areas. This case report describes a patient presenting with an unusually large submandibular gland duct sialolith, the subsequent patient management, the aetiology, diagnosis and its treatment. PMID:23483770

  16. [Rare or unusual forms of psoriasis].

    PubMed

    Cribier, B

    2012-04-01

    Apart from plaque-type psoriasis, there are multiple particular or rare clinical presentations, according to signs and symptoms, localization or distribution of lesions. Psoriasis can affect mucous membranes, especially the genital areas of male and female patients, causing pain or burning sensation and decreased quality of life. Geographic tongue is not specific of psoriasis, but is more frequent in this context. Other localizations like the lips and the eylids are rare, but should not be overlooked. Certain lesions have an unusual distribution, like psoriasis gyrata and blaschko linear forms. Pustules are frequently observed on the palms and soles. Acrodermatitis continua is a rare chronic pustular condition affecting the acral areas, mainly the fingers, which is associated with severe nail involvement. Nails can also be involved in the unusual pachydermo-periostitis, a clinical form of psoriasis without epidermal lesions, which has characteristic radiologic presentation. PMID:22541727

  17. Unusual causes of papilledema: Two illustrative cases

    PubMed Central

    Nguyen, Ha Son; Haider, Kathryn M.; Ackerman, Laurie L.

    2013-01-01

    Background: Neurosurgeons are frequently among the first physicians asked to evaluate patients with papilledema, and the patient is often referred with the implication that they may require shunting. After an initial evaluation to exclude potential neurosurgical emergencies, the physician should carefully consider various etiologies of papilledema to prevent unnecessary neurosurgical operations. Case Description: The authors report two illustrative cases of unusual causes of papilledema: Anemia and leukemic infiltration of the central nervous system. In each case, a complete blood count provided clues for the diagnosis. A review of the literature is also included. Conclusions: Both patients responded to medical management/treatment of the underlying disease and did not require neurosurgical operative intervention. Papilledema may be caused by other etiologies besides increased intracranial pressure. The authors present two unusual cases leading to papilledema and provide an outline for the workup of these conditions. PMID:23646270

  18. Allantoic cyst – an unusual umbilical cord swelling

    PubMed Central

    Gupta, N; Corbett, H; Ismail, R; Sathanantharajah, R; Sivakumar, S; McCarthy, Liam

    2011-01-01

    We report a baby with an unusual umbilical cord swelling. On the antenatal scans, a cystic area within the umbilical cord near its insertion onto the abdominal wall was detected. Postnatally an unusually thick umbilical cord with a yellow fluid filled cyst at the base was noted. The fluid from the cyst was confirmed as urine and ultrasound confirmed patent urachus. The baby underwent a cystoscopy and excision of patent urachus with associated allantoic cyst. Allantoic cyst is a rare swelling formed at the base of umbilicus associated with a patent urachus which results from an allantoic remnant. Paediatricians need to be aware about this condition as investigation is required to differentiate allantois cysts from umbilical pseudocysts. A patent urachus with allantoic cyst requires surgical excision. PMID:24950576

  19. CT Teaching Files

    NSDL National Science Digital Library

    Fishman, Elliot K.

    CTisus is a project of the Advanced Medical Imaging Laboratory, and on this site they present their teaching files. The files are divided by organ or body systems (such as Stomach and Neuro), and each division contains from one to forty-two individual files. Each file contains 100 cases, which allow students to see CT scans, courtesy of Dr. Elliot K. Fishman, and diagnose the illness based on what the scan reveals. By clicking the â??Diagnosisâ?ť on/off buttons, they can see the correct diagnosis. This site will be helpful for students in the fields of diagnostic radiographic imaging or radiology to have an understanding of what diseases look like in CT scans, and for teachers who instruct those students to supplement their classroom lectures and activities with these ready-to-use teaching files.

  20. Use of subsequent PET/CT in diffuse large B-cell lymphoma patients in complete remission following primary therapy

    PubMed Central

    Zhang, Xu; Fan, Wei; Xia, Zhong-Jun; Hu, Ying-Ying; Lin, Xiao-Ping; Zhang, Ya-Rui; Li, Zhi-Ming; Liang, Pei-Yan; Li, Yuan-Hua

    2015-01-01

    Interim 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (I-PET/CT) is a powerful tool for monitoring the response to therapy in diffuse large B-cell lymphoma (DLBCL). This retrospective study aimed to determine when and how to use I-PET/CT in DLBCL. A total of 197 patients treated with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) were enrolled between October 2005 and July 2011; PET/CT was performed at the time of diagnosis (PET/CT0), after 2 and 4 cycles of chemotherapy (PET/CT2 and PET/CT4, respectively), and at the end of treatment (F-PET/CT). According to the International Harmonization Project for Response Criteria in Lymphoma, 110 patients had negative PET/CT2 scans, and 87 had positive PET/CT2 scans. The PET/CT2-negative patients had significantly higher 3-year progression-free survival rate (75.8% vs. 38.2%) and 3-year overall survival rate (93.5% vs. 55.6%) than PET/CT2-positive patients. All PET/CT2-negative patients remained negative at PET/CT4, but 3 were positive at F-PET/CT. Among the 87 PET/CT2-positive patients, 57 remained positive at F-PET/CT, and 32 progressed during chemotherapy (15 at PET/CT4 and 17 at F-PET/CT). Comparing PET/CT4 with PET/CT0, 7 patients exhibited progression, and 8 achieved partial remission. Comparing F-PET/CT with PET/CT0, 10 patients exhibited progression, and 7 achieved partial remission. In conclusion, our results indicate that I-PET/CT should be performed after 2 rather than 4 cycles of immunochemotherapy in DLBCL patients. There is a limited role for subsequent PET/CT in the detection of relapse in PET/CT2-negative patients, but repeat PET/CT is required if the PET/CT2 findings are positive. PMID:25418196

  1. Triple Teeth: Report of an Unusual Case

    PubMed Central

    Babaji, Prashant; Prasanth, M. A.; Gowda, Ajith R.; Ajith, Soumya; D'Souza, Henston; Ashok, K. P.

    2012-01-01

    Fusion or synodontia is a union of two or more than two developing teeth. Commonly fusion occurs between teeth of the same dentition, mixed dentition, or between normal and supernumerary teeth. Fused primary teeth present with several clinical problems like caries, periodontal problem, arch asymmetry, delayed eruption, ectopic eruption of succedaneous teeth, aesthetic, and other complications. This paper presents a rare and unusual case of triple teeth in mandibular primary dentition. PMID:23346424

  2. An unusual case of radial club hand.

    PubMed

    Waldram, M A

    1990-05-01

    An unusual form of congenital hand deformity is described. It consists of radial club hand deformity with the whole of the radius present but dislocated at proximal and distal ends. This best fits "failure of development" group in the conventional classification. The future management will depend on whether the forearm grows at the same rate on the pre-axial and post-axial sides. PMID:2164074

  3. Segmental lichen planus pigmentosus: An unusual presentation

    PubMed Central

    Kumar, Y Hari Kishan; Babu, Anagha Ramesh

    2014-01-01

    Lichen planus pigmentosus (LPP) is a distinct clinical entity commonly encountered in the Indian population. It is considered a variant of lichen planus (LP). A 40-year-old male presented with asymptomatic hyperpigmented macules in a segmental distribution since 10 years that were clinically and histopathologically suggestive of LPP. We propose the terminology “segmental lichen planus pigmentosus” and report this unusual presentation. PMID:24860750

  4. Unusual Case of ALL with Ovarian Relapse.

    PubMed

    Sasidharan, P K; Sugeeth, M; Abdul Majeed, P; Shaan, Mohamed; Hitha, B

    2015-03-01

    Patients with acute lymphoblastic leukemia (ALL) can develop relapse in sanctuary sites like brain, ovary or testis even when the bone marrow is in remission. Pelvic recurrence is rarely reported during the follow up of successfully treated ALL in females. We report here a very unusual case of a large pelvic lump which the patient herself could feel, that was probably an ovarian relapse of ALL, successfully treated with re-induction chemotherapy alone and achieved complete remission. PMID:25548463

  5. [Photon counting CT].

    PubMed

    Ogawa, Koichi

    2013-01-01

    Photon counting CT is a new technology that enables us to improve the quality of images by a conventional CT, in which the detection of transmitted photons is conducted by an integration of photon energies. This paper describes the features and advantages of the photon counting detection compared to the energy integration detection. They are (1) reduction of electrical noise and improvement of the signal-to-noise ratio, (2) improvement of the image contrast using the weighting factors to images acquired with energy bins, (3) k-edge imaging by setting two energy bins at the k-edge of some contrast media such as gadopenteto megruminacid and gold-nanoparticles, and (4) material decomposition using the data acquired with multiple energy windows. For the material decomposition, the principal component analysis, singular value decomposition method, and the application of the artificial neural network are described. The photon counting CT technique has a potential to improve the diagnostic accuracy and introduce new clinical methods, however, much efforts are required to use this technology in the clinical situation. PMID:24893447

  6. Unusual Cases of Multiple Symmetrical Lipomatosis with Neurological Disorders

    PubMed Central

    Triantafyllou, Nikolaos I.; Zalonis, Ioannis; Kararizos, Grigoris; Gkiatas, Konstantinos; Christidi, Fotini; Kararizou, Evangelia

    2009-01-01

    Multiple symmetrical lipomatosis (MSL) is a rare disorder of unknown etiology defined as the presence of multiple and symmetrical fatty accumulations, usually involving the upper trunk, neck and head. Frequently associated findings include diabetes mellitus, hyperlipidemia, liver disease, hypothyroidism and polyneuropathy of unknown origin, but nevertheless, there are published reports of cognitive disorders in patients with MSL. We describe two unusual cases (38-year-old and 45-year-old Greek men) of MSL who presented with polyneuropathy and memory disorders. This is the first description of memory disorders in patients with MSL. We propose that Mini-Mental State Examination and assessment of cognitive functions should be performed for all patients with MSL. The underlying mechanism in our patients remains unknown, and this question should be the subject of a future study. PMID:20048140

  7. Necrobiosis lipoidica with elastophagocytosis on an unusual location.

    PubMed

    Tee, Shang-Ian; Chen, Qi Ping; Lim, Yen Loo

    2014-09-01

    Necrobiosis lipoidica (NL) is a granulomatous disease of collagen degeneration classically affecting the lower extremities. Elastophagocytosis is a histological finding, whereby multinucleate macrophages demonstrate phagocytosis of elastic fibers commonly associated with sun-damaged skin. Elastophagocytosis is not typically described in NL. The authors present a patient who presented with reddish-yellow plaques on both his forearms. Skin biopsy revealed extensive palisaded granulomas consistent with NL and features of elastophagocytosis in the upper dermis. The unusual site of presentation is a diagnostic pitfall, further complicated by the histological features of elastophagocytosis, for which the differential diagnosis of actinic granuloma needs to be considered. This case highlights the importance of clinicopathological correlation to arrive at a definitive diagnosis in situations where unexpected features on physical examination and histology may confound the clinical picture. PMID:24786578

  8. Epidemiological enquiries into a school outbreak of an unusual illness.

    PubMed

    Goh, K T

    1987-06-01

    A total of 65 students and one female teacher were afflicted with an unusual illness following alleged inhalation of a 'gas' in the school. The main symptoms were dizziness, chills, nausea, headache, difficulty in breathing and faintness. Initial investigations revealed elevated carboxyhaemoglobin levels (greater than 5%) of 16 hospitalized students. However, no sources of carbon monoxide emission could be detected despite extensive environmental investigations. The outbreak was characterized by the following features: most victims were adolescent girls; there was a high proportion of recurrences; the illness was self-limiting with inconsistent clinical and epidemiological findings; its mode of transmission was associated with antecedent visual observation or verbal information, and it died down immediately after confidence had been restored. A diagnosis of mass psychogenic illness was made. The high-risk students were Malay girls who were from the normal class (for slow learners), engaged in part-time employment and easily influenced by what they had heard or seen. PMID:3610454

  9. Unusual presentation of seminal vesiculitis in an infertile man.

    PubMed

    Andrade-Rocha, Fernando Tadeu

    2007-12-01

    Seminal vesiculitis is generally not investigated in infertile men, since it is uncommon and often nonspecific in signs and symptoms. In this article, the author reports an unusual presentation of seminal vesiculitis, incidentally diagnosed in a man referred for semen analysis to investigate infertility. Analyses of physical properties of the ejaculate (coagulation, liquefaction, volume, viscosity and pH) and of biochemical markers of the prostate (total calcium and zinc) and seminal vesicle (fructose and inorganic phosphorus) detected a dysfunction of the seminal vesicles that was subsequently diagnosed as vesiculitis using transrectal ultrasound. After treatment with a single 500-mg dose of oral ciprofloxacin, the patient was referred again for semen analysis. The analysis showed considerable improvement of the seminal vesicle function. The clinical significance of these findings is discussed. PMID:18163927

  10. Renal malignant solitary fibrous tumor with single lymph node involvement: report of unusual metastasis and review of the literature

    PubMed Central

    Mearini, Ettore; Cochetti, Giovanni; Barillaro, Francesco; Fatigoni, Sonia; Roila, Fausto

    2014-01-01

    Solitary fibrous tumors are rare mesenchymal spindle cell neoplasms that are usually found in the pleura. The kidneys are an uncommon site and only few cases of renal solitary fibrous tumor exhibit malignant behavior metastasizing to the liver, lung, and bone through the hematogenous pathway. Purpose To describe the first case of lymph node metastasis from renal solitary fibrous tumor in order to increase the knowledge about the malignant behavior of these tumors. Patients and methods A 19-year-old female patient had intermittent hematuria for several months without flank pain or other symptoms. A chest and abdomen CT scan was performed and showed a multi-lobed bulky solid mass of 170 × 98 × 120 mm in the left kidney. One day before the surgery, the left renal artery was catheterized and the kidney embolization was performed using a Haemostatic Absorbable Gelatin Sponge and polyvinyl alcohol. We then performed a radical nephrectomy with hilar, para-aortic, and inter-aortocaval lymphadenectomy. Results Estimated intraoperative blood loss was 200 mL and the operative time was 100 minutes. No postoperative complications occurred. The hospital stay was 7 days long. The histological examination was malignant solitary fibrous tumor of the kidney. Cancerous tissue showed cellular atypia, with an increased mitotic index (up to 7 × 10 hpf). Immunohistochemical analysis showed positive results for CD34, BCL2, partial expression of HBME1, and occasionally of synaptophysin. Histological evaluation confirmed the presence of metastasis in one hilar node. The patient did not receive any other therapy. At 30-month follow-up, the patient was in good health and no local recurrence or metastases had occurred. Conclusion This is the first case of lymph node metastasis from a renal solitary fibrous tumor showing unusual malignant behavior; this finding adds new information about the biology and progression of these tumors, which remain unclear. PMID:24855378

  11. Chest CT Features of North American Paragonimiasis

    PubMed Central

    Henry, Travis S.; Lane, Michael A.; Weil, Gary J.; Bailey, Thomas C.; Bhalla, Sanjeev

    2013-01-01

    OBJECTIVE The purpose of this study was to characterize the chest CT findings of North American paragonimiasis due to Paragonimus kellicotti in the largest (to our knowledge) case series reported to date and to compare the findings with those reported for paragonimiasis infections in other regions. MATERIALS AND METHODS A retrospective review was performed of chest CT examinations of eight patients with North American paragonimiasis treated at our institution between 2006 and 2010. Findings were characterized by site of involvement, including lungs and pleura, heart and pericardium, lymph nodes, and upper abdomen. RESULTS The most common chest CT findings in this case series were pleural effusions and internal mammary and cardiophrenic lymphadenopathy. Pulmonary parenchymal findings included peripheral lung nodules of 1–3.5 cm in size with surrounding ground-glass opacity; many nodules had a linear track to the pleural surface that may correspond to the worm’s burrow tunnel. Pericardial involvement (5/8 patients) and omental inflammation (5/7 patients), which are uncommon in Asian paragonimiasis, were common in this series. CONCLUSION Pleural and pulmonary features of North American paragonimiasis are generally similar to those reported from Asia. The presence of a track between a pulmonary nodule and the pleura may help distinguish paragonimiasis from mimickers, including chronic eosinophilic pneumonia, tuberculosis, fungal infection, or malignancy. Pericarditis, lymphadenopathy, and omental inflammation were more common in our series than in reports on paragonimiasis from other regions. These differences may be related to the infecting parasite species or to the fact that radiologic examinations in the present series were performed relatively early in the course of infection. PMID:22528896

  12. Potential pitfall of FDG PET/CT in assessing residual masses postchemotherapy.

    PubMed

    Lu, Suat-Jin; Wong, Alvin Seng Cheong; Seet, Ju-Ee; Hao, Cheng; Sinha, Arvind

    2013-04-01

    A 22-year-old man with primary mediastinal choriocarcinoma and bilateral lung metastases underwent an FDG PET/CT scan after completing chemotherapy. Serum beta-human chorionic gonadotropin had normalized. PET/CT showed increased FDG uptake in the anterior mediastinal and lung lesions, suspicious for residual disease. After resection of the mediastinal and lung lesions, histopathology revealed necrosis and fibrohistiocytic reaction with no viable tumor. There was discordance between beta-human chorionic gonadotropin (negative) and FDG PET/CT (positive) findings, with PET/CT findings being false positive. Awareness of this potential pitfall of FDG PET/CT is important, and caution should be exercised when using FDG PET/CT to assess residual masses after chemotherapy. PMID:23455529

  13. Neuroimaging findings in macrocephaly-capillary malformation: a longitudinal study of 17 patients.

    PubMed

    Conway, Robert L; Pressman, Barry D; Dobyns, William B; Danielpour, Moise; Lee, John; Sanchez-Lara, Pedro A; Butler, Merlin G; Zackai, Elaine; Campbell, Lindsey; Saitta, Sulagna C; Clericuzio, Carol L; Milunsky, Jeff M; Hoyme, H Eugene; Shieh, Joseph; Moeschler, John B; Crandall, Barbara; Lauzon, Julie L; Viskochil, David H; Harding, Brian; Graham, John M

    2007-12-15

    Here, we report the neuroimaging findings and neurological changes in 17 unpublished patients with Macrocephaly-Capillary Malformation (M-CM). This syndrome has been traditionally known as Macrocephaly-Cutis Marmorata Telangiectatica Congenita (M-CMTC), but we explain why M-CM is a more accurate term for this overgrowth syndrome. We analyzed the 17 patients with available brain MRI or CT scans and compared their findings with features identified by a comprehensive review of published cases. White matter irregularities with increased signal on T2-weighted images were commonly observed findings. A distinctive feature in more than half the patients was cerebellar tonsillar herniation associated with rapid brain growth and progressive crowding of the posterior fossa during infancy. In four such cases, we confirmed that the tonsillar herniation was an acquired event. Concurrently, with the development of these findings, ventriculomegaly (frequently obstructive) and dilated dural venous sinuses were observed in conjunction with prominent Virchow-Robin spaces in many of those in whom cerebellar tonsil herniation had developed. We postulate that this constellation of unusual features suggests a dynamic process of mechanical compromise in the posterior fossa, perhaps initiated by a rapidly growing cerebellum, which leads to congestion of the venous drainage with subsequently compromised cerebrospinal fluid reabsorption, all of which increases the posterior fossa pressure and leads to acquired tonsillar herniation. We make a distinction between congenital Chiari I malformation and acquired cerebellar tonsil herniation in this syndrome. We also observed numerous examples of abnormal cortical morphogenesis, including focal cortical dysplasia, polymicrogyria which primarily involved the perisylvian and insular regions, and cerebral and/or cerebellar asymmetric overgrowth. Other findings included a high frequency of cavum septum pellucidum or vergae, thickened corpus callosum, prominent optic nerve sheaths and a single case of venous sinus thrombosis. One patient was found to have a frontal perifalcine mass resembling a meningioma at age 5 years. This is the second apparent occurrence of this specific tumor in M-CM. PMID:18000912

  14. Obscure pulmonary masses: bronchial impaction revealed by CT

    SciTech Connect

    Pugatch, R.D.; Gale, M.E.

    1983-11-01

    Dilated bronchi impacted with mucus or tumor are recognized on standard chest radiographs because they are surrounded by aerated pulmonary parenchyma. When imaged in different projections, these lesions produce a variety of appearances that are generally familiar. This report characterizes less familiar computed tomographic (CT) findings in eight patients with pathologic bronchial distension of congenital, neoplastic, or infectious etiologies and correlates them with chest films. In seven patients, CT readily revealed dilated bronchi and/or regional lung hypodensity. In four of these cases, CT led to the initial suspicion of dilated bronchi. CT should be used early in the evaluation of atypical pulmonary mass lesions or to confirm suspected bronchial impaction because of the high probability it will reveal diagnostic features.

  15. Ileoanal pouches: Comparison of CT, scintigraphy, and contrast enemas for diagnosing postsurgical complications

    SciTech Connect

    Thoeni, R.F.; Fell, S.C.; Engelstad, B.; Schrock, T.B. (Univ. of California, San Francisco (USA))

    1990-01-01

    The value of CT of the pelvis, 111In-labeled leukocyte scintigraphy, and contrast enema (pouchography) for detecting postsurgical complications was assessed in 44 patients with total colectomy, rectal mucosectomy, and ileoanal pouches. Ileoanal pouches were created as reservoirs from an ileal loop that was anastomosed to the dentate line of the anus and stayed connected to the remainder of the ileum. This pouch preserves the normal defecatory pathway and eliminates disease-producing mucosa. A total of 57 sets of examinations revealed 22 cases of normal postoperative findings, 22 of pouchitis, 13 of abscess, and three of fistula. Overall sensitivity for detecting complications with pouchography was 60% (18 of 30 findings); with CT, 78% (28 of 36 findings); and with scintigraphy, 79% (23 of 29 findings). Pouchitis was best diagnosed by scintigraphy (sensitivity, 80%), followed by CT (sensitivity, 71%) and pouchography (sensitivity, 53%). Only CT correctly diagnosed all cases of abscess. Fistulas were frequently missed by all three methods. If tests were combined, the overall sensitivity rose to 93% for the combination CT/scintigraphy and to 86% for CT/pouchography, but did not improve for pouchography/scintigraphy (78%). For evaluation of complications in patients with ileoanal pouches, CT should be the initial test. If an abscess is found, no further tests are needed. If CT findings are negative, a scintigram should be obtained. Our data did not establish a clear role for pouchography.

  16. Chronic osteomyelitis examined by CT

    SciTech Connect

    Wing, V.W.; Jeffrey, R.B. Jr.; Federle, M.P.; Helms, C.A.; Trafton, P.

    1985-01-01

    CT examination of 25 patients who had acute exacerbations of chronic osteomyelitis allowed for the correct identification of single or multiple sequestra in 14 surgical patients. Plain radiographs were equivocal for sequestra in seven of these patients, because the sequestra were too small or because diffuse bony sclerosis was present. CT also demonstrated a foreign body and five soft tissue abscesses not suspected on the basis of plain radiographs. CT studies, which helped guide the operative approach, were also useful in treating those patients whose plain radiographs were positive for sequestra. The authors review the potential role of CT in evaluating patients with chronic osteomyelitis.

  17. CT Scan (CAT Scan)

    NSDL National Science Digital Library

    This patient education program explains the benefits and risks of Computed Axial Tomography, CAT scan or CT scan, and describes the procedure for the test. This is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute. NOTE: The tutorial requires a special Flash plug-in, version 4 or above. If you do not have Flash, you will be prompted to obtain a free download of the software before you start the tutorial. You will also need an Acrobat Reader, available as a free download, in order to view the Reference Summary.

  18. An unusual desaturase in Aquilegia vulgaris.

    PubMed

    Longman, A J; Michaelson, L V; Sayanova, O; Napier, J A; Stobart, A K

    2000-12-01

    Aquilegia vulgaris seed oil contains high levels of the rare fatty acid columbinic acid (18:3 Delta(5,9,12)), which is unusual in having the double bond at the Delta(5) carbon in the trans configuration. Columbinic acid was found to be a seed-specific fatty acid not only present in the storage oil but also in membrane lipids. Several putative gene fragments have been isolated from plant RNA with sequences similar to previously characterized 'front-end' desaturases. Functional characterization of the Aquilegia cDNA is underway. PMID:11171154

  19. Fatal bupivacaine intoxication following unusual erotic practices.

    PubMed

    Yazzie, Janice; Kelly, Sean C; Zumwalt, Ross E; Kerrigan, Sarah

    2004-03-01

    A fatal drug overdose is described which involved unusual erotic practices. A 54-year-old male was discovered supine on the floor surrounded by sexual paraphernalia, syringes, and medications including three empty bottles of bupivacaine. Acute and chronic injection sites of the external genitalia with contusions, scarring, focal necrosis, and calcification were present at autopsy. Toxicology revealed femoral blood, heart blood, and vitreous bupivacaine concentrations of 3.8, 2.8 and 1.3 mg/L, respectively. The urine bupivacaine concentration was 11.4 mg/L. The cause of death was attributed to bupivacaine intoxication and the manner of death was accidental. PMID:15027559

  20. Unusual monocular pendular nystagmus in multiple sclerosis.

    PubMed

    Jasse, Laurence; Vighetto, Alain; Vukusic, Sandra; Pelisson, Denis; Tilikete, Caroline

    2011-03-01

    Two unusual cases of monocular pendular nystagmus in patients with multiple sclerosis are reported. One patient showed regular horizontal oscillations of the right eye in abduction, associated with right abduction paresis. The second patient had a similar abnormal eye movement of the left eye in adduction, with partial left internuclear ophthalmoplegia. Such eye position-dependent monocular pendular nystagmus provides new insights into pathogenic mechanism for acquired pendular nystagmus. Different mechanisms are discussed such as the combination of paresis and commonly accepted hypothesis of dysfunction of visual and/or motor feedback loops in the ocular motor neural network. PMID:21124235

  1. Magnetic monopoles and unusual dynamics of magnetoelectrics.

    PubMed

    Khomskii, D I

    2014-01-01

    The modelling of magnetic monopoles in solids is a hot topic nowadays. Here, I propose that in solids with the linear magnetoelectric effect there should exist, close to electric charges, magnetic textures of magnetic monopole type. Their existence can lead to rather striking consequences, such as (magneto)electric Hall effect, magnetophotovoltaic effect and so on, which can be observed experimentally. In addition, in ordinary magnetoelectric materials not only magnetic monopoles can accompany the charge, but also more complicated local magnetic objects can be created, for example, local toroics, which can also lead to unusual effects in transport and other properties of such systems. PMID:25175827

  2. Unusual intracytoplasmic inclusions in acute myeloblastic leukemia.

    PubMed

    Wolf, D J; Fialk, M A; Mouradian, J; Gottfried, E L; Pasmantier, M W

    1980-01-01

    Unusual intracytoplasmic inclusions within early granulocyte precursor cells from a patient with acute myeloblastic leukemia (AML) are described. Based upon their staining characteristics and electron- and light-microscopic appearance, the inclusions are distinctly different from any previously described. The inclusions display a variety of shapes, including rectangles, squares, circles, ovals, and irregular, globular forms. Most of the inclusions are refractile and crystal-like. The possible composition of these inclusions is discussed. They are compared with inclusions previously described within leukemic and granulocytic cells. PMID:6163354

  3. An unusual cause of subtalar pain and instability: accessory calcaneus.

    PubMed

    Boulet, C; De Maeseneer, M; Everaert, H; Kichouh, M; De Mey, J; Shahabpour, M

    2012-01-01

    We report on a 45-yr-old male sports instructor with chronic pain and instability of the ankle. He was a recreational basketball player, but because of repeated ankle sprains and chronic subtalar pain this activity became impossible. The radiologic findings were compatible with the diagnosis of accessory calcaneus. In an initial therapeutic approach the patient was treated conservatively with taping and physical therapy, but this failed to relieve the symptoms. Next, a ligamentoplasty was performed. The instability improved, but the pain remained the same. Finally the accessory calcaneus was resected and short term follow-up was unremarkable. Accessory calcaneus is an uncommon anatomical variation that may cause subtalar pain and instability. Resection of the accessory bone may be necessary to provide relief of symptoms. Accessory calcaneus can be well demonstrated on CT, SPECT-CT, and MR. MR and nuclear medicine can indicate instability of the accessory bone by showing bone marrow edema on MR or uptake on fusion imaging. PMID:23405487

  4. Renal cell carcinoma of clear type: correlation of CT features with tumor size, architectural patterns, and pathologic staging

    Microsoft Academic Search

    P. Soyer; A.-C. Dufresne; I. Klein; M. Barbagelatta; J. M. Hervé; A. Scherrer

    1997-01-01

    .   The purpose of this study was to report the CT findings of renal cell carcinoma of clear type (RCCCT) and to determine if\\u000a there are characteristic morphologic features in RCCCT with respect to tumor size, architectural patterns, and pathologic\\u000a stage. The CT scans of 35 patients with RCCCT were reviewed retrospectively. The CT findings (tumor size, attenuation patterns,\\u000a presence

  5. Unusual Dermoid Cyst in Oral Cavity

    PubMed Central

    Vieira, Evanice Menezes Marçal; Volpato, Luis Evaristo Ricci; Porto, Alessandra Nogueira; Carvalhosa, Artur Aburad; Botelho, Gilberto de Almeida; Bandeca, Matheus Coelho

    2014-01-01

    Dermoid cysts in oral cavity are unusual lesions. Their etiology is not yet clear and can be associated with trapped cells as a result of the inclusion error resulting in the development into the ectoderm, mesoderm, and endoderm tissues. The aim of this case report is to evidence the presence of a dermoid cyst in the floor of mouth surgically removed. In the present case, the lesion showed soft consistency, floating, regular borders, smooth surface, and the same color as the adjacent mucosa, asymptomatic and measuring 4.5?×?5.5?cm in its greatest diameter. The initial diagnostic was ranula in consequence of the similarity with clinical characteristics and localization. After surgical removal lesion, a fibrotic capsule was identified with a friable material with intensive yellow color. The microscopic exam showed cystic lesion with cavity lined by squamous stratified epithelium hyperorthokeratinized. Cutaneous attachments, such as sebaceous glands and hair follicles, were present in connective adjacent tissue. Surgical intervention is elective in these situations. All dentists must have a thorough knowledge of this unusual lesion. PMID:24818032

  6. Unusual earthquake sequence at offshore Boryeong, Korea

    NASA Astrophysics Data System (ADS)

    Cho, H.; Shin, J.

    2013-12-01

    An unusual earthquake sequence starts to occur on June 4, 2013 at offshore area of which distance about 40 km to the west of Boryeong, Korea. This sequence lasts for two months and is very unusual case regarding current seismic activity in Korea. Korea Institute of Geoscience and Mineral Resources (KIGAM) catalog lists 144 events of the sequence with the magnitude range of ML 1.2 to 3.8, whereas Korea Meteorological Agency (KMA) catalog assigned 93 events the magnitude range of ML 0.7 to 3.5. The sequence consists of small repeating clusters over 20 km by 10 km area instead of a large mainshock preceding a series of small aftershocks. The hypocenter locations of the events are relocated by double-difference algorithm to identify potential caustic fault. Focal mechanism of the largest event ML 3.8 on 12 July show predominant strike-slip faulting and P-axis is horizontal ENE-WSW direction. The solution is compatible to the direction of main stress field in and around the Korean peninsula.

  7. Structure of an unusually stable RNA hairpin

    SciTech Connect

    Varani, G.; Cheong, Chaejoon; Tinoco, I. Jr. (Univ. of California, Berkeley (USA))

    1991-04-02

    The structure of a very common RNA hairpin, 5{prime}GGAC(UUCG)GUCC, has been determined in solution by NMR spectroscopy. The loop sequence, UUCG, occurs exceptionally often in ribosomal and other RNAs, and may serve as a nucleation site for RNA folding and as a protein recognition site. Reverse transcriptase cannot read through this loop, although it normally transcribes RNA secondary structure motifs. A hairpin with that loop displays unusually high thermodynamic stability; its stability decreases when conserved nucleotides are mutated. The three-dimensional structure for the hairpin was derived from interproton distances and scalar coupling constants determined by NMR using distance geometry, followed by restrained energy minimization. The structure was well-defined despite the conservative use of interproton distances, by constraining the backbone conformation by means of scalar coupling measurements. A mismatch G{center dot}U base pair, with syn-guanosine, closes the stem. This hairpin has a loop of only two nucleotides; both adopt C{sub 2{prime}}-endo sugar pucker. A sharp turn in the phosphodiester backbone is stabilized by a specific cytosine-phosphate contact, probably a hydrogen bond, and by stacking of the cytosine nucleotide on the G{center dot}U base pair. The structural features of the loop can explain the unusual thermodynamic stability of this hairpin and its sensitivity to mutations of loop nucleotides.

  8. Unusual dermoid cyst in oral cavity.

    PubMed

    Vieira, Evanice Menezes Marçal; Borges, Alvaro Henrique; Volpato, Luis Evaristo Ricci; Porto, Alessandra Nogueira; Carvalhosa, Artur Aburad; Botelho, Gilberto de Almeida; Bandeca, Matheus Coelho

    2014-01-01

    Dermoid cysts in oral cavity are unusual lesions. Their etiology is not yet clear and can be associated with trapped cells as a result of the inclusion error resulting in the development into the ectoderm, mesoderm, and endoderm tissues. The aim of this case report is to evidence the presence of a dermoid cyst in the floor of mouth surgically removed. In the present case, the lesion showed soft consistency, floating, regular borders, smooth surface, and the same color as the adjacent mucosa, asymptomatic and measuring 4.5?×?5.5?cm in its greatest diameter. The initial diagnostic was ranula in consequence of the similarity with clinical characteristics and localization. After surgical removal lesion, a fibrotic capsule was identified with a friable material with intensive yellow color. The microscopic exam showed cystic lesion with cavity lined by squamous stratified epithelium hyperorthokeratinized. Cutaneous attachments, such as sebaceous glands and hair follicles, were present in connective adjacent tissue. Surgical intervention is elective in these situations. All dentists must have a thorough knowledge of this unusual lesion. PMID:24818032

  9. Unusual Non-Occupational Exposure to Metals

    PubMed Central

    Wrbitzky, Renate

    2003-01-01

    Exposure to metals at workplaces is well known and in many cases occupational studies led to an adoption of limit values. For airborne concentrations of substances as metals refer to the “Maximaleo Arbeitsplatz-Konzentration” (MAK) in Germany or the “Threshold Limit Value” (TLV) in USA. Biological monitoring consists of an assessment of overall exposure to chemicals at the workplace and in the environment. The “Biologischer Arbeitsstoff Toleranzwert” (BAT) in Germany and the “Biological Exposure Index” in the USA serve as reference values. Besides these occupational limit values, reference values exist in Germany for the background exposure of the non occupationally exposed general population. In some cases the reference values are exceeded without any occupational exposure. Several cases of unusual environmental exposure to cobalt, mercury and manganese are reported. In such cases, it is often difficult to evaluate the measured concentration. In Germany, therefore, the “Human-Biomonitoring-Werte” (HBMValues) have been adopted in order to evaluate such high background exposures. The HBM-concept is presented. Environmental exposure to metals is usual within some limits. Reference values are helpful for an assessment. Unusual exposure occurs and the physician should be alert to symptoms of poisoning. PMID:18365042

  10. Etanercept-induced sarcoidosis in rheumatoid arthritis: FDG PET findings.

    PubMed

    Nakajima, Reiko; Abe, Koichiro; Nakajima, Ayako; Nishikawa, Toshio; Sakai, Shuji

    2015-01-01

    We report the F-FDG PET/CT findings of an etanercept-induced sarcoidosis in a patient with rheumatoid arthritis. A 68-year-old woman with rheumatoid arthritis who had been treated with etanercept and methotrexate showed multiple lung nodules and hilar lymph node swellings on CT. She underwent FDG PET/CT for cancer screening. Intense FDG uptakes were found in the multiple lung nodules, bilateral hilar lymph nodes, a periurethral masslike lesion, and cranial meningeal nodules. A histopathological examination revealed epithelioid granuloma with multinucleated giant cells, which was compatible with sarcoidosis. PMID:25188646

  11. Multislice CT Scans in Patients on Extracorporeal Membrane Oxygenation: Emphasis on Hemodynamic Changes and Imaging Pitfalls

    PubMed Central

    Liu, Kao-Lang; Wang, Yu-Feng; Chang, Yeun-Chung; Huang, Shu-Chien; Chen, Shyh-Jye; Tsang, Yuk-Ming

    2014-01-01

    This pictorial review provides the principles of extracorporeal membrane oxygenation (ECMO) support and associated CT imaging features with emphasis on the hemodynamic changes and possible imaging pitfalls encountered. It is important that radiologists in ECMO centers apply well-designed imaging protocols and familiarize themselves with post-contrast CT imaging findings in patients on ECMO. PMID:24843236

  12. Unusual case of Klippel-Trenaunay syndrome a case report and review of the literature

    Microsoft Academic Search

    Suhas M. Nafday; R. A. Heiden; Dinker B. Rai

    2000-01-01

    A 15-year-old Indian boy from Guyana presented with episodes of syncope for past 4 years. Klippel-Trenaunay was entertained based on presence of capillary hemangioma and gross venous malformation of left leg. Unusual features noticed were “orthostatic hypotension as a presentation,” atrophy of leg as contrasted to common finding of hypertrophy, skeletal hypoplasia, abnormal venous and arterial features. Surgical management was

  13. An Unusual Case of Bilateral Maxillary and Mandibular Para Premolar: A Case Report

    PubMed Central

    Chanagay, Sunil Kumar Vishwanath; Singh, Vikram; Bantwal, Sunil Rao; Muniyappa, Manjunatha

    2013-01-01

    The presence of supernumerary teeth is not uncommon in the general population. They occur more frequently in patients with a family history of such teeth. It is rare to find multiple supernumeraries in individuals with no other associated disease or syndrome. There have been very few documented cases of bilateral maxillary and mandibular supernumeraries in the premolar region. An unusual case of a 35-year-old man with six para premolars and complete dentition is presented. PMID:24396358

  14. Synchronous ileocecal neuroendocrine tumor and carotid chemodectoma: diagnosis by 111In pentetreotide SPECT/CT.

    PubMed

    Wisotzki, Christian; Jacobsen, Frank; Salamon, Johannes; Derlin, Thorsten

    2014-06-01

    We report a case of carotid chemodectoma diagnosed by In pentetreotide SPECT/CT. A 72-year-old woman with an ileocecal neuroendocrine tumor underwent whole-body In pentetreotide scintigraphy for exclusion of distant metastases. Planar scintigraphy demonstrated marked tracer uptake in the ileocecal region and intense focal tracer accumulation within the neck. SPECT/CT demonstrated a space-occupying lesion at the carotid bifurcation. Histopathological evaluation revealed carotid chemodectoma. SPECT/CT is a valuable tool for the evaluation and precise anatomical localization of tracer uptake. In addition, other benign or malignant pathologies accumulating In pentetreotide may mimic neuroendocrine tumor metastases and should be considered particularly in unusual localizations. PMID:24097001

  15. Histoplasmosis of the adrenal glands studied by CT

    SciTech Connect

    Wilson, D.A.; Muchmore, H.G.; Tisdal, R.G.; Fahmy, A.; Pitha, J.V.

    1984-03-01

    Computed tomography (CT) of the adrenal glands was performed on seven patients who had histologically proved disseminated histoplasmosis. All seven patients showed some degree of adrenal gland abnormality. The range of CT findings included minimal enlargement with faint flecks of calcium, moderate enlargement with focal low attenuation nodules, and massive enlargement with large areas of necrosis or dense calcification. The changes in each patient were bilateral and symmetrical. Adrenal gland shape was usually preserved. Finding of percutaneous adrenal biopsy, which was performed under CT guidance, made the diagnosis in one patient. Five of seven patients had adrenal insufficiency. It is concluded that the diagnosis of disseminated histoplasmosis should be considered in any patient who has bilateral adrenal gland enlargement and who resides in an endemic area, especially if there is evidence of adrenal insufficiency.

  16. Fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) for the detection of skeletal muscle and skin metastases in uterine leiomyosarcoma: a case report.

    PubMed

    Ozdemir, E; Poyraz, N Y?ld?r?m; Uzun, B; Türkölmez, S

    2013-01-01

    We report the clinical value of FDG PET/CT imaging in a 57-year-old woman who was diagnosed with uterine leimyosarcoma 6 years ago. In a staging procedure, whole body FDG PET/CT discloses the presence of both local recurrence and remote metastases at widespread musculocutaneous sites, liver and femur. With its advantage of scanning the whole body in a single procedure, we propose the use of PET/CT imaging for the evaluation of patients with uterine leimyosarcomas, a tumor with a propensity for widespread hematogenous spread to unusual sites. PMID:23153988

  17. Brief communication: unusual finding at Pueblo Bonito: multiple cases of hyperostosis frontalis interna.

    PubMed

    Mulhern, Dawn M; Wilczak, Cynthia A; Dudar, J Christopher

    2006-08-01

    Hyperostosis frontalis interna (HFI) is a disease characterized by excess bone growth on the internal lamina of the frontal bone and, occasionally, other cranial bones. Although the disease is fairly common in modern populations, its etiology is poorly understood. Hyperostosis frontalis interna has been identified in antiquity, primarily in the Old World, but with a much lower frequency than in modern groups. The purpose of the present study is to report multiple cases of HFI at Pueblo Bonito (Chaco Canyon, New Mexico). Twelve out of 37 adults with observable frontal bones exhibited HFI, ranging from mild to severe, including 11 females and one male. This is the first published case report of HFI in archaeological remains from the New World having a frequency comparable with modern groups. Most archaeological cases of HFI are isolated, so comparative data for multiple cases at one site are rare. The results of this study emphasize the importance of looking for HFI in archaeological remains, although it is rarely observed. Possible genetic and environmental factors for the high frequency of HFI at Chaco Canyon are considered, but additional research is needed to discover the etiology and to better understand why HFI sometimes occurs at modern frequencies in ancient populations. PMID:16444722

  18. Aromatic l-aminoacid decarboxylase deficiency: unusual neonatal presentation and additional findings in organic acid analysis.

    PubMed

    Abdenur, Jose E; Abeling, Nico; Specola, Norma; Jorge, Lia; Schenone, Andrea B; van Cruchten, Arno C; Chamoles, Nestor A

    2006-01-01

    Aromatic l-aminoacid decarboxylase (AADC) deficiency is a neurotransmitter defect leading to a combined deficiency of catecholamines and serotonin. Patients are usually detected in infancy due to developmental delay, hypotonia, and extrapyramidal movements. Diagnosis is based on an abnormal neurotransmitter metabolite profile in CSF and reduced AADC activity in plasma. An elevation of vanillactic acid (VLA) has been described as the only abnormality detected in organic acid analysis (OA) of urine. We report a patient who presented in the neonatal period with lethargy, hypotonia, metabolic acidosis, and hypoglycemia. Blood ammonia, lactic acid, and acylcarnitines were normal, but OA of a urine sample showed a small increase of VLA, raising the suspicion of AADC deficiency. The patient was lost to follow-up until the age of 8 months, when he presented with dystonia, abnormal movements, oculogyric crises, and hypothermia. Repeat OA showed not only increased levels of VLA, but also increased vanilpyruvic acid (VPA), N-acetyl-vanilalanine (AVA) and N-acetyl-tyrosine (NAT). Neurotransmitter analysis in CSF showed increased vanilalanine (1200 nmol/L, ref<100) with decreased levels of 5-hydroxy-indoleacetic acid (5-HIAA, < 5 nmol/L; ref 152-462), homovanillic acid (HVA, 83 nmol/L; ref 302-845), and methoxy-hydroxy-phenyl-glycol (<5 nmol/L; ref 51-112). AADC activity in plasma was nearly undetectable. In the urine, low excretion of vanilmandelic acid (<0.3 micromol/mmol creat; ref 0.3-20) and 5-HIAA (0.9 micromol/mmol creat; ref 4-18), was found, but HVA was normal and dopamine even elevated. This contradictory phenomenon of hyperdopaminuria has been described earlier in AADC deficient patients. We postulate that VPA and AVA could originate from vanilalanine (through a transaminase and an acetylase respectively), while NAT could originate from tyrosine through an AA acetylase. This report expands the clinical presentation of AADC deficiency and adds new markers of the disease for OA analysis, improving detection of AADC deficient patients in general metabolic screening procedures. PMID:16288991

  19. Unusual association of Meckel's diverticulum with double appendix – A rare finding

    PubMed Central

    Panda, Sangram Keshari; Prasad, C.; Tirkey, Roshni; Rajesh, V.; Mishra, Jagadananda; Dora, Rajesh Kumar

    2014-01-01

    INTRODUCTION Appendix duplication is an extremely rare congenital anomaly that is seen in 0.004–0.009% of appendectomy specimens. Duplicated appendix may be associated with number of congenital anomalies. PRESENTATION OF CASE In this case report, we are presenting a rare case of duplicated vermiform appendix with a co-existing Meckel's diverticulum. DISCUSSION Anomalies of appendix are rare and duplication of vermiform appendix is extremely rare. In 1936, Cave classified appendiceal duplication for the first time which was modified by Wallbridge in 1963 into three types. Concomitant malformations or duplications of the large intestine or the genitourinary system may be present, especially in types B1 and C probably due to their similar embryological origin. Here we are presenting a very rare case report of type B1 appendix anomaly associated with Meckel's diverticulum. CONCLUSION Surgeons should be aware of these conditions because of the possible clinical implications. PMID:25462057

  20. FINFISH HEALTH IN THE UNITED STATES (1797 TO 1920): PIONEERING INVESTIGATORS, EARLY FINDINGS AND UNUSUAL TREATMENTS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Several notable men set the stage for the development and growth of fish health in the United States including: White House surveyor, Benjamin H. Latrobe, world renowned physician and naturalist, Joseph P. Leidy, essayist, poet, and philosopher, Henry D. Thoreau, clergyman and premier fish culturist...

  1. HOT SAX: Efficiently Finding the Most Unusual Time Series Subsequence Eamonn Keogh Jessica Lin

    E-print Network

    Fu, Ada Waichee

    with objective experiments on domains as diverse as Space Shuttle telemetry monitoring, medicine, surveillance anomalies in domains as diverse as Space Shuttle telemetry, industry, and medicine. One reason why discords access to huge amounts of training data, even then, avoiding overfitting remains a challenge. This paper

  2. An Unusual Graduate Program Requires Students To Find and Pay Their Professors.

    ERIC Educational Resources Information Center

    Guernsey, Lisa

    1998-01-01

    In a graduate program operated by Antioch University (Ohio), students design their own courses of study and hire their own instructors, paying them out-of-pocket. The program is fully accredited. Scholars who provide education in the traditional way are questioning whether their disciplines are being enhanced or undermined by this and other…

  3. Pulmonary oedema in breath-hold diving: an unusual presentation and computed tomography findings.

    PubMed

    Gempp, Emmanuel; Sbardella, Fabrice; Cardinale, Mickael; Louge, Pierre

    2013-09-01

    Haemoptysis and pulmonary oedema following deep breath-hold diving have been described in recent years. We describe the case of a 33-year-old healthy military diver who presented symptoms suggestive of pulmonary oedema after two breathhold dives, the first lasting 0.5-1 min and the second 1-2 min, to 6 metres' depth in the sea. The diagnosis was promptly confirmed with chest computed tomography showing bilateral interstitial infiltrates in the upper regions of the lungs. To our knowledge, this is the first report to document pulmonary oedema in this setting of shallow breath-hold diving with atypical radiological presentation. A definite mechanism for this specific distribution of lung injury remains unclear. PMID:24122192

  4. Pituitary involvement in Wegener’s granulomatosis: unusual biochemical findings and severe malnutrition

    PubMed Central

    Jimenez, Carmen Tenorio; Valdivieso, Amparo Montalvo; Gallardo, Gema López; Mcgowan, Barbara

    2011-01-01

    Wegener’s granulomatosis (WG) is a systemic disease with a complex genetic background. It is characterised by inflammation of the small blood vessels leading to damage in any number of organs. The common features include granulomatous inflammation of the respiratory tract and kidneys. Most patients have measurable autoantibodies against neutrophil proteinase-3 (Antineutrophil Cytoplasmic Antibody, ANCA). Pituitary involvement is a rare complication of this disease and, when it occurs, diabetes insipidus is the most common manifestation. We describe a 38-year-old female with known long-term WG who presented with partial hypopituitarism, severe malnutrition and ANCA negative status, with a favourable response to steroid pulse therapy. PMID:22673710

  5. Typical MDCT Angiography Findings of an Unusual Cutaneous Neoplasia; Masson Tumor

    PubMed Central

    Tutar, Onur; Samanci, Cesur; Bakan, Selim; Alis, Denizcan; Kaur, Ahmet; ?anl?, Deniz Tekcan; Yildirim, Duzgun

    2015-01-01

    Summary Background Intravascular papillary endothelial hyperplasia (IPEH), also known as masson tumour, is a lesion composed of proliferating endothelial cells. Case Report In this article we explained clinical, histological and radiological features of IPEH involving the scalp, localized on the left side of the skull and in the periauricular region. Conclusions Radiologically, intravascular papillary endothelial hyperplasia could be misdiagnosed as malignant or benign vascular tumour. On cross-sectional imaging it is useful demonstrating the extremely vascular component of IPEH. But IPEH has no specific radiologic features that we can use to differentiate from the aforementioned lesions. Due to that, histopathological examinations are needed to diagnose IPEH. PMID:25624958

  6. Gallstone ileus obstructing within an incarcerated lumbar hernia: an unusual presentation of a rare diagnosis.

    PubMed

    Ziesmann, Markus Tyler; Alotaiby, Nouf; Al Abbasi, Thamer; Rezende-Neto, Joao B

    2014-01-01

    We describe an unusual case of a 74-year-old woman who presented with signs and symptoms of small-bowel obstruction and a clinically appreciable, irreducible, left-sided lumbar hernia associated with previous iliac crest bone graft harvesting. Palpation of the hernia demonstrated a small, firm mass within the loops of herniated bowel. CT scanning recognised an intraluminal gallstone at the transition point, establishing the diagnosis of gallstone ileus within an incarcerated lumbar hernia. The proposed explanatory mechanism is that of a gallstone migrating into an easily reducible hernia containing small bowel causing obstruction at the hernia neck by a ball-valve mechanism, resulting in proximal bowel dilation and thus hernia incarceration; it remains unclear when the stone entered the hernia, and whether it enlarged in situ or prior to entering the enteral tract. This is only the second reported instance in the literature of an intraluminal gallstone causing hernia incarceration. PMID:25471112

  7. Unusual case of acute tracheal injury complicated by application of positive end expiratory pressure (PEEP).

    PubMed

    Farooqui, Asif Masroor; Mbarushimana, Simon; Faheem, Mohammad

    2014-01-01

    Blunt neck trauma can be caused by a variety of injuries such as deceleration, road traffic accidents and crush injuries. The worst scenario is airway rupture. We report an unusual case of acute tracheal injury in a 34-year-old Irish man who presented with a history of strangulation while working with a tractor. On arrival, he had one episode of mild haemoptysis and reported pain around the base of the neck and voice hoarseness. His chest X-ray revealed pneumopericardium and CT of thorax showed airway oedema. After elective intubation, positive end-expiratory pressure (PEEP) of 5 cm H2O caused deterioration in his clinical condition with increasing surgical emphysema and rise of carbon dioxide partial pressure (PaCO2), which was completely reversed after stopping PEEP. This case shows how PEEP and intermittent positive pressure ventilation can worsen air leak and compromise stability in patients with acute tracheal injury. PMID:25398917

  8. Dynamic volume CT: the next revolution in clinical CT

    NASA Astrophysics Data System (ADS)

    Boedeker, Kirsten; Mather, Rich

    2008-08-01

    The need for table motion in multi-detector CT causes image volumes acquired for whole organ motion and perfusion studies to lack temporal uniformity. The next revolution in clinical CT, dynamic volume CT, mitigates this limitation by providing the ability to acquire an entire organ with isotropic resolution in a single gantry rotation with no table movement. The first dynamic volume CT scanner has recently been introduced and comprises 320 detector rows of 0.5mm channel thickness, covering 16cm of anatomy in one rotation of 0.35sec. This scanner offers many advancements in terms of temporal uniformity, reconstruction, and radiation dose. This system significantly reduces motion artifact and eliminates contrast phase differences within the volume. Because this scanner does not require helical acquisition for volumetric imaging, it delivers significantly less dose for applications such as CT coronary angiography exams as well as reduced dose in most other applications. Furthermore, by eliminating table motion, the need for complex interpolation methods that can distort cardiac images is removed. Image quality is not sacrificed compared with standard 64-row CT scanners, as demonstrated via low contrast, resolution, and accuracy measurements presented in this work. By capturing the entire brain in one rotation, brain perfusion, bone subtraction, and quantitative perfusion analysis are now possible with a single low dose exam. Dynamic volume CT offers to change the way medicine approaches stroke patients, myocardial perfusion studies, and imaging of other moving body parts such as the lung and joints.

  9. Structural characterization of unusually stable polycyclic ozonides

    NASA Astrophysics Data System (ADS)

    Cusati, R. C.; Pereira, U. A.; Barbosa, L. C. A.; Maltha, C. R. A.; Carneiro, José W. M.; Corręa, R. S.; Doriguetto, A. C.

    2015-02-01

    The single crystal structure of seven tri- and tetracyclic ozonides derived from 8-oxabicycle[3.2.1]oct-6-en-3-ones have been characterized by X-ray diffraction method. Five ozonides (4, 5, 6, 7 and 8) crystallize in the monoclinic crystal system with P21/c space group. Compound 3 crystallize in the unusual centrosymmetric space group R 3 bar m, which represents ?0.04% of the total number of structures know. The supramolecular structure of 3 forms infinite channels in a hexagram fashion, resulting in a honeycomb-like structure. Semi-empirical (PM6) and density functional theory methods (DFT) with the B3LYP functional and the 6-31G(d) basis set were used to optimize the geometries and compute structural parameters (bond lengths, angles and dihedral angles) that could be compared to the refined crystal structure. The theoretical results show good agreements with the experimental structure.

  10. Painless vertebral osteomyelitis: an unusual presentation

    PubMed Central

    Sohatee, Mark Andrew; Shields, David William

    2013-01-01

    Vertebral osteomyelitis or discitis is a condition characterised by inflammation to the vertebral disc space and is often related to infection. It usually involves the discovertebral junction, and may extend to the epidural space, posterior vertebral elements and paraspinal tissues. This is an unusual case of a 68-year-old gentleman who presented to hospital confused and unwell with a methicillin-resistant Staphylococcus aureus bacteraemia. Clinical examination and routine investigations revealed no obvious source of infection. Despite thorough examination of his spine, no back pain or focal neurology were elicited, but with no obvious source of infection MRI of the spine was carried out which revealed a vertebral osteomyelitis with paravertebral abscess formation. PMID:23505083

  11. New and unusual scaffolds in medicinal chemistry.

    PubMed

    Marson, Charles M

    2011-11-01

    Contemporary medicinal chemistry faces diverse challenges from several directions, including the need for both potency and specificity of any therapeutic agent; the increasingly demanding requirements of low toxicity shown across all patients treated; and the need for novelty in intellectual property, given the extensive use of benzenoid and heteroaromatic ring systems in numerous patents. Increasingly, such challenges are being met by a shift to new and/or unusual ring systems (scaffolds) that lie outside the field of (hetero)aromatic systems. This critical review surveys a necessarily limited selection of currently atypical scaffolds, chiefly drawn from the literature of the last three years, that have found application in medicinal chemistry, some being present in agents with therapeutic potential while others are found in agents already in clinical use (163 references). PMID:21837344

  12. Unusual isolated tubercolous epididymitis. Case report

    PubMed Central

    DELL’ATTI, L.

    2014-01-01

    We present an unusual case of tuberculous epididymitis in a 33-year-old African patient, who was referred to our Department of Urology with a right intrascrotal mass. There was no evidence of fever, hematuria, dysuria or symptoms from the lower urinary tract. The patient did not demonstrate any laboratory signs of inflammation (white blood cells, C reactive protein). Scrotal sonography revealed a solid heterogeneous, hypoecoic lesion between the epididymal head and the upper testis pole, with disruption of the architecture of the testicular parenchyma. Strong ultrasound suspicion of tuberculous etiology was confirmed by epididymectomy and partial orchiectomy. The patient started an antitubercular treatment. Although rare, epididymal TB may be the only clinically evident location of infection. Clinical suspicion and prompt diagnosis are important because earlier treatment can prevent complications and lead to clinical improvement. PMID:24979105

  13. An unusual association of Goldenhar syndrome.

    PubMed

    Seymeno?lu, Göktu?; Ba?er, Esin; Tansu?, Nermin; Demireli, Peyker

    2013-02-01

    Goldenhar syndrome is well known for its classical triad of epibulbar dermoids or lipodermoids, auricular appendages and pretragal fistulas. Here we report a case of Goldenhar syndrome with an unusual association of a fibroepithelial polyp attached to a limbal dermoid. A case of Goldenhar syndrome in a 5-month-old male infant presented with the features of a fibroepithelial polyp attached to a limbal dermoid, right-sided polydactylia with hypoplastic thumb, and accessory preauricular appendages on the left side. The association of a fibroepithelial polyp attached to a limbal dermoid with Goldenhar syndrome is a rare report in the literature. In these cases, regular follow-up with an ophthalmologist is important to monitor the visual development of the patient. Ideally, a multidisciplinary approach is required to manage the other associated anomalies. PMID:23053767

  14. Unusual hydrophobic interactions in acidic aqueous solutions.

    PubMed

    Chen, Hanning; Xu, Jianqing; Voth, Gregory A

    2009-05-21

    Hydrophobic interaction, which is believed to be a primary driving force for many fundamental chemical and biological processes such as nanostructure self-assembly, micelle formation, and protein folding, is different in acidic aqueous solutions compared to salt solutions. In this study, the aggregation/dispersion behavior of nonpolar hydrophobic molecules in aqueous solutions with varying acid (HCl) concentrations is investigated using novel molecular dynamics simulations and compared to the hydrophobic behavior in corresponding salt (NaCl) solutions. The formation of unusual weakly bound hydrophobe-hydrated proton solvation structures is observed and can be attributed to the unique "amphiphilic" characteristic of hydrated protons. This molecular-level mechanism for the acid-enhanced dissolution of hydrophobic particles also provides a novel interpretation for the apparent anomaly of the hydronium cation in the Hofmeister series. PMID:19405494

  15. Keratoacanthoma centrifugum marginatum at an unusual site.

    PubMed

    Phiske, Meghana M; Avhad, Ganesh; Jerajani, Hr

    2013-01-01

    Keratoacanthoma (KA) is a rapidly evolving tumor, composed of keratinizing squamous cells originating in pilosebaceous follicles and resolving spontaneously if left untreated. It is relatively uncommon in dark-skinned and occurs in middle aged individuals. Males are three times more affected than females. It presents as firm, rounded, flesh-colored or reddish papule; with a rapid growth phase followed by spontaneous healing over three months. Two types of KA exist i.e., solitary and multiple. There are three rare clinical variants of solitary KA, namely giant KA, keratoacanthoma centrifugum marginatum (KCM) and subungual KA. In KCM, lesions are large, reaching upto 20cms. There is peripheral extension with raised, rolled border and atrophy in the center. There is no tendency toward spontaneous involution. The most common locations are dorsa of hands and legs, lesions on scalp being rare. A rare case of KCM occurring on scalp which is an unusual site is reported. PMID:23372220

  16. An unusual case of palmoplantar keratoderma.

    PubMed

    Devos, S A; Delescluse, J

    2003-01-01

    A 55-year-old woman with palmoplantar keratoderma presented an associated hyperhidrosis with distinct odour and maceration. She had had the lesions for about 20 years and this seemed to be an isolated case in her family. This case appeared very unusual because there were no signs of acanthokeratolysis in the biopsies. Two months of treatment with acitretin (Neotigason; 25 mg daily), produced a spectacular result: clearance of all the lesions on both hands and a strong diminution of the lesions on the soles. The Unna-Thost variant of palmoplantar keratoderma usually appears in the first few months of life, and it rarely appears in the third decade. The condition is inherited as an autosomal dominant with high penetrance and expressivity. Our subject appeared to be an exception to these two facts. PMID:12602975

  17. Supernumerary teeth: Report of four unusual cases

    PubMed Central

    Kumar, Arun; Namdev, Ritu; Bakshi, Lokesh; Dutta, Samir

    2012-01-01

    Supernumerary tooth denotes duplication of tooth in the normal series. It is a developmental anomaly and has been argued to arise from multiple etiologies. These teeth may remain embedded in the alveolar bone or can erupt into the oral cavity. The supernumerary tooth might cause esthetic and/or functional problems, especially if it is situated in the maxillary anterior region. Complications reported were delayed or prevented eruption of succedaneous teeth, displacement or rotation, crowding of the affected region, abnormal diastema, dilacerations, cystic formation, and sometime eruption into the nasal cavity. In this case report, four unusual cases of supernumerary teeth that resulted in varying degrees of disturbances in permanent dentition are presented. Conservative surgical intervention and light orthodontic forces were used to bring the teeth into normal position with minimal disturbance to the surrounding oral structures. PMID:22629072

  18. Unusual intraosseous transmigration of impacted tooth

    PubMed Central

    Urala, Arun Srinivas; Kamath, Abhay Taranath; Jayaswal, Priyanka; Valiathan, Ashima

    2012-01-01

    Transmigration of an impacted tooth through the symphyseal suture is a rare and special developmental anomaly of unknown etiology that is unique to the mandibular canine. Maxillary canine transmigration is even rarer. Transmigrated canines are particularly significant due to the aesthetic and functional importance. A maxillary lateral incisor crossing the mid-palatal suture has never been reported in the literature. The aim of this report is to present the first case of simultaneous transmigration of a lateral incisor and canine in the maxilla. The paper also reports four unusual cases of unilateral canine transmigration in the maxilla and mandible and successful eruption of one of the transmigrated mandibular canines following orthodontic traction. Etiology of transmigration and its clinical considerations are also discussed. PMID:22474648

  19. Birth of an Unusual Planetary System

    NASA Technical Reports Server (NTRS)

    2005-01-01

    This artist's animation shows a brown dwarf surrounded by a swirling disc of planet-building dust. NASA's Spitzer Space Telescope spotted such a disc around a surprisingly low-mass brown dwarf, or 'failed star.' The brown dwarf, called OTS 44, is only 15 times the size of Jupiter, making it the smallest brown dwarf known to host a planet-forming, or protoplanetary disc.

    Astronomers believe that this unusual system will eventually spawn planets. If so, they speculate that OTS 44's disc has enough mass to make one small gas giant and a few Earth-sized rocky planets.

    OTS 44 is about 2 million years old. At this relatively young age, brown dwarfs are warm and appear reddish in color. With age, they grow cooler and darker.

  20. Fluoride and bone: an unusual hypothesis.

    PubMed

    Smith, G E

    1985-03-01

    Given the total body weight, the weight of the skeleton and the proportion of minerals in the skeleton, a simple formula can be used to estimate the accumulation of fluoride in the skeleton over periods of years. It would appear that daily intakes of fluoride considered beneficial to developing teeth may, if ingested throughout adult life, lead to skeletal fluorosis of varying degrees in a significant proportion of the population. To date, the accumulation of fluoride in the skeleton seems to have been ignored as a possible aetiological factor in certain metabolic bone disorders now common in the middle-aged and elderly. The unusual hypothesis put forward in this paper suggests that a daily intake of fluoride derived from a multiplicity of sources, and which is now generally considered as 'safe', may in fact be potentially harmful over long periods of time. PMID:4024655

  1. Imaging of the unusual pediatric ‘blastomas’

    PubMed Central

    Sebire, Neil J.; McHugh, Kieran

    2009-01-01

    Abstract ‘Blastomas’ are tumors virtually unique to childhood. Controversy surrounds their nomenclature and there is no globally accepted classification. They are thought to arise from immature, primitive tissues that present persistent embryonal elements on histology, affect a younger pediatric population and are usually malignant. The ‘commoner’ blastomas (neuroblastoma, nephroblastoma, hepatoblastoma, medulloblastoma) account for approximately 25% of solid tumors in the pediatric age range. We present examples of the more unusual blastematous pediatric tumors (lipoblastoma, osteoblastoma, chondroblastoma, hemangioblastoma, gonadoblastoma, sialoblastoma, pleuropulmonary blastoma, pancreatoblastoma, pineoblastoma, and medullomyoblastoma) that were recorded in our institution. Although these rare types of blastomas individually account for <1% of pediatric malignancies, collectively they may be responsible for up to 5% of pediatric tumors in a given population of young children. Imaging is often non-specific but plays an important role in their identification, management and follow-up. Some characteristic imaging features at diagnosis, encountered in cases diagnosed and treated in our institution, are described and reviewed. PMID:19237343

  2. Aggressive angiomyxoma of pelvic soft tissue: CT appearance

    Microsoft Academic Search

    J. Llauger; C. Pérez; P. Coscojuela; J. Palmer; J. Puig

    1990-01-01

    A case of aggressive angiomyxoma of pelvic tissue is described. The characteristic clinical presenting symptoms together with\\u000a radiographic findings can be suggestive of this disease. Computed tomography (CT) clearly depicted a solid mass in the pelvis\\u000a without invasion of visceral structures and reaching caudally into the perineal region.

  3. Intra-abdominal abscess demonstrating an unusually large intra-abdominal pattern on an indium-111 leukocyte scan

    SciTech Connect

    Black, R.R.; Fernandez-Ulloa, M.; ter Penning, B.; Yellin, J.

    1988-12-01

    Indium-111 WBC imaging of a patient with occult septicemia revealed a large focal pattern of radiopharmaceutical distribution within the abdominal cavity at 24 hours post radiopharmaceutical administration. This finding was felt to represent a large intra-abdominal abscess. A five liter peritoneal abscess was found at surgery. This case illustrates an unusual presentation of an intra-abdominal abscess.

  4. Unusual diagnosis of a persistent third-degree atrioventricular block during anesthesia in a “healthy” pediatric patient

    PubMed Central

    Alsayegh, Yasser; Abdallah, Claude

    2012-01-01

    We present an unusual diagnosis of a permanent third-degree atrioventricular block under general anesthesia in an otherwise healthy and asymptomatic child. This diagnosis of unclear causality represented a serious rare finding, requiring judicious management and resulting in the placement of a permanent pacemaker. PMID:22412781

  5. MULTIMODALITY IMAGING: BEYOND PET/CT AND SPECT/CT

    PubMed Central

    Cherry, Simon R.

    2009-01-01

    Multimodality imaging with PET/CT and SPECT/CT has become commonplace in clinical practice and in preclinical and basic medical research. Do other combinations of imaging modalities have a similar potential to impact medical science and clinical medicine? The combination of PET or SPECT with MRI is an area of active research at the present time, while other, perhaps less obvious combinations, including CT/MR and PET/optical also are being studied. In addition to the integration of the instrumentation, there are parallel developments in synthesizing imaging agents that can be viewed by multiple imaging modalities. Is the fusion of PET and SPECT with CT the ultimate answer in multimodality imaging, or is it just the first example of a more general trend towards harnessing the complementary nature of the different modalities on integrated imaging platforms? PMID:19646559

  6. [Three-dimensional CT of the ossicles of the middle ear].

    PubMed

    Edamatsu, H; Yamashita, K

    1995-02-01

    This study was performed to evaluate the usefulness and limitations of three-dimensional (3-D) imaging of the ossicular chain in the middle ear by high speed helical CT. One dissected human temporal bone, five normal ears, and twelve diseased ears (trauma, ossicular anomaly, cholesteatoma, chronic otitis media) were scanned in 1.0mm slices and reconstructed at a thickness of 0.2-0.5mm. All 3-D CT specimens can be observed in any plane and from any direction. Ossicular 3-D CT temporal bone images were reconstructed as if the malleus, incus and stapes were being observed under a microscope. No defect in the ossicles or their joints was seen in the images. The entire structure of the stapes could not be represented by conventional two-dimensional CT, but the 3-D CT in our study showed the head, crus and foot plate of the stapes in detail. Ossicular 3-D CT images of normal ears yielded the same findings as those recorded in the temporal bone. Preoperative diagnostic findings of ossicles in diseased ears were very useful. 3-D CT was diagnostic and its accuracy was confirmed by surgical observations, especially in ossicular anomalies. 3-D CT was also an important method of postoperative evaluation of ossicular reconstruction, i.e. TORP and PORP. It could represent the anatomical relation between prosthesis and the oval window. Postoperative hearing improvement can be compared with 3-D CT findings. High-speed helical CT can scan an object more quickly and clearly than conventional CT, and its biological damage in humans is less than that of other methods. PMID:7707182

  7. Serum tumor markers and PET/CT imaging for tumor recurrence detection.

    PubMed

    Kruse, Vibeke; Cocquyt, Veronique; Borms, Marleen; Maes, Alex; Van de Wiele, Christophe

    2013-02-01

    When confronted with a suspicious rise in CA 15.3 in asymptomatic breast cancer patients following primary treatment and negative or equivocal conventional imaging findings, FDG PET/CT allows assessment of the site and extent of the recurring disease with an accuracy of 83%. Both FDG PET and FDG PET/CT are superior when compared to CT alone for the purpose of recurrence detection in patients suffering from ovarian carcinoma who have completed primary therapy but demonstrate a rising serum CA-125 level. As the global accuracy of CT alone for detection of recurrence of ovarian cancer approximates 80%, CT scan should be performed upfront to identify the site of recurrence. When confronted with negative or equivocal CT findings, FDG PET alone or FDG PET/CT should be added. In patients with rising serum CEA levels that have undergone primary treatment for a colorectal carcinoma, both FDG PET and FDG PET/CT allow detection of tumor recurrence with an accuracy of 95%, well above that of CT and MRI. Available studies further suggest that FDG/PET findings will affect treatment management in 28-50% of these patients. The detection rate of both 11C-choline and 18F-choline PET and PET/CT for local, regional, and distant recurrence in prostate carcinoma patients with a biochemical recurrence increases with rising PSA value at the time of imaging and reaches about 75% in patients with PSA > 3 ng/mL. Furthermore, PET and PET/CT with [11C]- and [18F]-choline derivates may be helpful in the clinical setting for optimization of individualized treatment. PMID:23420146

  8. Constraint Conflict: The Source of an Unusual Error Pattern

    ERIC Educational Resources Information Center

    Dinnsen, Daniel A.; Farris, Ashley W.

    2006-01-01

    Certain phonological error patterns have been judged to be "unusual" or "idiosyncratic", posing a number of theoretical and clinical problems. This paper reconsiders an especially challenging case of an unusual error pattern documented by Leonard and Brown (1984). T (age 3;8) replaced all word-final consonants (except for labial stops) with [s]…

  9. Semi-Supervised Adapted HMMs for Unusual Event Detection

    Microsoft Academic Search

    Dong Zhang; Daniel Gatica-perez; Samy Bengio; Iain Mccowan

    2005-01-01

    We address the problem of temporal unusual event de- tection. Unusual events are characterized by a number of features (rarity, unexpectedness, and relevance) that limit the application of traditional supervised model-based ap- proaches. We propose a semi-supervised adapted Hidden Markov Model (HMM) framework, in which usual event models are first learned from a large amount of (commonly available) training data,

  10. Drosophila ananassae: A species characterized by several unusual genetic features

    Microsoft Academic Search

    B. N. Singh

    2000-01-01

    Drosophila ananassae Doleschall is a cosmopolitan and domestic species. It occupies a unique status among the Drosophila species due to certain peculiarities in its ge- netic behaviour and is of common occurrence in India. The most unusual feature of this species is spontaneous male meiotic recombination in appreciable frequency. The other unusual features are varied chromosomal polymorphism, high mutability, Y-4

  11. Finding overlapping images Finding overlapping images

    E-print Network

    Giger, Christine

    Finding overlapping images #12;Finding overlapping images · Close-range image sets are often unordered · no "natural" order of acquisition · no systematic block structure · How to find images to match? · obvious idea: try all pairs - does not scale to big projects · 1'000 images 499'500 pairs · 10'000 images

  12. CT-assisted metrology for manufacturing applications

    Microsoft Academic Search

    Robert N. Yancey; Dennis S. Eliasen; Roosevelt Gibson; Robert Dzugan

    1996-01-01

    Computed tomography (CT) has been shown to be an excellent nondestructive evaluation tool for measuring internal and external dimensions of manufactured components. Recent advances in CT-based metrology allow for CT data to be processed efficiently to produce full 3D models of scanned parts. This paper will talk about a number of applications for this technology including linking CT with rapid

  13. Spiral (helical) CT of the renal vasculature

    Microsoft Academic Search

    Geoffrey D Rubin

    1996-01-01

    The renal arteries are among the most challenging of the major aortic branches to image with spiral CT. Optimization of CT acquisition parameters is critical to creating diagnostic renal CT angiograms. When careful attention is paid to prescribing these examinations, renal CT angiography can be a very useful, noninvasive alternative to conventional angiography for the assessment of renal artery stenosis,

  14. An unusual abscess formation in the masticator space after acupressure massage: a case report.

    PubMed

    Ko, In-Chan; Yoon, Kyu-Ho; Park, Kwan-Soo; Cheong, Jeong-Kwon; Bae, Jung-Ho; Lee, Kwon-Woo; Chin, Young-Jai

    2015-02-01

    Clinical features of masticator-space abscess (MSA) are very similar to those of parotitis or temporomandibular disorder (TMD), making early differential diagnosis difficult. Local causes of MSA include nerve block anesthesia, infection after tooth extraction, and trauma to the temporomandibular joint (TMJ); the systemic cause is immunodeficiency. Odontogenic causes account for most etiologies, but there are also unusual causes of MSA. A 66-year-old male patient visited the emergency room (ER) presenting with left-side TMJ pain three days after receiving an acupressure massage. He was tentatively diagnosed with conventional post-trauma TMD and discharged with medication. However, the patient returned to the ER with increased pain. At this time, his TMD diagnosis was confirmed. He made a third visit to the ER during which facial computed tomographic (CT) images were taken. CT readings identified an abscess or hematoma in the left masticator space. After hospitalizing the patient, needle aspiration confirmed pus in the infratemporal and temporal fossa. Antibiotics were administered, and the abscess was drained through an incision made by the attending physician. The patient's symptoms decreased, and he was discharged. PMID:25741470

  15. An unusual abscess formation in the masticator space after acupressure massage: a case report

    PubMed Central

    Ko, In-Chan; Yoon, Kyu-Ho; Cheong, Jeong-Kwon; Bae, Jung-Ho; Lee, Kwon-Woo; Chin, Young-Jai

    2015-01-01

    Clinical features of masticator-space abscess (MSA) are very similar to those of parotitis or temporomandibular disorder (TMD), making early differential diagnosis difficult. Local causes of MSA include nerve block anesthesia, infection after tooth extraction, and trauma to the temporomandibular joint (TMJ); the systemic cause is immunodeficiency. Odontogenic causes account for most etiologies, but there are also unusual causes of MSA. A 66-year-old male patient visited the emergency room (ER) presenting with left-side TMJ pain three days after receiving an acupressure massage. He was tentatively diagnosed with conventional post-trauma TMD and discharged with medication. However, the patient returned to the ER with increased pain. At this time, his TMD diagnosis was confirmed. He made a third visit to the ER during which facial computed tomographic (CT) images were taken. CT readings identified an abscess or hematoma in the left masticator space. After hospitalizing the patient, needle aspiration confirmed pus in the infratemporal and temporal fossa. Antibiotics were administered, and the abscess was drained through an incision made by the attending physician. The patient's symptoms decreased, and he was discharged. PMID:25741470

  16. Children's (Pediatric) CT (Computed Tomography)

    MedlinePLUS

    ... detailed images of many types of tissue as well as the lungs, bones, and blood vessels. CT examinations are fast and simple; in emergency cases, they can reveal internal injuries and bleeding quickly ...

  17. CT Demonstration of Caput Medusae

    NSDL National Science Digital Library

    Edward Weber (Indiana University School of Medicine School of Medicine)

    2009-07-27

    This article provides a method to demonstrate the anatomy and physiology of advanced liver disease (specifically the portosystemic shunt associated with portal hypertension). CT images are used to emphasize the science.

  18. CT Demonstration of Caput Medusae

    ERIC Educational Resources Information Center

    Weber, Edward C.; Vilensky, Joel A.

    2009-01-01

    Maximum intensity and volume rendered CT displays of caput medusae are provided to demonstrate both the anatomy and physiology of this portosystemic shunt associated with portal hypertension. (Contains 2 figures.)

  19. Children, CT Scan and Radiation.

    PubMed

    Bajoghli, Morteza; Bajoghli, Farshad; Tayari, Nazila; Rouzbahani, Reza

    2010-01-01

    Children are more sensitive to radiation than adults. Computerized tomography (CT) consists of 25 % of all medical imaging. It was estimated that more than 2% of all carcinomas in the USA are due to CT scans. There is an ongoing focus on the reduction of CT scan radiation dose. Awareness about risk-benefits of CT has increased. Reduction of radiological exam is an important issue because the accumulation effects of radiation can be hazardous. In addition, proper protocol should be followed for diagnostic procedures of ionization radiation and computerized tomography. Effective radiation dose should range from 0.8 to 10.5 millisievert. The same protocol should be followed in different hospitals as well. Basic principles of radiation protection should be monitored. As much as possible, both technician and radiologist must be present during computerized tomography for children, and MRI and ultrasound should be replaced if possible. PMID:21566776

  20. CT of the neonatal head.

    PubMed

    Mohan, S; Rogan, E A; Batty, R; Raghavan, A; Whitby, E H; Hart, A R; Connolly, D J A

    2013-11-01

    Computed tomography (CT) is used less often than other techniques on neonatal units. However, in the acute setting, CT can be invaluable in diagnosing or excluding potentially life-threatening conditions and guiding initial management in neonates. Common indications for scanning include trauma, suspected non-accidental injury, infection, or an acute hypoxic or metabolic event. The aim of this review is to provide an overview of the normal neonatal head at CT and compare this to the common pathological abnormalities. Several key features of each condition will be highlighted. It is important to note that some pathological conditions can have overlapping features at CT and, therefore, the clinical history and additional investigations are also of key importance in determining the diagnosis. PMID:23937824

  1. CT evaluation of urinary lithiasis.

    PubMed

    Kenney, Philip J

    2003-09-01

    Unenhanced CT has been demonstrated to be the most accurate and efficient diagnostic imaging means to evaluate urinary lithiasis, with capability of directing management, and has become well accepted by radiologists, urologists, and emergency department physicians such that it is now the standard of practice. It is the duty of the radiologist to be aware of proper technique and the details of interpretation. The radiologist also has a duty to be aware of the limitations of unenhanced CT for detection and evaluation of various nonstone disorders, particularly with poor patient selection, and to extend the examination if appropriate. Controversies and future developments include cost containment with care for the selection of patients. Further attempts to reduce radiation exposure should be made. Optimal CT technique is not needed in general merely to detect urinary lithiasis. A consensus should be developed regarding use of CT in pregnant patients. Further improvements in the digital scout view would be useful for following patients. PMID:14521205

  2. Multiplanar CT of the spine

    SciTech Connect

    Rothman, S.L.G.; Glenn, W.V. Jr.

    1986-01-01

    This is an illustrated text on computed tomography (CT) of the lumbar spine with an emphasis on the role and value of multiplanar imaging for helping determine diagnoses. The book has adequate discussion of scanning techniques for the different regions, interpretations of various abnormalities, degenerative disk disease, and different diagnoses. There is a 50-page chapter on detailed sectional anatomy of the spine and useful chapters on the postoperative spine and the planning and performing of spinal surgery with CT multiplanar reconstruction. There are comprehensive chapters on spinal tumors and trauma. The final two chapters of the book are devoted to CT image processing using digital networks and CT applications of medical computer graphics.

  3. Multiplanar CT of the spine

    SciTech Connect

    Rothman, S.L.G.; Glenn, W.V.

    1985-01-01

    This book contains 16 chapters. Some of the topics are: CT of the Sacrum, The Postoperative Spine, Film Organizations and Case Reporting, Degeneration and Disc Disease of the Intervertebral Joint, Lumbar Spinal Stenosis, and Cervical and Thoracic Spine.

  4. Nonlesions, unusual cell types, and postmortem artifacts in the central nervous system of domestic animals.

    PubMed

    Wohlsein, P; Deschl, U; Baumgärtner, W

    2013-01-01

    In the central nervous system (CNS) of domestic animals, numerous specialized normal structures, unusual cell types, findings of uncertain or no significance, artifacts, and various postmortem alterations can be observed. They may cause confusion for inexperienced pathologists and those not specialized in neuropathology, leading to misinterpretations and wrong diagnoses. Alternatively, changes may mask underlying neuropathological processes. "Specialized structures" comprising the hippocampus and the circumventricular organs, including the vascular organ of the lamina terminalis, subfornical organ, subcommissural organ, pineal gland, median eminence/neurohypophyseal complex, choroid plexus, and area postrema, are displayed. Unusual cell types, including cerebellar external germinal cells, CNS progenitor cells, and Kolmer cells, are presented. In addition, some newly recognized cell types as of yet incompletely understood significance and functionality, such as synantocytes and aldynoglia, are introduced and described. Unusual reactive astrocytes in cats, central chromatolysis, neuronal vacuolation, spheroids, spongiosis, satellitosis, melanosis, neuromelanin, lipofuscin, polyglucosan bodies, and psammoma bodies may represent incidental findings of uncertain or no significance and should not be confused with significant microscopic changes. Auto- and heterolysis as well as handling and histotechnological processing may cause postmortem morphological changes of the CNS, including vacuolization, cerebellar conglutination, dark neurons, Buscaino bodies, freezing, and shrinkage artifacts, all of which have to be differentiated from genuine lesions. Postmortem invasion of micro-organisms should not be confused with intravital infections. Awareness of these different changes and their recognition are a prerequisite for identifying genuine lesions and may help to formulate a professional morphological and etiological diagnosis. PMID:22692622

  5. RamCT Training & Support RamCT Clear Java Files ACNS/Colorado State University

    E-print Network

    Rutledge, Steven

    RamCT Training & Support RamCT Clear Java Files ACNS/Colorado State University © May 2013 RamCT Delete Temporary Java Files The first time a user uploads files in RamCT or the first time they use the Chat tool, they will likely see a Java security certificate window. OK To Trust RamCT Security

  6. Subdiaphragmatic Gallstone Mimicking Hepatic Malignancy on FDG PET/CT.

    PubMed

    Kim, Jisoo; Siegel, Alan; Yen, Stephanie P; Seltzer, Marc

    2015-04-01

    A 70-year-old man underwent an FDG PET/CT for a possible primary liver malignancy or metastasis found on an abdominal MRI obtained as part of a workup for intermittent abdominal pain. The MRI showed an enhancing lesion at the dome of the right lobe of the liver. The lesion was FDG avid with a discrete central calcification. In conjunction with the patient's history of laparoscopic cholecystectomy 1 year prior, the findings were consistent with inflammation around a migrated subdiaphragmatic gallstone. One month after the scan, a CT-guided percutaneous biopsy of this lesion revealed chronic inflammatory cells with no evidence of malignancy. PMID:25608158

  7. CT of Hepatic Sarcoidosis: Small Nodular Lesions Simulating Metastatic Disease

    PubMed Central

    Ufuk, Furkan; Herek, Duygu

    2015-01-01

    Summary Background Sarcoidosis is a multisystemic inflammatory disease of unknown origin. The lymphoid system and the lungs are the most commonly involved organs. The frequency of signs or symptoms of hepatic involvement is very low. Case Report We present a case of symptomatic granulomatous liver disease secondary to sarcoidosis, mimicking a metastatic disease on ultrasonography and CT. Conclusions Hepatic involvement in sarcoidosis might be a perplexing diagnostic problem. The decisive CT finding with respect to the differential diagnosis was the absence of a mass effect and intact vascular architecture around the lesions.

  8. Finding Canadian Government Pubs.

    E-print Network

    Haykin, Simon

    Finding Canadian Government Pubs. Econ 773 Peggy Findlay Reference Librarian Mills Research Help 2 Objectives Finding print Canadian government publications Electronic Canadian government publications Census Information/ Survey Data #12;Finding Canadian Documents ­ Econ 773 Finding Print Canadian Government

  9. CT volumetry of the skeletal tissues

    SciTech Connect

    Brindle, James M.; Alexandre Trindade, A.; Pichardo, Jose C.; Myers, Scott L.; Shah, Amish P.; Bolch, Wesley E. [Department of Nuclear and Radiological Engineering, University of Florida, Gainesville, Florida 32611 (United States); Department of Statistics, University of Florida, Gainesville, Florida 32611 (United States); Department of Nuclear and Radiological Engineering, University of Florida, Gainesville, Florida 32611 (United States); Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, Florida 32611 (United States); MD Anderson Cancer Center Orlando, Orlando, Florida 32806 (United States); Department of Nuclear and Radiological and Department of Biomedical Engineering, University of Florida, Gainesville, Florida 32611 (United States)

    2006-10-15

    Computed tomography (CT) is an important and widely used modality in the diagnosis and treatment of various cancers. In the field of molecular radiotherapy, the use of spongiosa volume (combined tissues of the bone marrow and bone trabeculae) has been suggested as a means to improve the patient-specificity of bone marrow dose estimates. The noninvasive estimation of an organ volume comes with some degree of error or variation from the true organ volume. The present study explores the ability to obtain estimates of spongiosa volume or its surrogate via manual image segmentation. The variation among different segmentation raters was explored and found not to be statistically significant (p value >0.05). Accuracy was assessed by having several raters manually segment a polyvinyl chloride (PVC) pipe with known volumes. Segmentation of the outer region of the PVC pipe resulted in mean percent errors as great as 15% while segmentation of the pipe's inner region resulted in mean percent errors within {approx}5%. Differences between volumes estimated with the high-resolution CT data set (typical of ex vivo skeletal scans) and the low-resolution CT data set (typical of in vivo skeletal scans) were also explored using both patient CT images and a PVC pipe phantom. While a statistically significant difference (p value <0.002) between the high-resolution and low-resolution data sets was observed with excised femoral heads obtained following total hip arthroplasty, the mean difference between high-resolution and low-resolution data sets was found to be only 1.24 and 2.18 cm{sup 3} for spongiosa and cortical bone, respectively. With respect to differences observed with the PVC pipe, the variation between the high-resolution and low-resolution mean percent errors was a high as {approx}20% for the outer region volume estimates and only as high as {approx}6% for the inner region volume estimates. The findings from this study suggest that manual segmentation is a reasonably accurate and reliable means for the in vivo estimation of spongiosa volume. This work also provides a foundation for future studies where spongiosa volumes are estimated by various raters in more comprehensive CT data sets.

  10. Unusual case of a lung abscess

    PubMed Central

    Musa, Duduzile; Godbole, Gauri; Chiodini, Peter L; Phillips, Russell

    2013-01-01

    A 56-year-old Caucasian lady presented with a short history of pleuritic chest pain on the background of a 2-month history of fever, chills, 10-kg weight loss and cough with brown sputum after a laparoscopic cholecystectomy. She had persistent eosinophilia and was diagnosed with a lung abscess as seen on chest x-ray. She did not respond to standard intravenous broad spectrum antibacterial medication and her chest CT scan showed a moderate pleural collection in continuity with the abscess. She also underwent bronchoscopy, the microscopy of the bronchial washings revealing eggs of the trematode Fasciola. The bacterial and fungal cultures of the washings were sterile. She had visited Turkey in the previous year but did not remember consuming any watercress or aquatic plants. She was successfully treated with two doses of the antiparasitic agent triclabendazole. Ectopic Fasciola can be a rare cause of a lung abscess. PMID:23595175

  11. Scientists find mutation driving pediatric brain tumors

    Cancer.gov

    A type of low-grade but sometimes lethal brain tumor in children has been found in many cases to contain an unusual mutation that may help to classify, diagnose and guide the treatment of the tumors, report scientists at Dana-Farber Cancer Institute. The researchers led a study of pediatric low-grade gliomas, samples of which were collected through an international consortium organized by brain tumor specialists at Dana-Farber/Children’s Hospital Cancer Center. Their findings are being published online by the Proceedings of the National Academy of Sciences (PNAS) the week of April 29.

  12. Experimental investigation of magnetically induced unusual emission of light from a ferrodispersion.

    PubMed

    Mehta, R V; Patel, Rajesh; Chudasama, Bhupendra; Upadhyay, R V

    2008-09-01

    An unusual emission of light is observed when a coherent light beam is passed through a mixture of a magnetorheological suspension and a ferrofluid that is subjected to a critical magnetic field. When first the incident light is removed and then the field is switched off, a flash of light is observed. In this Letter certain characteristics of this unusual emission are reported. Our findings suggest that a part of the incident light energy is magnetically trapped within the medium. Upon removal of the field, the same is released. Several physical phenomena that may give rise to such emission are discussed. The magnetically tunable emission will be useful to develop photonic devices. PMID:18758587

  13. Investigation of two unusual eclipsing binaries, FN Cam and AG Vir

    NASA Astrophysics Data System (ADS)

    Avvakumova, Ekaterina; Malkov, Oleg; Popov, Alexander

    2014-09-01

    Eclipsing binaries represent an invaluable resource for the determination of the fundamental properties of stars and allow us to check theoretical assumptions about stellar evolution. For the latter, we need to know evolutionary types for a large set of binaries. To estimate evolutionary types, we have developed a method for the classification of eclipsing variables based on a restricted set of their observational parameters (Avvakumova et al., AN, 2013). The method also allows us to find eclipsing variables with unusual sets of observational parameters. Some systems can be rare examples of unusual evolutionary stages. In our paper, two systems with doubtful evolutionary states will be discussed. We will present the results of a photometric and spectral investigation of both binaries.

  14. CT-Based Interstitial HDR Brachytherapy

    Microsoft Academic Search

    Christos Kolotas; Dimos Baltas; Nikolaos Zamboglou

    1999-01-01

    Purpose: Development, application and evaluation of a CT-guided implantation technique and a fully CT-based treatment planning procedure for brachytherapy. Methods and Materials: A brachytherapy procedure based on CT-guided implantation technique and CT-based treatment planning has been developed and clinical evaluated. For this purpose a software system (PROMETHEUS) for the 3D reconstruction of brachytherapy catheters and patient anatomy using only CT

  15. Differential diagnosis between secondary and tertiary hyperparathyroidism in a case of a giant-cell and brown tumor containing mass. Findings by (99m)Tc-MDP, (18)F-FDG PET/CT and (99m)Tc-MIBI scans.

    PubMed

    Gedik, Gonca Kara; Ata, Ozlem; Karabagli, Pinar; Sari, Oktay

    2014-01-01

    Brown tumor is one of the skeletal manifestations of hyperparathyroidism. It is a benign but locally aggressive bone lesion and its differential diagnosis with giant cell containing skeletal tumors or metastases may be complicated. We present a male patient with chronic renal failure who was initially misdiagnosed as having a giant-cell rich neoplasm of bone in his right thumb. Diffusely increased fluorine-18 fluorodeoxyglucose ((18)F-FDG) uptake in the axial and appendicular skeleton and multiple (18)F-FDG avid lytic lesions suggesting multiple metastases were observed on the (18)F-FDG positron emission tomography/computed tomography (PET/CT) scan. On the usual technetium-99m methylene diphosphonate ((99m)Tc-MDP) bone scan we noticed diffusely increased uptake in the skeleton and two focuses with very much increased uptake, which suggested a metabolic bone disease rather than a multiple metastatic giant cell tumor or bone metastases. Additional investigation documentated increased levels of parathyroid hormone. Parathyroid hyperplasia was finally diagnosed with (99m)Tc-methoxyisobutylisonitrile (MIBI) parathyroid scintigraphy. Fluorine-18-FDG avid lytic lesions were attributed to hyerparathyroidism associated brown tumors instead of multiple metastases. In conclusion, we present a patient with chronic renal insufficiency, who suffered from secondary and later from tertiary HPT with polyostotic brown tumors, which were best shown by the (18)F-FDG PET/CT than by the (99m)Tc-MDP or the (99m)Tc-MIBI scans. PMID:25397627

  16. An unusual congenital facial anomaly: erectile proboscis-like structure.

    PubMed

    Mutaf, Mehmet; Isik, Da?han; Büyükgüral, Berker

    2006-07-01

    We report a 3-week-old male infant with an unusual congenital facial anomaly, which is characterized by a proboscis-like erectile structure arising from the right malar region. Although it is a tubular structure resembling the proboscis lateralis, this case was more likely to be a new congenital anomaly because of the following reasons: (1) in contrast with the proboscis lateralis, which originates from the medial portion of the orbital roof, the structure was located at the right malar region in our case; (2) although it was soft and freely dangling on the face, this proboscis-like structure was strongly erectile, with contraction of the orbicularis oculi muscle when the infant cried; (3) histopathological examination revealed that the structure was composed by normal fibroadipose tissue and striated muscle covered with a healthy skin and subcutaneous tissue. In contrast with histopathological characteristics of a proboscis lateralis, there was neither osteocartilaginous tissue nor mucosa in the structure. Although it is a typical finding for a proboscis lateralis, no lumen was found in the presented anomaly. Because of these unique characteristics, which remarkably differ from previously reported facial anomalies, we thought this case worth reporting. A literature review revealed that no similar case has been reported in the literature. PMID:16799319

  17. STEREO- Wind Radio Positioning of an Unusually Slow Drifting Event

    NASA Astrophysics Data System (ADS)

    Martínez-Oliveros, J. C.; Raftery, C.; Bain, H.; Liu, Y.; Pulupa, M.; Saint-Hilaire, P.; Higgins, P.; Krupar, V.; Krucker, Säm; Bale, S. D.

    2015-03-01

    On 13 March 2010 an unusually long-duration event was observed by radio spectrographs onboard the STEREO-B and Wind spacecraft. The event started at about 13:00 UT and ended at approximately 06:00 UT on 14 March. The event presents itself as slow drifting, quasi-continuous emission in a very narrow frequency interval, with an apparent frequency drift from about 625 kHz to approximately 425 kHz. Using the Leblanc, Dulk, and Bougeret ( Solar Phys. 183, 165, 1998) interplanetary density model, we determined that the drift velocities of the radio source are ? 33 km s-1 and ? 52 km s-1 for 0.2 and 0.5 times the densities of Leblanc model, respectively, with a normalization density of 7.2 cm-3 at 1 AU and assuming harmonic emission. A joint analysis of the radio direction-finding data, coronograph white-light observations and modeling revealed that the radio sources appear to be located in interaction regions with relatively high density and slow solar wind speed.

  18. CT evaluation of complications of abdominal aortic surgery

    SciTech Connect

    Mark, A.; Moss, A.A.; Lusby, R.; Kaiser, J.A.

    1982-11-01

    The authors conducted a retrospective analysis of the CT findings in 29 consecutive patients being studied to detect complications of aortofemoral bypass surgery. Presenting symptoms included fever in 22 (76%), gastrointestinal bleeding in 2 (7%), a pulsating mass in 3 (10%), jaundice in 1 (3%), and back pain in 1 (3%). The complications observed most frequently were groin infection in 7 (24%), abdominal perigraft abscess in 11 (38%), pseudoaneurysm in 6 (21%), aorto-enteric fistula in 3 (10%), and lymphocystic hematoma in 3 (10%). There were no false negatives, and overall accuracy and sensitivity of CT in detecting complications was 100%. The authors recommend that CT be performed prior to angiography or surgery whenever an abscess, pseudoaneurysm, or aorto-enteric fistula is suspected.

  19. Unusual Inorganic Biradicals: A Theoretical Analysis

    SciTech Connect

    Miliordos, Evangelos; Ruedenberg, Klaus; Xantheas, Sotiris S.

    2013-05-27

    Triatomic ions in the series FX2+, where X = O, S, Se, Te and Po are the terminal atoms, exhibit unusually high biradical characters (0.76 < B < 0.92), as measured from the analysis of Multi-Reference Configuration Interaction (MRCI) wavefunctions. Candidates in this series have the largest biradical character among the homologous, 18 valence electron CX22-, NX2?, X3 and OX2 (X = O, S, Se, Te and Po) systems. In the same scale the biradical character of ozone (O3) is just 0.19, whereas that of trimethylenemethane [C(CH2)3] is 0.97 (B=1 for an "ideal" biradical). For the 24 electron XO2 series, consisting of molecules with two oxygen atoms and a moiety X that is isoelectronic to oxygen, i.e. X= CH2, NH, O, F+, the singlet (S) state is lower than the triplet (T) one and the S-T splitting as well the barrier between their "open" and "ring" configurations was found to depend linearly with the inverse of the biradical character.

  20. Two unusual pediatric cases of dilutional hyponatremia.

    PubMed

    Boetzkes, Sanne; Van Hoeck, Koen; Verbrugghe, Walter; Ramet, José; Wojciechowski, Marek; Jorens, Philippe G

    2010-07-01

    Dilutional hyponatremia, although not uncommon, is an underestimated problem in the pediatric population. In most cases, it results from excessive hydration or water retention, also described as the so-called water intoxication. One of the most known causes is the use of desmopressin in enuretic children. This drug enhances the free water reabsorption in the renal collecting ducts. The addition of the anticholinergic agent oxybutynin aggravated the condition by causing a dry mouth with excessive thirst and water intake in our first case. Dietary water overconsumption, either voluntary or involuntary, is a phenomenon seen in formula-fed babies. But in our second case, a game involving forced ingestion of large amounts of water had serious consequences including hyponatremia-related coma. An effort should therefore be made to inform caretakers about the risks of these games. These cases, provoked by rather unusual and peculiar causes, illustrate again that electrolytes and especially serum [Na(+)] are key points to be determined in a child with diminished consciousness. Moreover, an accurate history including the intake of medication and dietary information should be made. PMID:20622630

  1. Unusual Features of Drell-Yan Diffraction

    E-print Network

    B. Z. Kopeliovich; I. K. Potashnikova; I. Schmidt; A. B. Tarasov

    2006-12-25

    The cross section of the diffractive Drell-Yan (DY) process, pp->(l-lbar X)p, where the system (l-lbar X) is separated by a large rapidity gap from the recoil proton, is calculated in the light-cone dipole approach. This process reveals unusual features, quite different from what is known for diffractive DIS and nonabelian radiation: (i) the diffractive radiation of a heavy dilepton by a quark vanishes in the forward direction; (ii) the diffractive production of a dilepton is controlled by the large hadronic radius; (iii) in contrast with DIS where diffraction is predominantly soft, the diffractive DY reaction is semihard-semisoft; (iv) as a result of the saturated shape of the dipole cross section, the fraction of diffractive DY events steeply falls with energy, but rises as function of the hard scale. These features are common for other abelian bremsstrahlung processes (higgsstrahlung, Z-strahlung, etc.). Measurements of diffractive DY processes at modern colliders would be a sensitive probe for the shape of the dipole cross section at large separations.

  2. An Unusual Stellar Death on Christmas Day

    NASA Technical Reports Server (NTRS)

    Thone, C. C.; de Ugarte Postigo, A.; Fryer, C. L.; Page, K. L.; Gorosabel, J.; Aloy, M. A.; Perley, D. A.; Kouveliotou, C.; Janka, H. T.; Mimica, P.; Racusin, J. L.; Krimm, H.; Cummings, J.; Oates, S. R.; Holland, S. T.; Siegel, M. H.; De Pasquale, M.; Sonbas, E.; Im, M.; Park, W. K.; Kann, D. A.; Guziy, S.; Hernandez Garcia, L.; Llorente, A.; Bundy, K.

    2011-01-01

    Long Gamma-Ray Bursts (GRBs) are the most dramatic examples of massive stellar deaths, usually associated with supernovae. They release ultra-relativistic jets producing non-thermal emission through synchrotron radiation as they interact with the surrounding medium. Here we report observations of the peculiar GRB 101225A (the "Christmas burst"). Its gamma-ray emission was exceptionally long and followed by a bright X-ray transient with a hot thermal component and an unusual optical couuterpart. During the first 10 days, the optical emission evolved as an expanding, cooling blackbody after which an additional component, consistent with a faint supernova, emerged. We determine its distance to 1.6 Gpc by fitting the spectral-energy distribution and light curve of the optical emission with a GRB-supernova template. Deep optical observations may have revealed a faint, unresolved host galaxy. Our proposed progenitor is a helium star-neutron star merger that underwent a common envelope phase expelling its hydrogen envelope. The resulting explosion created a GRB-like jet which gets thermalized by interacting with the dense, previously ejected material and thus creating the observed black-body, until finally the emission from the supernova dominated. An alternative explanation is a minor body falling onto a neutron star io the Galaxy

  3. Unusual Superconducting transition in Topological Insulators

    NASA Astrophysics Data System (ADS)

    Li, Dingping; Rosenstein, B.; Shapiro, B. Ya; Shapiro, I.

    2014-12-01

    Superconducting transition generally belongs to the U (1) class of phase transitions. However it was pointed out long time ago that if the normal state dispersion relation is "ultrarelativistic" the transition is unusual: even the mean field critical exponents are different from the standard ones leading to a number of observable effects. Attempts to experimentally discover such a system included chiral condensate in graphene. Recently it was found that some 3D topological insulators (that possess the ultrarelativistic metal on its surface) exhibit surface superconductivity.Starting from microscopic TI Hamiltonian with local four fermions interaction, we calculated the total set of the Gor'kov equations allowing to build the Ginzburg – Landau (GL) theory including the magnetic field effects. It was shown that the GL equations reflect the novel chiral universality class, very different from original GL equations. For example the temperature dependence of the coherence length diverges at the critical temperature with critical exponent v = -1 in rather than customary v = -1/2, magnetization near the upper critical magnetic field is quadratic as a function of deviation from the upper critical field while the Superfluid density is ?2 = (Tc ? T)?, ? = 2, not ? = 1.

  4. Unusual features of Drell-Yan diffraction

    SciTech Connect

    Kopeliovich, B. Z. [Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile); Institut fuer Theoretische Physik der Universitaet, Philosophenweg 19, 69120 Heidelberg (Germany); Joint Institute for Nuclear Research, Dubna (Russian Federation); Potashnikova, I. K. [Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile); Joint Institute for Nuclear Research, Dubna (Russian Federation); Schmidt, Ivan [Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile); Tarasov, A. V. [Institut fuer Theoretische Physik der Universitaet, Philosophenweg 19, 69120 Heidelberg (Germany); Joint Institute for Nuclear Research, Dubna (Russian Federation)

    2006-12-01

    The cross section of the diffractive Drell-Yan (DY) process, pp{yields}llXp, where the system llX is separated by a large rapidity gap from the recoil proton, is calculated in the light-cone dipole approach. This process reveals unusual features, quite different from what is known for diffractive deeply inelastic scattering (DIS) and non-Abelian radiation: (i) the diffractive radiation of a heavy dilepton by a quark vanishes in the forward direction; (ii) the diffractive production of a dilepton is controlled by the large hadronic radius; (iii) in contrast with DIS where diffraction is predominantly soft, the diffractive DY reaction is semihard-semisoft; (iv) as a result of the saturated shape of the dipole cross section, the fraction of diffractive DY events steeply falls with energy but rises as a function of the hard scale. These features are common for other Abelian bremsstrahlung processes (higgsstrahlung, Z-strahlung, etc.). Measurements of diffractive DY processes at modern colliders would be a sensitive probe for the shape of the dipole cross section at large separations.

  5. An unusual stellar death on Christmas Day

    E-print Network

    Thöne, C C; Fryer, C L; Page, K L; Gorosabel, J; Perley, D A; Kouveliotou, C; Janka, H T; Aloy, M A; Mimica, P; Racusin, J L; Krimm, H; Cummings, J; Oates, S R; Holland, S T; Siegel, M H; De Pasquale, M; Sonbas, E; Im, M; Park, W -K; Kann, D A; Guziy, S; Garcia, L Hernandez; Bundy, K; Castro-Tirado, A J; Choi, C; Jeong, H; Korhonen, H; Kubanek, P; Lim, J; Llorente, A; Moskvitin, A; Darias, T Muńoz; Pak, S; Parrish, I

    2011-01-01

    Massive stars can end their lives in many different ways. Long Gamma-Ray Bursts (GRBs) are the most dramatic examples, releasing ultra-relativistic ejecta that produce non-thermal emission when interacting with the surrounding medium (Zhang et al. 2004). Usually, those events are accompanied by a supernova (SN) (Woosley et al. 2006). In a few low-redshift GRB-SNe we could observe the actual breakout of the shock front from the surface of the star (Campana et al. 2006). Here we present GRB 101225A, a very peculiar event at a distance of 1.6 Gpc. A bright X-ray transient with a thermal component and an unusual optical counterpart followed an exceptionally long gamma-ray event. During the first 10 days, the optical emission evolved as an expanding, cooling blackbody with a large initial radius, after which a faint SN was observed. The absence of a normal GRB afterglow implies that some dense material, likely ejected by the progenitor star, completely thermalized the high-energy emission. A possible progenitor is...

  6. Closed perforation of the small bowel secondary to a phytobezoar: imaging findings

    Microsoft Academic Search

    Suna Özhan Oktar; Cem Yücel; Esra Aslan; Hakan Özdemir

    Small bowel perforation secondary to phytobezoars is a rare clinical entity, which is not well-documented in the radiological literature. Sonographic and com- puted tomography (CT) findings of a case of closed small bowel perforation secondary to phytobezoars in a patient with previous gastric surgery are present- ed. Both abdominal ultrasound and CT examinations revealed a collection containing air at the

  7. Pulmonary function-morphologic relationships assessed by SPECT-CT fusion images.

    PubMed

    Suga, Kazuyoshi

    2012-05-01

    Pulmonary single photon emission computed tomography-computed tomography (SPECT-CT) fusion images provide objective and comprehensive assessment of pulmonary function and morphology relationships at cross-sectional lungs. This article reviewed the noteworthy findings of lung pathophysiology in wide-spectral lung disorders, which have been revealed on SPECT-CT fusion images in 8 years of experience. The fusion images confirmed the fundamental pathophysiologic appearance of lung low CT attenuation caused by airway obstruction-induced hypoxic vasoconstriction and that caused by direct pulmonary arterial obstruction as in acute pulmonary thromboembolism (PTE). The fusion images showed better correlation of lung perfusion distribution with lung CT attenuation changes at lung mosaic CT attenuation (MCA) compared with regional ventilation in the wide-spectral lung disorders, indicating that lung heterogeneous perfusion distribution may be a dominant mechanism of MCA on CT. SPECT-CT angiography fusion images revealed occasional dissociation between lung perfusion defects and intravascular clots in acute PTE, indicating the importance of assessment of actual effect of intravascular colts on peripheral lung perfusion. Perfusion SPECT-CT fusion images revealed the characteristic and preferential location of pulmonary infarction in acute PTE. The fusion images showed occasional unexpected perfusion defects in normal lung areas on CT in chronic obstructive pulmonary diseases and interstitial lung diseases, indicating the ability of perfusion SPECT superior to CT for detection of mild lesions in these disorders. The fusion images showed frequent "steal phenomenon"-induced perfusion defects extending to the surrounding normal lung of arteriovenous fistulas and those at normal lungs on CT in hepatopulmonary syndrome. Comprehensive assessment of lung function-CT morphology on fusion images will lead to more profound understanding of lung pathophysiology in wide-spectral lung disorders. PMID:22350957

  8. Metrology with ?CT: precision challenge

    NASA Astrophysics Data System (ADS)

    Suppes, Alexander; Neuser, Eberhard

    2008-08-01

    Over the last years computed tomography (CT) with conventional x-ray sources has evolved from imaging method in medicine to a well established technology for industrial applications in the field of material science, microelectronics, geology, etc. By using modern microfocus and nanofocus® X-ray tubes, parts can be scanned with sub-micrometer resolutions. Currently, micro-CT is used more and more as a technology for metrological applications. Especially if complex parts with hidden or difficult accessible surfaces have to be measured, CT offers big advantages comparing with conventional tactile or optical coordinate measuring machines (CMMs): high density of measurement points and fast capturing of the complete sample's geometry. When using this modern technology the question arises how precise a CT based CMM can measure in comparison to conventional CMMs? To characterize the metrological capabilities of a tactile or optical CMM, internationally standardized characteristics like length measurement error and probing error are used. To increase the acceptance of CT as a metrological method, the definition and usage of these parameters is important. In this paper, an overview of the process chain in CT based metrology will be given and metrological characteristics will be described. With the help of a special material standard designed and calibrated by PTB-National Metrology Institute of Germany-the influence of methods for beam hardening correction and for surface extraction on the metrological characteristics will be analyzed. It will be shown that with modern micro-CT systems length measurement error of less than 1?m for an object diameter of 20 mm can be reached.

  9. Cardiac cone-beam CT

    SciTech Connect

    Manzke, Robert [University of London (King's College) (United Kingdom)]. E-mail: robert.manzke@philips.com

    2005-10-15

    This doctoral thesis addresses imaging of the heart with retrospectively gated helical cone-beam computed tomography (CT). A thorough review of the CT reconstruction literature is presented in combination with a historic overview of cardiac CT imaging and a brief introduction to other cardiac imaging modalities. The thesis includes a comprehensive chapter about the theory of CT reconstruction, familiarizing the reader with the problem of cone-beam reconstruction. The anatomic and dynamic properties of the heart are outlined and techniques to derive the gating information are reviewed. With the extended cardiac reconstruction (ECR) framework, a new approach is presented for the heart-rate-adaptive gated helical cardiac cone-beam CT reconstruction. Reconstruction assessment criteria such as the temporal resolution, the homogeneity in terms of the cardiac phase, and the smoothness at cycle-to-cycle transitions are developed. Several reconstruction optimization approaches are described: An approach for the heart-rate-adaptive optimization of the temporal resolution is presented. Streak artifacts at cycle-to-cycle transitions can be minimized by using an improved cardiac weighting scheme. The optimal quiescent cardiac phase for the reconstruction can be determined automatically with the motion map technique. Results for all optimization procedures applied to ECR are presented and discussed based on patient and phantom data. The ECR algorithm is analyzed for larger detector arrays of future cone-beam systems throughout an extensive simulation study based on a four-dimensional cardiac CT phantom. The results of the scientific work are summarized and an outlook proposing future directions is given. The presented thesis is available for public download at www.cardiac-ct.net.

  10. 4D PET/CT as a Strategy to Reduce Respiratory Motion Artifacts in FDG-PET/CT

    PubMed Central

    Chi, Alexander; Nguyen, Nam P.

    2014-01-01

    The improved accuracy in tumor identification with FDG-PET has led to its increased utilization in target volume delineation for radiotherapy treatment planning in the treatment of lung cancer. However, PET/CT has constantly been influenced by respiratory motion-related image degradation, which is especially prominent for small lung tumors in the peri-diaphragmatic regions of the thorax. Here, we describe the current findings on respiratory motion-related image degradation in PET/CT, which may bring uncertainties to target volume delineation for image guided radiotherapy (IGRT) for lung cancer. Furthermore, we describe the evidence suggesting 4D PET/CT to be one strategy to minimize the impact of respiratory motion-related image degradation on tumor target delineation for thoracic IGRT. This, in our opinion, warrants further investigation in future IGRT-based lung cancer trials. PMID:25136514

  11. Unusual behaviour of cows prior to a large earthquake

    NASA Astrophysics Data System (ADS)

    Fidani, Cristiano; Freund, Friedemann; Grant, Rachel

    2013-04-01

    Unusual behaviour of domestic cattle before earthquakes has been reported for centuries, and often relates to cattle becoming excited, vocal, aggressive or attempting to break free of tethers and restraints. Cattle have also been reported to move to higher or lower ground before earthquakes. Here, we report unusual movements of domestic cows 2 days prior to the Marche-Umbria (M=6) earthquake in 1997. Cows moved down from their usual summer pastures in the hills and were seen in the streets of a nearby town, a highly unusual occurrence. We discuss this in the context of positive holes and air ionisation as proposed by Freund's unified theory of earthquake precursors.

  12. Unusual persistence of DDT in some western USA soils

    SciTech Connect

    Hitch, R.K.; Day, H.R. (Environmental Protection Agency, Washington, DC (United States))

    1992-02-01

    Agricultural use of DDT (1,1,1-trichloro-2,2,2-bis (p-chlorophenyl) ethane) was canceled in 1972. By the late 1970's and early 1980's, the National Soils Monitoring Program of the US Environmental Protection Agency (EPA) was consistently finding higher soil residues of the degradate DDE (1,1-dichloro 2,2-bis (p-chlorophenyl) ethylene) than of parent DDT. Similarly, the US Fish and Wildlife Service (FWS) had been finding during the late 1970's that DDT and related compounds had been decreasing in birds throughout the US. During 1984 and 1985, the EPA and the agriculture departments of Texas and New Mexico, in response to the FWS, conducted soil sampling in 13 areas where contaminated birds had been collected. It was agreed that soil samples containing higher levels of DDT than DDE would serve as a possible indicator of illegal DDT use. This was an intensive soil sampling program; over 236 fields were sampled. A controversy developed as to whether high ratios of DDT and DDE might corroborate the accusations of recent illegal use of DDT products. Dell City area soils containing higher levels of DDT than of DDE became classified as suspicious soils. Soils bearing the expected higher level of DDE were dubbed as normal. To resolve the controversy, the authors, in 1989, conducted a DDT soil metabolism study with representative samples of the suspicious and normal soils. It was felt that a soil metabolism study could, once and for all, determine if there was, indeed, something unusual about the rate at which the suspicious soils degrade DDT.

  13. Diagnostic and therapeutic impact of SPECT/CT in patients with unspecific pain of the hand and wrist

    PubMed Central

    2012-01-01

    Background Unspecific pain of the hand/wrist is a diagnostic challenge. Radiographs and planar bone scan are useful diagnostic tools in patients with unspecific wrist pain. Both modalities are deficient, either by not presenting metabolic disorders or due to inadequate anatomical resolution. Single photon emission computed tomography/computed tomography (SPECT/CT) claims to fuse both features. Methods Fifty-one patients with persisting wrist pain were referred for evaluation by SPECT/CT. All patients received X-ray and early-phase/late-phase SPECT/CT imaging. SPECT/CT results were compared with X-ray alone and X-ray combined with planar bone scan. The therapeutic impact was evaluated in consensus with the referring hand surgeon. Results A total of 48 lesions were detected on plain radiographs, 117 on planar bone scan, and 142 on SPECT/CT. SPECT/CT detected significantly more lesions than the other imaging modalities. In 30 out of 51 patients (61%), a positive concordance between the clinical diagnosis and SPECT/CT findings was found. In 19 out of 51 patients (37%), SPECT/CT findings had significant impact on consecutive therapy. Conclusions SPECT/CT showed higher lesion detection rates compared to standard X-rays and planar bone scan. Significant impact on patient management could be demonstrated. SPECT/CT might be added to the workup of such a specific patient population when standard imaging fails to detect the patient's main pathology. PMID:23021154

  14. Breast Cancer Research Finding Answers. Finding Cures.

    E-print Network

    Kowalczykowski, Stephen C.

    Breast Cancer Research Finding Answers. Finding Cures. Thanks to improvements in treatment and early detection, more and more women are surviving breast cancer. In fact, the five-year survival rate for women with breast cancer today is 90%, up from only 63% in the 1960s. While progress has clearly been

  15. CT Imaging: Basics and New Trends

    NASA Astrophysics Data System (ADS)

    Peyrin, Françoise; Engelke, Klaus

    This chapter presents the principle of X-ray CT and its evolution during the last 40 years. The first section describes the physical basis of X-ray CT, tomographic image reconstruction algorithms, and the source of artifacts in X-ray CT images. The second section is devoted to the evolution of CT technology from the first translation-rotation systems to multi-slice spiral CTs currently used today. The next section addresses specific developments of CT technology and applications, like perfusion CT, quantitative CT, and spectral CT. The fourth section introduces the problem of radiation exposure delivered to the patient and its evaluation. Finally the last section addresses the development in micro- and even nano-CT which is a rapidly evolving area in preclinical imaging and biology.

  16. Serial volumetric registration of pulmonary CT studies

    NASA Astrophysics Data System (ADS)

    Silva, José Silvestre; Silva, Augusto; Sousa Santos, Beatriz

    2008-03-01

    Detailed morphological analysis of pulmonary structures and tissue, provided by modern CT scanners, is of utmost importance as in the case of oncological applications both for diagnosis, treatment, and follow-up. In this case, a patient may go through several tomographic studies throughout a period of time originating volumetric sets of image data that must be appropriately registered in order to track suspicious radiological findings. The structures or regions of interest may change their position or shape in CT exams acquired at different moments, due to postural, physiologic or pathologic changes, so, the exams should be registered before any follow-up information can be extracted. Postural mismatching throughout time is practically impossible to avoid being particularly evident when imaging is performed at the limiting spatial resolution. In this paper, we propose a method for intra-patient registration of pulmonary CT studies, to assist in the management of the oncological pathology. Our method takes advantage of prior segmentation work. In the first step, the pulmonary segmentation is performed where trachea and main bronchi are identified. Then, the registration method proceeds with a longitudinal alignment based on morphological features of the lungs, such as the position of the carina, the pulmonary areas, the centers of mass and the pulmonary trans-axial principal axis. The final step corresponds to the trans-axial registration of the corresponding pulmonary masked regions. This is accomplished by a pairwise sectional registration process driven by an iterative search of the affine transformation parameters leading to optimal similarity metrics. Results with several cases of intra-patient, intra-modality registration, up to 7 time points, show that this method provides accurate registration which is needed for quantitative tracking of lesions and the development of image fusion strategies that may effectively assist the follow-up process.

  17. Practical CT technology and techniques

    SciTech Connect

    Berland, L.L.

    1987-01-01

    This handbook equips both radiologists and radiologists in training with a thorough working knowledge of the mechanisms and processes of computed tomography (CT) image generation, the common causes of image artifacts, and useful examination protocols for each area of the body. The author explains the fundamental technological principles of CT, focusing on those concepts crucial to successful CT examinations. The first part of the book succinctly reviews the fundamentals of CT technology. It begins with a methodical introduction to key principles of X-ray physics and technology, in which topics such as the modulation transfer function, magnification, and the X-ray tube are discussed in understandable, nonmathematical terms. The author then explains the basic technology of CT scanners, the principles of scan projection radiography, and the essential rules for radiation dosage determination and radiation protection. Careful attention is given to selectable scan factors in both routine and dynamic scanning, as well as to the processes involved in image creation and refinement and the chief determinants of image quality. Basic and specialized program features and the technology of image display, recording, and storage are also thoroughly described.

  18. Unusually severe case of dermatosis neglecta.

    PubMed

    Turrentine, Jake E; Blalock, Travis W; Davis, Loretta S

    2012-01-01

    An 18-year-old black woman with cerebral palsy was admitted for evaluation of an intrathecal baclofen pump site infection. The dermatology service was consulted for treatment suggestions of a presumed diagnosis of chronic tinea capitis. Three courses of oral griseofulvin during the past 2 years failed to resolve the patient's chronic scalp dermatosis. Scalp lesions first began about 2 years earlier after hospitalization for placement of an intrathecal baclofen pump. The patient was unable to care for her scalp due to her cerebral palsy, and her mother interpreted the scalp condition as infectious. No routine shampoo care, scalp care, or topical treatment was performed for more than 1 1/2 years. The mother felt that touching the patient's scalp might cause pain and noted that the majority of her time was spent concentrating on more critical medical issues. Physical examination revealed coalescing hyperkeratotic plaques extending dorsally from the anterior hairline to the occipital scalp with small flecks of keratinous debris throughout the remaining hair (Figure 1). The plate-like plaques were devoid of hair, except at a few fissures where a few tufts of hair emerged. No cervical lymph nodes were appreciated on palpation. Treatment was initiated with compresses consisting of large warm water-soaked towels 4 times daily. Three times a day, a nursing staff applied 5% salicylic acid in olive oil to the scalp under a shower cap for approximately 1 hour. Over the following 2 days, a significant reduction in keratinous debris was appreciated. Within 2 weeks, the bulk of the plaques had been removed (Figure 2). At 6-week follow-up, the underlying scalp showed areas of fibrosis and possible scarring with a few emerging tufts of hair. On the basis of history and response to treatment with salicylic acid and routine scalp care, the patient was diagnosed with an unusually severe case of dermatosis neglecta. PMID:22324178

  19. Is CT Angiogram of the Abdominal Vessels Needed following the Diagnosis of Ischemic Colitis? A Multicenter Community Study

    PubMed Central

    Husein, Husein; Sethuraman, Sankara N.; Vainder, John A.

    2014-01-01

    Background. CT angiogram is frequently obtained after diagnosis of ischemic colitis (IC). Aims. To investigate the vascular findings of CT angiogram as compared to contrast-enhanced CT scan and whether this modality changes the management or prognosis of IC. Methods. We conducted a retrospective analysis of patients with IC from 2007 to 2013. Results. CT angiogram was performed in 34 patients (28.81%), whereas contrast-enhanced CT scan was performed in 54 patients (45.76%). In CT angiogram group, 8 patients (23.5%) had atherosclerotic changes. Stenosis was found in 12 patients (35.3%) (9: celiac trunk, 3: SMA). Among this group, one patient underwent colectomy and another underwent angioplasty of the celiac trunk who died within 30 days. Among contrast-enhanced CT scan group, 5 patients (9.3%) had atherosclerotic changes. Stenosis was found in 5 patients (9.3%) (3: celiac trunk, 1: SMA, and 1: IMA). Among this group, 3 patients had colectomy and one died within 30 days. There was no statistical difference between both groups in all vascular findings except the stenosis which was higher in CT angiogram group (P = 0.0025). Neither the need for surgery nor all-cause mortality was different between both groups. Conclusion. CT angiogram did not provide any useful findings that altered the management or the prognosis of IC. PMID:25089208

  20. Find a Plastic Surgeon

    MedlinePLUS

    ... Corporate Opportunities The PSF About Us Find a Plastic Surgeon Please provide search terms. ZIP or City, ... Procedure Do Your Homework Find a board-certified plastic surgeon you can trust The ASPS find a ...