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1

CT findings in leukemia  

SciTech Connect

Review of 84 computed tomographic (CT) scans in leukemic patients demonstrate a wide spectrum of abnormalities. Findings caused by leukemia were lymphadenopathy, visceral enlargement, focal defects, and tissue infiltration. Hemorrhage was by far the most common complication and could usually be characterized on the noncontrast CT scan. The distinction between old hematomas, foci of infection, and leukemia infiltration could not be made with certainty without CT-guided aspiration. Unusual instances of sepsis, such as microabscesses of the liver and typhlitis, were seen.

Heiberg, E.; Wolverson, M.K.; Sundaram, M.; Shields, J.B.

1984-12-01

2

A Type III Dens Invaginatus with Unusual Helical CT and Histologic Findings: A Case Report  

PubMed Central

Dens Invaginatus (DI) is a rare developmental anomaly which affects the tooth, which shows an infolding of enamel and dentine which extends into the pulp chamber and sometimes into the root. The aim of this case report was to describe its radiographic findings, to emphasize the bizarre morphology and the difficulties which are encountered in the diagnosis by using conventional radiographic techniques and the importance of computed tomography as a valuable diagnostic aid. Dens Invaginatus is clinically significant due to the possibility of an early pulpal involvement and the chronic periapical lesions are often associated with this anomaly without any clinical symptoms. Difficulties are encountered during the endodontic treatment, owing to the complex root canal anatomy; therefore, a proper radiologic evaluation by using different imaging modalities, is essential for its successful treatment.

Mishra, Satyaranjan; Mishra, Lora; Sahoo, Sujit Ranjan

2012-01-01

3

A Type III Dens Invaginatus with Unusual Helical CT and Histologic Findings: A Case Report.  

PubMed

Dens Invaginatus (DI) is a rare developmental anomaly which affects the tooth, which shows an infolding of enamel and dentine which extends into the pulp chamber and sometimes into the root. The aim of this case report was to describe its radiographic findings, to emphasize the bizarre morphology and the difficulties which are encountered in the diagnosis by using conventional radiographic techniques and the importance of computed tomography as a valuable diagnostic aid. Dens Invaginatus is clinically significant due to the possibility of an early pulpal involvement and the chronic periapical lesions are often associated with this anomaly without any clinical symptoms. Difficulties are encountered during the endodontic treatment, owing to the complex root canal anatomy; therefore, a proper radiologic evaluation by using different imaging modalities, is essential for its successful treatment. PMID:23285474

Mishra, Satyaranjan; Mishra, Lora; Sahoo, Sujit Ranjan

2012-11-01

4

Intracerebral pneumatoceles following facial trauma: CT findings  

SciTech Connect

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.

Mendelsohn, D.B.; Hertzanu, Y.

1985-01-01

5

Unusual thoracic CT manifestations of osteosarcoma: review of 16 cases  

Microsoft Academic Search

Pulmonary metastases are common in osteosarcoma and the most common appearance is of multiple well-defined nodules in the\\u000a lung parenchyma. However, a variety of atypical locations and presentations of osteosarcoma metastasis can occur in the thorax.\\u000a We present a review of the thoracic CT findings in 16 patients with histopathologically confirmed osteosarcoma with unusual\\u000a thoracic manifestations. The 16 patients were

Ruchi Rastogi; Rachana Garg; Sanjay Thulkar; Sameer Bakhshi; Ajay Gupta

2008-01-01

6

Perirectal inflammatory disease: CT findings.  

PubMed

The findings on computed tomographic (CT) scans were reviewed in 42 patients with perirectal inflammatory disease and suspected perirectal abscesses. CT was reliable for use in distinguishing perirectal abscesses from cellulitis and in localizing both supralevator and infralevator abscesses. CT allowed correct diagnosis of 13 surgically proved perirectal abscesses in ten patients, including three with residual abscesses after surgical drainage. In three patients with supralevator abscesses, the abscess was missed on initial surgical exploration. In patients without abscesses, CT was helpful in evaluating the extent of perirectal inflammation; however, it was not possible to determine its cause. The anatomy on CT scans of the pararectal spaces is reviewed, with emphasis on useful anatomic landmarks in the axial plane for distinguishing supralevator from infralevator abscesses. PMID:3763858

Guillaumin, E; Jeffrey, R B; Shea, W J; Asling, C W; Goldberg, H I

1986-10-01

7

Krabbe disease: unusual MRI findings  

Microsoft Academic Search

We present the MRI findings in a case of infantile-onset Krabbe disease. Enlargement of the intracranial optic nerves and\\u000a cervical cord were detected in addition to more typical changes in the cerebral white matter and thalami. We also review the\\u000a proton MR spectroscopic findings in Krabbe disease.

Veena A. Nagar; Meher A. Ursekar; Pradeep Krishnan; Bhavin G. Jankharia

2006-01-01

8

CT findings in tuboovarian abscess.  

PubMed

As there are little data in the radiologic literature regarding the CT appearance of and the associated findings of tuboovarian abscesses (TOA), we retrospectively reviewed CT from seven patients with nine TOAs. They were bilateral in two patients and unilateral in the remaining five. The most common appearance of these abscesses was that of a somewhat tubular septated cystic pelvic mass with uniform wall thickness and with loss of fat planes between the mass and the adjacent pelvic organs (usually the uterus when present). Ipsilateral ureterectasis was also seen in four of nine lesions. Although these findings are not specific for TOA, they should be considered when pelvic masses having the above configuration are seen on CT. PMID:2061473

Ellis, J H; Francis, I R; Rhodes, M; Kane, N M; Fechner, K

9

CT Findings in Tuboovarian Abscess  

Microsoft Academic Search

Pelvic inflammatory disease with tuboovarian abscess can cause a wide range of radiologic abnormalities. Although the diagnosis of tuboovarianabscess is usually straighiforward and is based on clinical and sonographicfindings, unusualor unsus- pected cases may be confused with other pelvic or abdominal diseases. The purposeof this essay is to illustratethe CT findings in tuboovarian abscess.

Andrew C. Wilbur; Robert I. Aizenstein; Tracy E. Napp; Pictorial Essay

10

Primary hepatic sarcomas: CT findings  

Microsoft Academic Search

Primary hepatic sarcomas are rare tumors that are difficult to diagnose clinically. Different primary hepatic sarcomas may\\u000a have different clinical, morphologic, and radiological features. In this pictorial review, we summarized computed tomography\\u000a (CT) findings of some relatively common types of hepatic sarcomas, including angiosarcoma, epithelioid hemangioendothelioma\\u000a (EHE), liposarcoma, undifferentiated embryonal sarcoma (UES), leiomyosarcoma, malignant fibrous histiocytoma (MFH), and carcinosarcoma\\u000a (including

Ri-Sheng Yu; Ying Chen; Biao Jiang; Liu-Hong Wang; Xiu-Fang Xu

2008-01-01

11

Keratinous inclusion cyst of oesophagus: unusual finding.  

PubMed

Cysts of the oesophagus are unusual findings and they are classified according to the embryological site of origin. It may represent inclusion cysts, retention cysts and developmental cysts. We present a case of keratinous inclusion cyst of the lower oesophagus in a 71-year-old Malay woman who presented with dyspepsia and severe epigastric pain. An oesophago-gastro-duodenoscopy demonstrated a sliding hiatus hernia with whitish ulcer-like lesion at the lower oesophagus. Biopsy from the lesion revealed a keratinous inclusion cyst. The patient was given pantoprazole and put on regular follow-up for monitoring any other development. PMID:23878290

Wan Abdul Rahman, Wan Faiziah; Mutum, Samarendra Singh; Fauzi, Mohd Hashairi

2013-07-22

12

Specific CT findings in Krabbe disease  

Microsoft Academic Search

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

E. Kwan; J. Drace; D. Enzmann

1984-01-01

13

Acute intestinal anisakiasis: CT findings.  

PubMed

Small bowel anisakiasis is a relatively uncommon disease that results from consumption of raw or insufficiently pickled, salted, smoked, or cooked wild marine fish infected with Anisakis larvae. We report a case of intestinal anisakiasis in a 63-year-old woman presenting with acute onset of abdominal complaints one day after ingestion of raw wild-caught herring from the Northsea. Computed tomography (CT) scanning demonstrated thickening of the distal small bowel wall, mucosa with hyperenhancement, mural stratification, fluid accumulation within dilated small-bowel loops and hyperemia of mesenteric vessels. In patients with a recent history of eating raw marine fish presenting with acute onset of abdominal complaints and CT features of acute small bowel inflammation the possibility of anisakiasis should be considered in the differential diagnosis of acute abdominal syndromes. PMID:23082711

Ozcan, H N; Avcu, S; Pauwels, W; Mortelé, K J; De Backer, A I

2012-09-01

14

obstruction: CT findings in 11 adult patients  

Microsoft Academic Search

The aim of this study is to report the CT findings in patients proved to have congenital internal hernia (CIH) as a cause of small bowel obstruction (SBO). The CT scans of 11 patients (9 men and 2 women, with ages ranging from 20 years to 95 years (mean 60.7 years), presenting with clinical symptoms and signs of SBO without

R ZISSIN; M HERTZ; G GAYER; H PARAN; A OSADCHY

15

Cytomegalovirus pneumonia in transplant patients: CT findings  

SciTech Connect

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.

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

1996-03-01

16

Common and unusual CT and MRI manifestations of pancreatic adenocarcinoma: a pictorial review  

PubMed Central

Pancreatic adenocarcinoma is the most common malignancy of the pancreas with high death rate. Preoperative imaging is crucial for the assessment of the disease and the planning of treatment. In this review, we discussed the common and unusual findings of pancreatic carcinoma. The common CT and MR findings include hypovascular mass, dilataion of upstream biliary and pancreatic ducts, invasion to adjacent structures and metastasis. The uncommon CT and MR findings include: a cystic mass, a mass without dilataion of upstream ducts, multiple masses or a lesion diffusively infiltrating most parts of the pancreas without distorting its configuration.

Yang, Min-Jie; Li, Su; Liu, Yong-Guang; Jiao, Na

2013-01-01

17

Specific CT findings in Krabbe disease  

SciTech Connect

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.

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

1984-09-01

18

An unusual case of Takayasu's arteritis: Evaluation by CT angiography  

PubMed Central

Takayasu's arteritis is a chronic, idiopathic, medium and large vessel vasculitis involving aorta and its main branches. Frequent neurological manifestations include postural syncope, seizures, and blindness. Stroke, as presenting feature of Takayasu's arteritis, is unusual. CT angiography reveals characteristic involvement of aortic arch and its branches. Involvement of intracranial vasculature is rather unusual. We are describing an unusual patient of Takayasu's arteritis who presented with recurrent disabling syncopal attacks and had extensive involvement of intracranial vasculature. CT angiography revealed severe involvement of aortic arch. There was near complete occlusion at origins of both subclavian arteries, distal flow was maintained by collateral vessels along the chest wall. There was near total occlusion (at origin) of right common carotid with normal flow in distal part. The left common carotid was more severely involved showing greater than 80% narrowing in proximal half of the vessel. CT angiography also revealed involvement of left internal carotid artery, narrowing of left middle cerebral artery and involvement of cortical vessels. Patient was treated with oral corticosteroids. She improved remarkably after two and half months of follow up.

Vidhate, Mukund; Garg, Ravindra Kumar; Yadav, Rajesh; Kohli, Neera; Naphade, Praveen; Anuradha, H. K.

2011-01-01

19

An unusual case of Takayasu's arteritis: Evaluation by CT angiography.  

PubMed

Takayasu's arteritis is a chronic, idiopathic, medium and large vessel vasculitis involving aorta and its main branches. Frequent neurological manifestations include postural syncope, seizures, and blindness. Stroke, as presenting feature of Takayasu's arteritis, is unusual. CT angiography reveals characteristic involvement of aortic arch and its branches. Involvement of intracranial vasculature is rather unusual. We are describing an unusual patient of Takayasu's arteritis who presented with recurrent disabling syncopal attacks and had extensive involvement of intracranial vasculature. CT angiography revealed severe involvement of aortic arch. There was near complete occlusion at origins of both subclavian arteries, distal flow was maintained by collateral vessels along the chest wall. There was near total occlusion (at origin) of right common carotid with normal flow in distal part. The left common carotid was more severely involved showing greater than 80% narrowing in proximal half of the vessel. CT angiography also revealed involvement of left internal carotid artery, narrowing of left middle cerebral artery and involvement of cortical vessels. Patient was treated with oral corticosteroids. She improved remarkably after two and half months of follow up. PMID:22346024

Vidhate, Mukund; Garg, Ravindra Kumar; Yadav, Rajesh; Kohli, Neera; Naphade, Praveen; Anuradha, H K

2011-10-01

20

Intestinal Ischemia: US-CT findings correlations  

PubMed Central

Background Intestinal ischemia is an abdominal emergency that accounts for approximately 2% of gastrointestinal illnesses. It represents a complex of diseases caused by impaired blood perfusion to the small and/or large bowel including acute arterial mesenteric ischemia (AAMI), acute venous mesenteric ischemia (AVMI), non occlusive mesenteric ischemia (NOMI), ischemia/reperfusion injury (I/R), ischemic colitis (IC). In this study different study methods (US, CT) will be correlated in the detection of mesenteric ischemia imaging findings due to various etiologies. Methods Basing on experience of our institutions, over 200 cases of mesenteric ischemia/infarction investigated with both US and CT were evaluated considering, in particular, the following findings: presence/absence of arterial/venous obstruction, bowel wall thickness and enhancement, presence/absence of spastic reflex ileus, hypotonic reflex ileus or paralitic ileus, mural and/or portal/mesenteric pneumatosis, abdominal free fluid, parenchymal ischemia/infarction (liver, kidney, spleen). Results To make an early diagnosis useful to ensure a correct therapeutic approach, it is very important to differentiate between occlusive (arterial,venous) and nonocclusive causes (NOMI). The typical findings of each forms of mesenteric ischemia are explained in the text. Conclusion At present, the reference diagnostic modality for intestinal ischaemia is contrast-enhanced CT. However, there are some disadvantages associated with these techniques, such as radiation exposure, potential nephrotoxicity and the risk of an allergic reaction to the contrast agents. Thus, not all patients with suspected bowel ischaemia can be subjected to these examinations. Despite its limitations, US could constitutes a good imaging method as first examination in acute settings of suspected mesenteric ischemia.

2013-01-01

21

Unusual autopsy finding in a case of metastatic teratocarcinoma  

Microsoft Academic Search

An unusual autopsy finding was seen in a young case of metastatic teratocarcinoma of the right testis. The patient presented with features of myocardial ischemia and died of sudden cardiac arrest. At autopsy, the lungs were studded with variably sized metastatic nodules composed of glistening hyaline cartilage. Examination of the coronary arteries revealed complete occlusion of the left anterior descending

Pramod Nath; Shilajit Bhattacharya; Reena Bharadwaj

22

Mature cystic teratomas of the ovary: CT and MR findings  

Microsoft Academic Search

Objective: To correlate CT and MR patterns of ovarian mature cystic teratomas (MCT). Subjects and methods: CT and MR findings in 25 histologically proven ovarian MCT were retrospectively reviewed. MCT characterization at CT and MR was based on detection of fat and\\/or a Rokitansky protuberance. MR signal intensity and CT density numbers of fat were correlated. Results: At pathology, 24\\/25

Claude Guinet; Michel A. Ghossain; Jean-Noël Buy; Luce Malbec; Daničle Hugol; Jean B. Truc; Dominique Vadrot

1995-01-01

23

Peliosis hepatis: triphasic helical CT and dynamic MRI findings  

Microsoft Academic Search

We report the triphasic helical computed tomographic (CT) and dynamic magnetic resonance imaging (MRI) findings in a unique case of biopsy-proven peliosis of the liver. Several reports have described the CT and MRI findings of this entity without specific appearance. This report discusses the usefulness of dynamic helical CT and MRI for the early diagnosis of peliosis.

H. Gouya; O. Vignaux; P. Legmann; G. de Pigneux; A. Bonnin

2001-01-01

24

A case of secondary erythromelalgia with unusual histological findings.  

PubMed

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

Bakkour, Waseem; Motta, Luisa; Stewart, Elizabeth

2013-06-01

25

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

SciTech Connect

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.

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

1986-06-01

26

CT finding of cerebral paragonimiasis in the chronic state  

Microsoft Academic Search

The CT findings in 5 patients with cerebral paragonimiasis in the chronic state are presented. The findings were: 1) multiple, densely calcified areas with a variety of round or nodular shapes in the brain, 2) a large low density area surrounding or connecting with the calcified areas, and 3) cortical atrophy and ventricular dilatation. The relation between the CT findings

F. Udaka; B. Okuda; M. Okada; T. Tsuji; M. Kameyama

1988-01-01

27

CT findings in osteoradionecrosis of the mandible  

Microsoft Academic Search

CT scans of ten patients in whom the diagnosis of mandibular osteoradionecrosis was proven pathologically or by clinical\\u000a follow-up were reviewed. All ten patients had bony abnormalities (cortical interruptions and loss of spongiosa trabeculation)\\u000a on the symptomatic side. These were predominantly seen in the body of the mandible (premolar and molar region, eight patients),\\u000a in some of these cases extending

R. Hermans; E. Fossion; C. Ioannides; W. Van den Bogaert; J. Ghekiere; A. L. Baert

1996-01-01

28

Fitz-Hugh-Curtis syndrome: CT findings of three cases.  

PubMed

Clinical manifestations and computed tomography (CT) findings of Fitz-Hugh-Curtis syndrome (FHCS) are relatively well stabilized as right upper quadrant abdominal pain and hepatic capsular enhancement because of perihepatitis associated with pelvic inflammatory disease caused by N. gonorrhoeae and C. trachomatis. We encountered three patients with serial FHCS associated with pelvic inflammatory disease, who visited the emergency room with right upper quadrant abdominal pain. Abdominal CT revealed hepatic capsular or pericapsular enhancement along the anterior surface of the liver on the arterial phase. Recently, multi-detector CT has evolved as the first-line imaging modality of acute abdomen at the emergency room; we reemphasized the importance of the CT findings of this syndrome for differential diagnosis of right upper quadrant abdominal pain in sexually active young women. Physicians at the emergency room acknowledge the syndrome and should perform dynamic abdominopelvic CT including the arterial phase. PMID:17582537

Cho, Hyeon Je; Kim, Ho Kyun; Suh, Jung Ho; Lee, Ghi Jai; Shim, Jae-Chan; Kim, Young Hwa

2007-06-21

29

Pleuropulmonary and abdominal paragonimiasis: CT and ultrasound findings  

PubMed Central

Objectives The purpose of this study was to review radiological images of patients with Paragonimus westermani (PW) that simultaneously involved the chest and abdomen. Methods Our study included four patients with serologically and histopathologically confirmed paragonimiasis. Abdomen CT (n=3) and chest CT (n=3) scans were available, and abdominal wall ultrasonography was performed in all patients. We retrospectively reviewed the clinical, radiological and histopathological findings of these patients. Results The most common abdominal CT findings were ascites and intraperitoneal or abdominal wall nodules. Low-attenuated serpentine lesions of the liver were another common and relatively specific feature. Conclusion Radiologists should consider the possibility of PW when these abdominal CT findings are noted, especially with pleural effusion or subpleural nodules in patients with initial abdominal symptoms.

Shim, S S; Kim, Y; Lee, J K; Lee, J H; Song, D E

2012-01-01

30

Cytopathologic findings in an immature cystic teratoma: report of an unusual case.  

PubMed

Teratomas are uncommon, usually benign tumors often found in young women. We describe the cytopathology of an unusual case of a large congenital teratoma in a 6-day-old girl. The patient initially showed signs of abdominal distention and a follow-up ultrasound and computerized-tomography (CT) revealed a cystic mass in the pelvis. An ultrasound-guided fine-needle aspiration (FNA) showed small round blue cells suspicious for a primitive neuronal tumor. Resection of the mass displayed a cystic teratoma with distinct nests of small round blue cells representing immature neuroepithelial and glial tissue. Also noted were admixed mature elements of a cystic teratoma. Cytologic finding of a small round blue cell tumor, therefore, was the immature component of the teratoma. This case illustrates the difficulties in diagnosing teratomas due to their extraordinary diversity. PMID:17230577

Balco, Michael T; Burroughs, Frances H; Ali, Syed Z

2007-02-01

31

CT findings in ulcerative, granulomatous, and indeterminate colitis  

SciTech Connect

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.

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

1984-08-01

32

Extramedullary hematopoiesis encasing the pelvicalyceal system: CT findings.  

PubMed

A rare case of symmetric renal extramedullary hematopoiesis is hypothesized in a patient with long-standing Vaquez' disease and myelofibrosis. At CT, soft tissue densities were found in the renal hilar area encasing the pelvicalyceal system. Although there is nothing specific about the CT findings, the diagnosis can be suggested in the proper clinical setting. The association with generalized osteosclerosis is another diagnostic clue. PMID:7632819

Gryspeerdt, S; Oyen, R; Van Hoe, L; Baert, A L; Boogaerts, M

1995-07-01

33

Intestinal malrotation as an incidental finding on CT in adults  

Microsoft Academic Search

Background:Intestinal malrotation in adults is usually an incidental finding on computed tomography (CT). We present the CT findings\\u000a of 18 adult patients with malrotation and discuss the clinical implications.\\u000a \\u000a \\u000a \\u000a \\u000a Methods: Abdominal scans of 18 patients (12 women, six men; age range = 15–79 years) with intestinal malrotation were reviewed. Special\\u000a attention was directed to the location of the superior mesenteric

R. Zissin; V. Rathaus; A. Oscadchy; E. Kots; G. Gayer; M. Shapiro-Feinberg

1999-01-01

34

Fascioliasis: US, CT, and MRI findings with new observations  

Microsoft Academic Search

Background: The purpose of this study is to describe the ultrasonographic (US), computed tomographic (CT), and magnetic resonance imaging\\u000a (MRI) findings in fascioliasis and to emphasize the impact of radiology in diagnosis.\\u000a \\u000a \\u000a \\u000a \\u000a Methods: Radiologic findings in 23 consecutive patients with fascioliasis were prospectively recorded. All patients had at least one\\u000a US and CT examination, and 10 of them were studied

A. Kabaalio?lu; M. Çubuk; U. ?enol; C. Çevikol; K. Karaali; A. Apaydin; T. Sindel; E. Lüleci

2000-01-01

35

Peripapillary detachment in pathologic myopia: Unusual OCT findings  

PubMed Central

Purpose: To report an unusual case of myopic peripapillary retinal detachment (PPRD) imaged by optical coherence tomography (OCT). Methods: Observational case report. Results: OCT showed a nonreflective space between the retinal pigment epithelium and the neurosensory retina with the presence of bridging tissue that could be defined as an outer retinal schisis, which is not typical of myopic PPRD. Conclusion: This case suggests that the spectrum of PPRD in pathological myopia may extend beyond that already described.

Carbonelli, Michele; Savini, Giacomo; Zanini, Maurizio; Barboni, Piero

2007-01-01

36

Finding of CT and MR evaluation of gallbladder hemobilia  

Microsoft Academic Search

  \\u000a We report a case of gallbladder hemobilia secondary to blunt abdominal trauma. The diagnosis was initially based on findings\\u000a on CT scan of the abdomen and correlated with MRI findings. The patient was found to have a distended gallbladder containing\\u000a high-density material consistent with hemobilia. MRI revealed a gallbladder containing material of mixed signal intensity\\u000a consistent with blood products.

Matthew D. Benedict; Richard Rafal

2003-01-01

37

Malignant Peripheral Nerve Sheath Tumour: CT and MRI Findings  

PubMed Central

Malignant peripheral nerve sheath tumour (MPNST) is extremely rare malignancy in the general population, occurring more frequently in patients with Neurofibromatosis type 1 (NF1). In the literature five cases of MPNST arising from the parapharyngeal space (PPS) in patients without neurofibromatosis have been reported. We report imaging techniques in a patient with MPNST in the PPS, who had neither a family history nor sign of NF1. Computed tomography (CT) scan and magnetic resonance imaging (MRI) were performed for a correct therapeutic planning. CT and MRI findings were correlated with hystopathological diagnosis.

Sperandio, Massimiliano; Di Poce, Isabelle; Ricci, Aurora; Di Trapano, Roberta; Costanzo, Elisa; Di Cello, Pierfrancesco; Pelle, Fabio; Izzo, Luciano; Simonetti, Giovanni

2013-01-01

38

Paratracheal lymphadenopathy: radiographic findings and correlation with CT  

SciTech Connect

Possible signs of paratracheal lymphadenopathy on the posteroanterior (PA) chest radiograph were assessed in 98 patients and correlated with computed tomography (CT). The nodes were normal is size in 62 patients and enlarged in 36. While the lateral contour of the superior vena cava (SVC) was convex in 46 patients (47%), 81 (83%) had an increased density in the region of the SVC. When all four parameters were combined, lymphadenopathy could be detected on the PA view in 87 patients (89%). CT demonstrated that the enlarged nodes were anterolateral rather than directly lateral to the trachea and also immediately posterior to the SVC, explaining the findings on the PA radiograph.

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

1985-09-01

39

CT of lumbar spine disk herniation: correlation with surgical findings  

SciTech Connect

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.

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

1984-03-01

40

Thoracic textilomas after myocardial revascularisation: typical CT findings  

PubMed Central

The objective of this work was to report the tomographic findings in five cases of intrathoracic textilomas. The CT scans of five patients presenting with textilomas after being submitted to thoracotomy for myocardial revascularisation were reviewed retrospectively. Two chest radiologists studied the scans independently, and decisions concerning the CT findings were made by consensus. In each of the five cases, the imaging findings were similar and showed lesions resembling an extrapulmonary mass and well-defined contours situated at the marginal posterior pleural surface. In four of the five cases, a low-density centre and peripheral rim-like enhancement were observed after administration of contrast media. The suspicion of textiloma should be raised when a patient with a history of previous myocardial revascularisation surgery presents with an extrapulmonary mass in close contact with the posterior pleural surface.

Nobre, L F; Marchiori, E; May, F; Carrao, A D; Zanetti, G; Machado, D M

2010-01-01

41

Brain CT-Scan Findings in Unconscious Patients after Poisoning  

PubMed Central

The aim of this study was to identify and describe brain CT findings in patients with poisoning or drug overdose and altered mental status. In this study, 403 patients with some degree of loss of consciousness who referred due to poisoning or drug overdose were evaluated by brain CT. The most common cause of intoxication was suicide. Intoxication status was determined by the physician and was mainly based on a history of intoxication, positive toxicologic screen result, or physical evidence suggesting intoxication. Among 403 unconscious patients, 229 patients who were ingested or inhaled Benzodiazepine, Carbamazepine, Carbon Monoxide, Ethanol, Methanol, Opium, Tricyclic antidepressants, and Tramadol included in the study. Others had used multiple drugs and/or toxins, or their intoxication was unknown. Mean age of patients was 37.6 ± 17.7 years (14-95). Among them, 181 (79%) were male. Among all patients, 92 had consumed opium (40.2%), 47 had consumed Benzodiazepines (20.5%) and other patients had been overdosed by other drugs or exposed to other poisonous agents. Totally 38 (16.5%) patients had abnormal CT findings. These included 10 cases of infarction, four cases of hemorrhage, two cases of herniation, 13 cases of edema, and 10 cases of basal ganglia changes (including 9 cases of hypodensity and one case of hypodensity with hemorrhage). A good knowledge of the CT findings in unconscious patients due to poisoning or drug overdose seems to be necessary for radiologists and clinicians. This study is unique in that it reported most of the radiological findings in these patients.

Taheri, Morteza Sanei; Noori, Maryam; Shakiba, Majid; Jalali, Amir Hossein

2011-01-01

42

Primary Serous Papillary Carcinoma of the Peritoneum: CT Findings  

Microsoft Academic Search

AIM: To describe the computed tomography (CT) findings of primary serous papillary carcinoma of the peritoneum. MATERIAL AND METHODS: The clinical data and imaging studies of 36 women aged 37–85 years with primary papillary serous carcinoma of the peritoneum were retrospectively evaluated. Twenty-seven patients presented with general abdominal complaints; all had elevated levels of CA-125. Thirty-two women were post-menopausal, four

Rivka Zissin; Marjorie Hertz; Myra Shapiro-Feinberg; Joelle Bernheim; Marco Altaras; Ami Fishman

2001-01-01

43

Chronic pneumonitis of infancy: high-resolution CT findings  

Microsoft Academic Search

Chronic pneumonitis of infancy (CPI) is a very rare entity. We report the chest radiography and high-resolution CT (HRCT) findings in an infant with histopathologically confirmed CPI. The child was admitted for intensive care 18 h after birth and died at 39 days of age. On HRCT there was diffuse ground-glass change, interlobular septal thickening and discrete centrilobular nodules. An accurate diagnosis

Řystein E. Olsen; Neil J. Sebire; Adam Jaffe; Catherine M. Owens

2004-01-01

44

An unusual aberrant muscle in congenital clubfoot: an intraoperative finding.  

PubMed

Congenital clubfoot is a common congenital deformity, characterized by equinus of the hindfoot and adduction of the midfoot and forefoot, with varus through the subtalar joint complex. A cavus deformity will also be present. The etiology of this congenital deformity remains elusive. Muscle anomalies are not commonly found in patients with idiopathic clubfoot, and, when present, their significance is not clear. The presence of a flexor digitorum accessorius longus muscle and an accessory soleus muscle found at surgical correction of clubfoot deformity has been previously reported. Our case was a female child, aged 2 years, 3 months, who developed bilateral relapsed congenital clubfoot. She was found to have an unusual aberrant muscle in both legs. This was discovered accidentally during surgical correction of her deformity through posteromedial soft tissue release. This muscle might have contributed to the hindfoot varus and equinus in the clubfoot deformity, because the latter were completely corrected after release of the muscle from its insertion. Awareness of such a new anatomic variant, with the other anatomic variants found in clubfoot deformity, will not only improve our understanding of normal lower limb development, but could also lead to improved genetic counseling and diagnostic and treatment methods of such a common congenital deformity. PMID:23415495

Abo El-Fadl, Sameh Mahmoud

2013-02-12

45

Prevalence of Clinically Significant Extraosseous Findings on Unenhanced CT Portions of 18F-Fluoride PET/CT Bone Scans  

PubMed Central

Objective. Due to the frequently interrupted supply of 99mTc-methylene diphosphonate, the use of 18F-fluoride positron emission tomography (PET)/computed tomography (CT) has become more popular. The study aims to determine the percentage of extraosseous findings from the unenhanced CT portion of 18F-fluoride PET/CT scans. Materials and Methods. We retrospectively collected 18F-fluoride PET/CT studies between March 2010 and February 2011. The unenhanced CT portions of 18F-fluoride PET/CT were reviewed for each patient. Significant extraosseous findings related to malignancy from the unenhanced CT were recorded. Results. A total of 158 patients (110 females, 48 males) were included in the study. Clinically significant extraosseous findings from the unenhanced CT were found in 43 patients (27.2%). Previously unknown extraosseous findings were identified in 17 patients (10.8%) after a review of the 18F-fluoride PET/CT scan results. Most of the extraosseous findings were small pulmonary metastases or enlarged metastatic lymph nodes. Conclusion. It is not rare to identify new clinically significant extraosseous findings from the unenhanced CT of 18F-fluoride PET/CT studies. Therefore the clinical management of patients may be altered by the results, and a careful review of the unenhanced CT portion of 18F-fluoride PET/CT is mandatory.

Chen, Chao-Jung; Ma, Shih-Ya

2012-01-01

46

Trisomy 2p: Analysis of unusual phenotypic findings  

SciTech Connect

We present three probands with partial trisomies 2p21-23 due to ins(4;2)(q21;p21p23) pat, 2p23-pter due to t(2;4)(p23;q35)mat, and 2p21-pter due to t(2;11)(p21;q23.3)mat. More than 50 cases of partial trisomy 2p have been reviewed and some abnormalities, unusual for most other types of structural autosomal imbalance, have been found in patients with inherited forms of 2p trisomy and in their non-karyotyped sibs. Neural tube defects (anencephaly, occipital encephalocele, and spina bifida) were found in five probands and 4/6 affected non-karyotyped sibs. The only triplicated segment common to all was 2p24. Different forms of {open_quotes}broncho-pulmonary a/hypoplasia{close_quotes} (including two cases of lung agenesis) were described in four patients (overlapping triplicated segment was 2p21-p25). Three patients (with overlapping triplicated segment 2p23-p25) had diaphragmatic hernia. Abnormal rotation of the heart or L-transposition of large vessels (with or without visceral heterotaxia) was found in two infants (overlapping triplicated segment 2p23-p24). In two patients with common triplicated segment 2p22.3-p25, neuroblastoma has been described. The occurrence of all these defects may be explained either by the action of the same gene(s) mapped to 2p24 or by action of some independent factors located in different segments of the short arm. Although the latter hypothesis is much less probable, it can not be rejected at the present time. We propose the existence of a genetic system controlling surveillance of an abnormal embryo to explain the phenotypic differences between patients with the same imbalance within a family. In some {open_quotes}restrictive{close_quotes} combinations the abnormal embryos will die, although in {open_quotes}permissive{close_quotes} combinations they can survive. 47 refs., 2 figs., 3 tabs.

Lurie, I.W.; Ilyina, H.G.; Gurevich, D.B. [Belorussian Research Institute of Hereditary Disease, Minsk (Russian Federation)] [and others

1995-01-16

47

Zellweger syndrome with unusual findings: non-immune hydrops fetalis, dermal erythropoiesis and hypoplastic toe nails.  

PubMed

The peroxisomal biogenesis disorders (PBDs) comprise the Zellweger spectrum disorders (i.e., Zellweger syndrome, neonatal adrenoleukodystrophy, and infantile Refsum disease) and rhizomelic chondrodysplasia punctata. Peroxisomal biogenesis disorders can be caused by mutations in any of 13 currently known PEX genes, which encode peroxins involved in peroxisomal protein import and/or assembly of the organelle. We report here on a Turkish patient who presented with unusual clinical findings, that included non-immune hydrops, dermal erythropoiesis and hypoplastic toenails, as well as common dysmorphic features of Zellweger syndrome. The patient has also pulmonary hypoplasia, which has been reported in only a few patients with Zellweger syndrome. A peroxisomal biogenesis disorder was confirmed by enzyme analysis and abnormal very long-chain fatty acid (VLCFA) profiles in plasma and fibroblast and immunofluorescence microscopy studies. Subsequent molecular genetic analysis revealed a homozygous c.856C>T mutation (R268X) in the PEX3 gene, which made this patient the third to have a defect in this gene. In contrast to those of the two previously reported patients, the cells of this patient still contained peroxisomal membrane structures (ghosts), seen by immunofluorescence microscopy analysis. The case presented here and the two previously reported cases point out that a PEX3 gene defect may present with fairly heterogeneous clinical findings. This case also raises a possibility that hydrops fetalis may be associated with a PEX3 gene defect and that peroxisomal disorders can be considered in the etiology of hydrops fetalis as well as other cell organelle disorders when one is considering yet undiscovered complementation groups in peroxisomal disorders. PMID:20033294

Dursun, Ali; Gucer, Safak; Ebberink, M S; Yigit, Sule; Wanders, R J A; Waterham, H R

2009-12-23

48

Fluorine-18-fluorodeoxyglucose PET/CT rare finding of a unique multiorgan involvement of Wegener's granulomatosis.  

PubMed

Wegener's granulomatosis (WG) is an uncommon autoimmune disorder, which mainly involves the blood vessels, kidneys and respiratory tract. We report an interesting case of WG with unusual multiorgan involvement in a young male who presented with a short history of right-sided otalgia, nasal obstruction and a right parotid mass. His initial CT and MRI scans showed a large parotid mass with features suggestive of malignancy with bilateral cavitating pulmonary nodules suggesting metastatic disease. The imaging-based differential diagnosis was squamous cell carcinoma or adenoid cystic carcinoma. The microscopic findings on ultrasound-guided biopsy of the parotid mass were, surprisingly, those of acute necrotising granulomatous inflammation with some features suggestive of a vasculitic process. A multidisciplinary team discussion and further investigation resulted in the additional findings of haematuria, raised erythrocyte sedimentation rate and positive serum cytoplasmic anti-neutrophil cytoplasmic antibody test, which led to the diagnosis of WG. Subsequently, the patient developed acute urinary retention owing to gross prostatic enlargement related to further disease involvement, which was confirmed with a positive biopsy. Fluorine-18-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET)/CT scan showed disease distribution at the right maxillary sinus/nasal cavity, right parotid, mediastinum, lungs and prostate. To our knowledge, this is the first reported 18F-FDG PET/CT case with multiorgan involvement in a single WG patient. The patient has improved both clinically and on imaging after appropriate treatment with immunosuppressive therapy and steroids. Although 18F-FDG PET/CT imaging did not actually alter the management of this patient, it can help to establish the disease distribution and guide the biopsy. PMID:21933977

Almuhaideb, A; Syed, R; Iordanidou, L; Saad, Z; Bomanji, J

2011-10-01

49

Fluorine-18-fluorodeoxyglucose PET/CT rare finding of a unique multiorgan involvement of Wegener's granulomatosis  

PubMed Central

Wegener's granulomatosis (WG) is an uncommon autoimmune disorder, which mainly involves the blood vessels, kidneys and respiratory tract. We report an interesting case of WG with unusual multiorgan involvement in a young male who presented with a short history of right-sided otalgia, nasal obstruction and a right parotid mass. His initial CT and MRI scans showed a large parotid mass with features suggestive of malignancy with bilateral cavitating pulmonary nodules suggesting metastatic disease. The imaging-based differential diagnosis was squamous cell carcinoma or adenoid cystic carcinoma. The microscopic findings on ultrasound-guided biopsy of the parotid mass were, surprisingly, those of acute necrotising granulomatous inflammation with some features suggestive of a vasculitic process. A multidisciplinary team discussion and further investigation resulted in the additional findings of haematuria, raised erythrocyte sedimentation rate and positive serum cytoplasmic anti-neutrophil cytoplasmic antibody test, which led to the diagnosis of WG. Subsequently, the patient developed acute urinary retention owing to gross prostatic enlargement related to further disease involvement, which was confirmed with a positive biopsy. Fluorine-18-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET)/CT scan showed disease distribution at the right maxillary sinus/nasal cavity, right parotid, mediastinum, lungs and prostate. To our knowledge, this is the first reported 18F-FDG PET/CT case with multiorgan involvement in a single WG patient. The patient has improved both clinically and on imaging after appropriate treatment with immunosuppressive therapy and steroids. Although 18F-FDG PET/CT imaging did not actually alter the management of this patient, it can help to establish the disease distribution and guide the biopsy.

Almuhaideb, A; Syed, R; Iordanidou, L; Saad, Z; Bomanji, J

2011-01-01

50

Managing incidental findings on abdominal CT: white paper of the ACR incidental findings committee.  

PubMed

As multidetector CT has come to play a more central role in medical care and as CT image quality has improved, there has been an increase in the frequency of detecting "incidental findings," defined as findings that are unrelated to the clinical indication for the imaging examination performed. These "incidentalomas," as they are also called, often confound physicians and patients with how to manage them. Although it is known that most incidental findings are likely benign and often have little or no clinical significance, the inclination to evaluate them is often driven by physician and patient unwillingness to accept uncertainty, even given the rare possibility of an important diagnosis. The evaluation and surveillance of incidental findings have also been cited as among the causes for the increased utilization of cross-sectional imaging. Indeed, incidental findings may be serious, and hence, when and how to evaluate them are unclear. The workup of incidentalomas has varied widely by physician and region, and some standardization is desirable in light of the current need to limit costs and reduce risk to patients. Subjecting a patient with an incidentaloma to unnecessary testing and treatment can result in a potentially injurious and expensive cascade of tests and procedures. With the participation of other radiologic organizations listed herein, the ACR formed the Incidental Findings Committee to derive a practical and medically appropriate approach to managing incidental findings on CT scans of the abdomen and pelvis. The committee has used a consensus method based on repeated reviews and revisions of this document and a collective review and interpretation of relevant literature. This white paper provides guidance developed by this committee for addressing incidental findings in the kidneys, liver, adrenal glands, and pancreas. PMID:20889105

Berland, Lincoln L; Silverman, Stuart G; Gore, Richard M; Mayo-Smith, William W; Megibow, Alec J; Yee, Judy; Brink, James A; Baker, Mark E; Federle, Michael P; Foley, W Dennis; Francis, Isaac R; Herts, Brian R; Israel, Gary M; Krinsky, Glenn; Platt, Joel F; Shuman, William P; Taylor, Andrew J

2010-10-01

51

Fibropolycystic liver disease: CT and MR imaging findings.  

PubMed

Fibropolycystic liver disease encompasses a spectrum of related lesions of the liver and biliary tract that are caused by abnormal embryologic development of the ductal plates. These lesions (congenital hepatic fibrosis, biliary hamartomas, autosomal dominant polycystic disease, Caroli disease, choledochal cysts) can be clinically silent or can cause signs and symptoms such as cholangitis, portal hypertension, gastrointestinal bleeding, infections, and space-occupying masses. The different types of fibropolycystic liver disease demonstrate characteristic findings at computed tomography (CT) and magnetic resonance (MR) imaging. Patients with congenital hepatic fibrosis typically have imaging evidence of liver morphologic abnormalities, varices, splenomegaly, renal lesions, and other associated ductal plate abnormalities. Biliary hamartomas usually manifest as multiple cysts that are nearly uniform in size and measure up to 15 mm in diameter. Autosomal dominant polycystic disease typically manifests as an enlarged and diffusely cystic liver. In Caroli disease, cystic or fusiform dilatation of the intrahepatic ducts is seen, as well as the "central dot sign," which corresponds to a portal vein branch protruding into the lumen of a dilated bile duct. Choledochal cyst manifests as a fusiform or cystic dilatation of the extrahepatic bile duct. Awareness of these CT and MR imaging features is essential in detecting and differentiating between various fibropolycystic liver diseases and can assist in proper management. PMID:15888616

Brancatelli, Giuseppe; Federle, Michael P; Vilgrain, Valérie; Vullierme, Marie-Pierre; Marin, Daniele; Lagalla, Roberto

52

Normal Laryngeal CT Findings after Supracricoid Partial Laryngectomy  

Microsoft Academic Search

BACKGROUND AND PURPOSE: Supracricoid horizontal partial laryngectomy (SCPL) is increasingly used to treat endolaryngeal carcinoma. However, few radiologic reports of these procedures exist. Our purpose was to evaluate the normal CT appearance of the neolarynx after surgery. METHODS: SCPL includes cricohyoidopexy (CHP), cricohyoidoepiglottopexy (CHEP), and tracheocricohyoidoepiglottopexy (TCHEP). We examined CT scans obtained from 18 patients without local superficial recurrence who

N. Bely-Toueg; P. Halimi; O. Laccourreye; F. Laskri; D. Brasnu; G. Frija

53

Mylohyoid muscle defects: comparison of CT findings and dissected specimens  

Microsoft Academic Search

Objectives  To investigate whether CT images reflect the anatomical condition of mylohyoid muscle defects by confirmation with subsequent\\u000a dissection of cadavers, and to evaluate whether CT images are useful for detecting such defects.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  CT scans of the head and upper neck were performed in six cadavers. Multiplanar reconstruction was carried out to obtain 2-mm-thick\\u000a axial and coronal images of the mylohyoid

Mika Otonari-Yamamoto; Koh Nakajima; Yuriko Tsuji; Hugh D. Curtin; Hitoshi Hanyuda; Tomohiro Okano; Tsukasa Sano

2011-01-01

54

Mesenteric Vascular Occlusion: Comparison of Ancillary CT Findings between Arterial and Venous Occlusions and Independent CT Findings Suggesting Life-Threatening Events  

PubMed Central

Objective To compare the ancillary CT findings between superior mesenteric artery thromboembolism (SMAT) and superior mesenteric vein thrombosis (SMVT), and to determine the independent CT findings of life-threatening mesenteric occlusion. Materials and Methods Our study was approved by the institution review board. We included 43 patients (21 SMAT and 22 SMVT between 1999 and 2008) of their median age of 60.0 years, and retrospectively analyzed their CT scans. Medical records were reviewed for demographics, management, surgical pathology diagnosis, and outcome. We compared CT findings between SMAT and SMVT groups. Multivariate analysis was conducted to determine the independent CT findings of life-threatening mesenteric occlusion. Results Of 43 patients, 24 had life-threatening mesenteric occlusion. Death related to mesenteric occlusion was 32.6%. A thick bowel wall (p < 0.001), mesenteric edema (p < 0.001), and ascites (p = 0.009) were more frequently associated with SMVT, whereas diminished bowel enhancement (p = 0.003) and paralytic ileus (p = 0.039) were more frequent in SMAT. Diminished bowel enhancement (OR = 20; p = 0.007) and paralytic ileus (OR = 16; p = 0.033) were independent findings suggesting life-threatening mesenteric occlusion. Conclusion The ancillary CT findings occur with different frequencies in SMAT and SMVT. However, the independent findings indicating life-threatening mesenteric occlusion are diminished bowel wall enhancement and paralytic ileus.

Wu, Cheng-Hsien; Wang, Li-Jen; Chen, Huan-Wu; Lin, Being-Chuan; Huang, Chen-Chih

2013-01-01

55

A case report: radiological findings in an unusual case of calciphylaxis 16 years after renal transplantation.  

PubMed

Calciphylaxis is a serious and potentially life-threatening disorder characterized by medial calcification of arterioles leading to subcutaneous ischemia and skin necrosis. It is most commonly seen in patients with end-stage renal disease or shortly after renal transplantation. We report an unusual case of calciphylaxis occurring 16 years after renal transplantation in a 48-year-old female with a failing graft, along with histological and striking radiological findings. PMID:23754731

Smith, Sarahn; Inaba, Akimichi; Murphy, Joseph; Campbell, Gary; Toms, Andoni P

2013-06-11

56

CT, MRI, and FDG-PET\\/CT imaging findings of abdominopelvic desmoplastic small round cell tumors: Correlation with histopathologic findings  

Microsoft Academic Search

ObjectiveTo analyze computed tomography (CT), magnetic resonance imaging (MRI), and fluorodeoxyglucose-positron emission tomography (FDG-PET)\\/CT imaging features of abdominopelvic desmoplastic small round cell tumor (DSRCT) and to improve the diagnostic efficacy of these techniques for the detection of such tumor.

Wei-dong Zhang; Chuan-xing Li; Qing-yu Liu; Ying-ying Hu; Yun Cao; Jin-hua Huang

2011-01-01

57

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

PubMed Central

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.

Wu, Mei

2013-01-01

58

Primary Cardiac Lymphoma: Helical CT Findings and Radiopathologic Correlation  

SciTech Connect

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.

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

59

Utility of CT findings on diagnosis of occupational lung disease  

Microsoft Academic Search

IntroductionWe experienced two occupational lung diseases on a different situation in military training. The purpose of this study was to investigate the use of CT images for inhaled pulmonary edema from the standpoint of early diagnosis and assessment of severity.

Y. Masaki; K. Sugiyama; H. Tanaka; Y. Uwabe; M. Takayama; M. Sakai; T. Hayashi; M. Otsuka; S. Suzuki

2006-01-01

60

Spontaneous vertebral dissection: Clinical, conventional angiographic, CT, and MR findings  

SciTech Connect

The purpose of this study was to determine if typical clinical and neuroradiologic patterns exist in patients with spontaneous vertebral artery (VA) dissection. The medical records and neuroradiologic examinations of 14 patients with spontaneous VA dissection were reviewed. The medical records were examined to exclude patients with a history of trauma and to record evidence of a nontratimatic precipitating event ({open_quotes}trivial trauma{close_quotes}) and presence of possible risk factors such as hypertension. All patients under-went conventional angiography, 13 either CT or MRI (II both CT and MRI), and 3 MRA. Conventional arteriograrris were evaluated for dissection site, evidence of fibromuscular dysplasia, luminal stenosis or occlusion, and pseudoaneurysm formation, CT examinations for the presence of infarction or subarachnoid hemorrhage, MR examinations for the presence of infarction or arterial signal abnormality, and MR angiograms for abnormality of the arterial signal column. Seven patients had precipitating events within 24 h of onset of symptoms that may have been causative of dissection and five had hypertension. At catheter angiography, two patients had dissections in two arteries (both VAs in one patient, VA and internal carotid artery in one patient), giving a total of 15 VAs with dissection. Dissection sites included V1 in four patients, V2 in one patient, V3 in three patients, V4 in six patients, and both V3 and V4 in one patient. Luminal stenosis was present in 13 VAs, occlusion in 2, pseudoaneurysm in 1, and evidence of fibromuscular dysplasia in 1. Posterior circulation infarcts were found on CT or MR in five patients. Subarachnoid hemorrhage was found on CT in two patients and by lumbar puncture alone in two patients. Abnormal periarterial signal on MRI was seen in three patients. MRA demonstrated absent VA signal in one patient, pseudoaneurysm in one, and a false-negative examination in one.

Provenzale, J.M.; Morgenlander, J.C. [Duke Univ. Medical Center, Durham, NC (United States); Gress, D. [Univ. of California, San Francisco, CA (United States)

1996-03-01

61

Early CT findings after interstitial radiation therapy for primary malignant brain tumors  

SciTech Connect

The CT findings after interstitial radiation therapy for brain tumors have not been extensively described. We evaluated retrospectively the CT scans of 13 patients who were treated with brachytherapy for malignant glioma. We found no typical CT appearance that differentiates recurrent tumor from radiation effect. After undergoing brachytherapy, eight of the 13 patients scanned demonstrated enhancement of brain tissue beyond the margins of the original enhancing tumor mass. In most cases, the pattern of enhancement diminished and extended more peripherally from the central necrotic area with time. We also report a new CT finding of focal calcification developing at the site of the radioactive implant.

Tolly, T.L.; Bruckman, J.E.; Czarnecki, D.J.; Frazin, L.J.; Lewis, H.J.; Richards, M.J.; Adamkiewicz, J.J. Jr.

1988-11-01

62

Unusual findings on host-tick interactions through carnivore scat analysis.  

PubMed

In the course of a study on the diet of two Portuguese carnivores, the red fox (Vulpes vulpes Linnaeus) and the common genet (Genetta genetta Linnaeus), 276 ticks were found inside the 940 scats analyzed. Prevalence in samples was 7.6% for both predators. Association of ticks with prey identified on scats, resulted in new data for Portugal on host-tick interactions [e.g. Ixodes acuminatus (Neumann, 1901) and wood mouse] and tick distribution pattern. These unusual findings, besides shedding some light on the host-tick Portuguese assemblage, revealed scats as a new source of biological information. PMID:18040872

Rosalino, Luís M; Rodrigues, Marina; Santos-Silva, Margarida; Santos-Reis, Margarida

2007-11-27

63

An Unusual Case of Hemosiderotic Fibrohistiocytic Lipomatous Lesion: Correlation of MRI and Pathologic Findings  

PubMed Central

The spectrum of lipomatous lesions ranges from benign to highly malignant disease. Differentiation between these lesions is important to indicate prognosis and choose the most appropriate treatment. Hemosiderotic fibrohistiocytic lipomatous lesion (HFLL) is a rare subtype of lipomatous tumor. The diagnosis is usually based on clinical, histological, and immunohistochemical information. Where magnetic resonance (MR) imaging is a suitable modality to assess fatty tumors, no data is reported on MR imaging of HFLL. Here, the MR characteristics are described in correlation with pathologic findings in a case of HFLL in the left thigh, an unusual location.

de Vreeze, Ronald S. A.; Koops, Wim; Haas, Rick L.; van Coevorden, Frits

2008-01-01

64

Scrolls of Descemet's membrane as unusual giant nodules on the posterior cornea: histochemical and ultrastructural findings.  

PubMed Central

Unusual giant nodules on the posterior surface of Descemet's membrane were observed in two out of over 400 corneae examined during routine histopathological reporting. Both of the patients, a 60-year-old man and a 26-year-old woman, had histories of corneal trauma. Neither was associated with chronic keratitis or corneal dystrophy. Light microscopy showed these nodules to be composed of material resembling Descemet's membrane. Histochemical and electron microscopical preparations identified oxytalan fibres within the outer layers of the nodules. These fibres are not a feature of the normal adult Descemet's membrane. The findings are discussed and compared with other nodular lesions of Descemet's membrane. Images

Alexander, R A; Rahi, A H

1986-01-01

65

Crouzon syndrome associated with acanthosis nigricans: prenatal 2D and 3D ultrasound findings and postnatal 3D CT findings  

PubMed Central

Crouzon syndrome with acanthosis nigricans (CAN) is a very rare condition with an approximate prevalence of 1 per 1 million newborns. We add the first report on prenatal 2D and 3D ultrasound findings in CAN. In addition we present the postnatal 3D CT findings. The diagnosis was confirmed by molecular testing.

N?rgaard, Pernille; Hagen, Casper Petri; Hove, Hanne; Dun?, Morten; Nissen, Kamilla Rothe; Kreiborg, Sven; J?rgensen, Finn Stener

2012-01-01

66

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

SciTech Connect

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.

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

67

CT demonstration of a 5th ventricle—a finding to KO boxers?  

Microsoft Academic Search

The reported prevalence of 5th ventricles based on air studies varies from 1–12% and ranges up to 60% as an autopsy finding. The prevalence of what is usually an incidental anomaly has not been determined by computed tomography (CT). 5th ventricles are however known to be more common in brain damaged boxers and with the introduction of compulsory CT scanning

P. Macpherson; E. Teasdale

1988-01-01

68

Significance of extrapancreatic findings in computed tomography (CT) of acute pancreatitis.  

PubMed

Computed tomography (CT) has proven reliable in the early detection of acute haemorrhagic pancreatitis. In the present study the extrapancreatic changes at CT were studied in 60 patients with acute pancreatitis. The CT findings were correlated to the early "prognostic signs" by Ranson and the clinical course of the disease. All the patients with minor extrapancreatic changes recovered without complications. When moderate to severe extrapancreatic changes were seen the incidence of haemorrhagic pancreatitis and the risk of development of pseudocyst or abscess was high. In these patients a dynamic contrast enhanced CT should be done in order to select the patients with haemorrhagic pancreatitis. PMID:3878784

Schröder, T; Kivisaari, L; Somer, K; Standertskjöld-Nordenstam, C G; Kivilaakso, E; Lempinen, M

1985-11-01

69

Transient and rapidly resolving intrahepatic portal gas: CT findings.  

PubMed

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

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

70

Exogenous lipoid pneumonia: high-resolution CT findings  

Microsoft Academic Search

.   The aim of this study was to assess high-resolution computed tomography (HRCT) findings of exogenous lipoid pneumonia. High-resolution\\u000a computed tomography was obtained in 25 patients with proven exogenous lipoid pneumonia resulting from aspiration of squalene\\u000a (derived from shark liver oil). Diagnosis was based on biopsy (n = 9), bronchoalveolar lavage (n = 8), or sputum cytology and clinical findings

J. S. Lee; J.-G. Im; K. S. Song; J. B. Seo; T.-H. Lim

1999-01-01

71

Esophagography After Pneumomediastinum Without CT Findings of Esophageal Perforation: Is It Necessary?  

PubMed

OBJECTIVE. The purpose of our study was to determine the necessity of fluoroscopic esophagography in patients with pneumomediastinum on CT but without CT findings of esophageal perforation. MATERIALS AND METHODS. From January 1, 2006, through December 31, 2010, there were 4305 fluoroscopic esophagography examinations including 533 with CT identified from a search of our PACS. Patients with pneumomediastinum on CT who were subsequently referred for emergent fluoroscopic esophagography to exclude esophageal perforation were enrolled. Fluoroscopic esophagography examinations performed within 3 days of CT were included. Patients with a history of esophageal disease were excluded. As a result, 103 patients were enrolled in the study; patients were divided into groups on the basis of whether there was additional clinical history of esophageal damage (trauma group) or not (nontrauma group). Images were reviewed by two board-certified radiologists blinded to the clinical data and radiologic reports for the presence or absence of esophageal perforation. A positive result on CT was defined as esophageal injury or periesophageal infiltration that coexisted with periesophageal air. A positive fluoroscopic esophagography result was defined as oral contrast medium leakage from the esophagus. RESULTS. Esophageal perforation was diagnosed in 15 of the 103 patients. The CT findings were significantly correlated with esophageal perforation (p < 0.001 in the trauma group, and p = 0.001 in the nontrauma group). The respective sensitivity and negative predictive value (NPV) of CT versus fluoroscopic esophagography in the trauma group were 100% versus 66.7% and 100% versus 87.9%; in the nontrauma group, the sensitivity and NPV were 100% for CT and fluoroscopic esophagography. Thus, the sensitivity and NPV of CT were either superior or equal to those of fluoroscopic esophagography. CONCLUSION. The results of our study suggest that performing fluoroscopic esophagography in patients with pneumomediastinum is unnecessary when CT is negative for esophageal perforation. PMID:24147467

Wu, Cheng-Hsien; Chen, Chien-Ming; Chen, Chien-Cheng; Wong, Yon-Cheong; Wang, Chao-Jan; Lo, Wan-Chak; Wang, Li-Jen

2013-11-01

72

Extensive dentigerous cyst associated with a mesiodens: CT findings.  

PubMed

The most common of the supernumerary teeth in humans are mesiodentes, which arise in the midline of the maxilla between the central incisors. The most common pathologic findings associated with a mesiodens are retention of the adjacent incisors, malposition, and diastema. The development of a dentigerous cyst in association with an impacted mesiodens is relatively uncommon. We report the case of a 35-year-old man with an extensive dentigerous cyst associated with a mesiodens who presented with a painful swelling in the left nasolabial area. We discuss the imaging findings in this case, particularly the contribution of computed tomography, and we review the literature on this interesting condition. PMID:23975501

Kim, Kyung Soo; Mun, Seog-Kyun

2013-08-01

73

Pertinent reportable incidental cardiac findings on chest CT without electrocardiography gating: review of 268 consecutive cases.  

PubMed

BackgroundPertinent reportable cardiac findings on non-electrocardiography (ECG)-gated chest CT examinations have become easier to detect given recent advancements in multidetector CT technology. However, those findings are easily overlooked on routine chest CT without ECG gating given residual inherent cardiac motion artifact and non-cardiac indications.PurposeTo describe and quantify the types of pertinent reportable cardiac findings that can be detected on chest CT examinations without ECG gating and evaluate how often they were reported.Material and MethodsTwo radiologists retrospectively reviewed (blinded to the original interpretation) 268 consecutive routine adult chest CT examinations without ECG gating for the presence of pertinent reportable cardiac findings. Retrospective interpretations were then compared with the original radiological reports.ResultsOne hundred and sixty-three patients (61%) had pertinent reportable cardiac findings. The findings encountered included: coronary artery disease (n = 131; 80.0%), coronary artery bypass grafts (n = 10; 6.1%), left ventricular aneurysm (n = 1; 0.6%), valve calcification (n = 131; 80.0%), valve repair/replacement (n = 5; 3.1%), pericardial effusion (n = 33; 20.2%), left atrial appendage thrombus (n = 1; 0.6%), cardiac mass (n = 1; 0.6%), and cardiac chamber enlargement (n = 29; 17.8%). On the original radiological reports 22.3% of the pertinent reportable cardiac findings, detected by the two radiologists retrospectively, were not reported.ConclusionDetection of pertinent reportable cardiac findings on routine chest CT examinations without ECG gating is possible. The high volume of chest CT examinations without ECG gating represents an opportunity for radiologists to comment on the presence or absence of cardiac disease which may influence future clinical decisions. PMID:23436832

Choy, Garry; Kröpil, Patric; Scherer, Axel; El-Sherief, Ahmed H; Chung, Jonathan; Rojas, Carlos A; Abbara, Suhny

2013-02-23

74

High-resolution CT findings of patients with pulmonary nocardiosis  

PubMed Central

Background Opportunistic pulmonary infection with Nocardia species is rare in humans, and only a few studies have radiologically analyzed patients with pulmonary nocardiosis using high-resolution computed tomography (HRCT). Methods We retrospectively reviewed the medical records of patients with pulmonary nocardiosis at our hospital between April 2006 and December 2011 to assess HRCT and clinical findings. We also searched the medical literature for pulmonary nocardiosis reported in Japan between 2002 and 2011 for comparison. Results We identified seven patients at our institution and 33 reported infections in Japan. Four of our patients were immunocompetent, whereas the other three had impaired cellular immunity due to type 2 diabetes mellitus or having been inappropriately treated with steroid. Thoracic HRCT revealed no zonal predominance, but tropism for distribution from the middle to the peripheral area, and radiological findings of nodules, cavitation, mass, consolidations, bronchial wall thickening, septal line thickening and ground glass opacity (GGO) were evident. The main HRCT finding in our study comprised nodules (n=5, 71.4%) <30 mm and four patients had multiple nodules as described in other reports. Furthermore, we discovered a crazy paving appearance (CPA) around nodules, cavities, masses or consolidations in five patients (71.4%). Conclusions Multiple nodules distributed from the middle to the peripheral area on HRCT might reflect pulmonary nocardiosis, and CPA seemed to be a worth paying attention to the diagnosis.

Tsujimoto, Naoki; Saraya, Takeshi; Kikuchi, Ken; Takata, Saori; Kurihara, Yasuyuki; Hiraoka, Sayuki; Makino, Hiroshi; Yonetani, Shota; Araki, Koji; Ishii, Haruyuki; Takizawa, Hajime

2012-01-01

75

Mediastinal imaging in myasthenia gravis: correlation of chest radiography, CT, MR, and surgical findings.  

PubMed

Chest radiographs and CT and MR images of the mediastinum were studied in 16 patients with myasthenia gravis who underwent thymectomy (two with a final diagnosis of thymoma, seven with hyperplasia, and seven with a normal thymus). The anterior mediastinum was analyzed on imaging studies for thymic morphology and the presence of mass lesions, and the findings were then correlated with the results of surgical resection and pathologic examination. The chest radiographs detected an anterior mediastinal mass in two patients consistent with thymoma on subsequent CT and MR examinations. Chest radiographs in the other 14 patients were normal. In seven patients with a final diagnosis of thymic hyperplasia, both CT and MR demonstrated normal thymic morphology in five, an enlarged thymus in one, and a small thymus in one that was easily identified on CT but was difficult to define on MR. In the other seven patients with a normal thymus on pathologic examination, both CT and MR showed an involuted thymus in four, a normal thymus in two, and an enlarged thymus in one. While both CT and MR were superior to chest radiography for studying the thymus, CT provided better spatial resolution and thymic definition in a much shorter scanning time than MR did. This study suggests that CT should remain the procedure of choice when further imaging of the thymus is needed after the initial chest radiographs in patients with myasthenia gravis. PMID:3492878

Batra, P; Herrmann, C; Mulder, D

1987-03-01

76

Metrizamide CT myelography in cervical myelopathy and radiculopathy: correlation with conventional myelography and surgical findings  

SciTech Connect

Conventional myelography, metrizamide computed tomographic (CT) myelography, and surgical findings were correlated in 30 patients with cervical radiculopathy and/or myelopathy. In 60% of patients, metrizamide CT myelography provided significant additional information including better characterization of the abnormality, lateralization if the conventional myelogram was indeterminate, more definitive demonstration of cord atrophy, foraminal narrowing not appreciated on myelography, and demonstration of abnormalities distal to a myelographic block. In no case was a myelographic abnormality not detected on metrizamide CT meyelography. In patients with cervical myelopathy, a cross-sectional diameter of the cord equaling less than 50% of the subarachnoid space is predictive of poor patient response to surgical intervention.

Badami, J.P.; Norman, D.; Barbaro, N.M.; Cann, C.E.; Weinstein, P.R.; Sobel, D.F.

1985-04-01

77

Vacuum phenomenon in osteoarthritis of the atlanto-odontoid joint: CT findings  

Microsoft Academic Search

Out of 620 consecutive examinations of the atlanto-odontoid joint in patients referred for computed tomography (CT) of the brain or paranasal sinuses, gas collection within the atlanto-odontoid joint was observed in 12 (1.9%). Degenerative abnormalities at the atlanto-odontoid joint were significantly more frequent in patients with a gas-induced vacuum phenomenon than in an age-matched control group. The CT findings and

Jiri Zapletal; Ruben E. M. Hekster; Jan T. Wilmink; Jo Hermans

1995-01-01

78

Low-grade fibromyxoid sarcoma: CT, sonography, and MR findings in 3 cases.  

PubMed

Low-grade fibromyxoid sarcoma (LGFMS) is a distinctive variant of fibrosarcoma characterized by deceptively bland histologic features and a paradoxically aggressive clinical course. The radiologic finding of this uncommon tumor has not been described to date. In this report, 3 cases of LGFMS occurring in axilla, chest wall, and pleura are presented with CT, MRI, and sonographic findings. PMID:16282909

Kim, Su Young; Kim, Mi-Young; Hwang, Yoon Joon; Han, Yoon Hee; Seo, Jung Wook; Kim, Yong Hoon; Cha, Soon Joo; Hur, Gham

2005-11-01

79

Unusual MRI findings in an immunocompetent patient with EBV encephalitis: a case report  

PubMed Central

Blackground It is well-known that Epstein-Barr virus (EBV) can affect the central nervous system (CNS). Case presentation Herein the authors report unusual timely Magnetic Resonance Imaging (MRI) brain scan findings in an immunocompetent patient with EBV encephalitis. Diffusion weighted MRI sequence performed during the acute phase of the disease was normal, whereas the Fast Relaxation Fast Spin Echo T2 image showed diffuse signal intensity changes in white matter. The enhancement pattern suggested an inflammatory response restricted to the brain microcirculation. Acyclovir and corticosteroid therapy was administered. After three weeks, all signal intensities returned to normal and the patient showed clinical recovery. Conclusion This report demonstrates that EBV in an immunocompetent adult can present with diffuse, reversible brain white matter involvement in the acute phase of mononucleosis. Moreover, our case suggests that a negative DWI sequence is associated with a favorable improvement in severe EBV CNS infection. More extensive studies are needed to assess what other instrumental data can help to distinguish viral lesions from other causes in the acute phase of disease.

2011-01-01

80

An unusual 131I-avid adrenal metastasis from follicular thyroid carcinoma identified by 131I-SPECT/CT.  

PubMed

The adrenal gland is an uncommon site of metastasis from differentiated thyroid carcinoma, and I-avid adrenal metastatic lesions are even rarer. Here, we describe a 54-year-old woman with I-avid adrenal metastasis from follicular thyroid carcinoma identified using I whole-body scan (I-WBS) and I-SPECT/CT. I-SPECT/CT allowed superior localization of the equivocal I uptake in the I-WBS. It provides metabolic and anatomic information about a lesion, resulting in accurate localization and improved definition of I-WBS findings. PMID:22889799

Xue, Yan-Li; Song, Hong-Jun; Qiu, Zhong-Ling; Luo, Quan-Yong

2012-09-01

81

Serial CT Findings of Nodular Bronchiectatic Mycobacterium avium Complex Pulmonary Disease With Antibiotic Treatment.  

PubMed

OBJECTIVE. The objective of our study was to analyze the serial CT findings of patients with the nodular bronchiectatic form of Mycobacterium avium complex (MAC) pulmonary disease treated with antibiotic therapy. MATERIALS AND METHODS. Between January 2005 and December 2009, MAC lung disease was diagnosed in 475 patients at a single tertiary referral hospital. Of the 475 patients, 339 had a CT pattern of disease consistent with the nodular bronchiectatic form. Among these 339 patients, 110 patients treated with a combination of antibiotics for 1 year were selected for this study. Two independent chest radiologists reviewed retrospectively the chest CT scans of 101 patients (M. avium disease [n = 57] and M. intracellulare disease [n = 44]) in whom serial CT scans had been obtained at the beginning of and at 12 months after standardized therapy. Each CT study was assessed for the presence and extent of lung parenchymal abnormalities (maximum score, 30). RESULTS. After 12 months of antibiotic therapy, 84 patients (83%) had a decrease in the overall CT score, three (3%) had an increase, and 14 (14%) had no change in disease extent. The decrease in total CT score was statistically significant (overall score difference, 2.54; p < 0.0001). Cellular bronchiolitis showed the largest decrease in extent (difference in mean pre and posttreatment scores, -1.02, -1.07, and -0.94 for MAC, M. avium, and M. intracellulare diseases, respectively). Before treatment, patients with M. intracellulare disease showed more extensive disease than patients with M. avium disease (total CT score, 13.31 vs 11.10; p = 0.025). CONCLUSION. In the nodular bronchiectatic form of MAC pulmonary disease, lung parenchymal abnormalities show a significant decrease in extent on CT after antibiotic treatment and the decrease is mainly related to the improvement of cellular bronchiolitis. PMID:24059365

Lee, Geewon; Kim, Hyun Su; Lee, Kyung Soo; Koh, Won-Jung; Jeon, Kyeongman; Jeong, Byeong-Ho; Ahn, Joonghyun

2013-10-01

82

Epiploic appendage torsed within a spigelian hernia: US and CT findings.  

PubMed

We report the sonographic and CT findings in a patient with an epiploic appendage strangulated within a Spigelian hernia sac. The patient presented with a small, tender, palpable mass, which, at sonography, was located within the abdominal wall, lateral to the rectus abdominis muscle, and had the appearance of an inflamed epiploic appendage. The same findings were confirmed by unenhanced CT. Surgery showed an epiploic appendage of the sigmoid colon within a small Spigelian hernia; the appendage was torsed around its pedicle at the entrance into the hernia sac. PMID:21935961

Capaccio, Enrico; Di Vito, Lucia; Derchi, Lorenzo E

2011-09-20

83

FDG PET/CT Findings in 3 Cases of Solitary Necrotic Nodule of the Liver.  

PubMed

Solitary necrotic nodule (SNN) of the liver is a rare benign lesion that can mimic malignancy. We present 3 cases of SNN with F-FDG PET/CT findings. In case 1, the SNN with complete necrosis and thin fibrous capsule appeared hypometabolic. In case 2, the SNN with a large amount of necrosis and irregular thickened wall appeared hypermetabolic in the periphery. In case 3, the SNN with a small amount of necrosis appeared hypermetabolic in the whole nodule. FDG PET/CT findings reflect the histopathological composition of SNN and its evolution stage. PMID:23510882

Dong, Aisheng; Xiao, Zhengguang; Dong, Hui; Zuo, Changjing

2013-03-18

84

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

SciTech Connect

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.

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

1985-07-01

85

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

Microsoft Academic Search

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

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

86

Cerebellar ataxia. Clinical and CT findings in two cases of rare etiology  

Microsoft Academic Search

Two low density lesions of the cerebellum which did not occupy space are reported. The neuropathological diagnosis of one case was subacute leucencephalitis. In the other case, the diagnosis of a Pelizaeus-Merzbacher's disease is discussed, taking into consideration the clinical observation, development and the CT findings.

H. Zeumer; F. Kotlarek; A. Blankennagel

1980-01-01

87

Extracolonic Findings on CT Colonography Increases Yield of Colorectal Cancer Screening.  

National Technical Information Service (NTIS)

The purpose of this study is to evaluate the impact of extracolonic findings when screening is undertaken by CT colonography (CTC). We performed a retrospective cohort study of patients completing a screening CTC from August 2003 to June 2006 at Walter Re...

C. Maydonovitch G. R. Veerappan J. R. Choi J. S. Pak M. R. Ally

2010-01-01

88

CT demonstration of a 5th ventricle--a finding to KO boxers?  

PubMed

The reported prevalence of 5th ventricles based on air studies varies from 1-12% and ranges up to 60% as an autopsy finding. The prevalence of what is usually an incidental anomaly has not been determined by computed tomography (CT). 5th ventricles are however known to be more common in brain damaged boxers and with the introduction of compulsory CT scanning for certain boxers it is necessary to know what significance to attach to the finding of a cavum in these individuals. To ascertain the prevalence and morphology of 5th ventricles as detected by CT in the population, a thousand consecutive scans were analysed for the presence or absence of a 5th ventricle and other associated midline developmental abnormalities and correlations made with any pathology found. A 5th ventricle was present in 5.5% of the group and in most cases was less than 3 mm wide. An apparent association with other pathology was found only in patients under the age of 15. A 6th ventricle was found in 0.5% while a cavum velum interpositum was present in 9.5%. The isolated finding of a small 5th ventricle on the CT scan of a young active boxer almost certainly represents a persistent congenital anomaly of no significance. PMID:3265765

Macpherson, P; Teasdale, E

1988-01-01

89

Samonella-and Shigella-induced ileitis: CT findings in four patients  

SciTech Connect

The purpose of this study is to describe and illustrate the CT appearance of four cases of acute terminal ileitis induced by nontyphoidal Salmonella and Shigella infection and to review the radiographic and endoscopic findings of these entities. The medical records, CT examinations, and small bowel examinations of three patients with Salmonella ileitis and one patient with Shigella ileitis were retrospectively reviewed. CT examinations were done in four patients, colonoscopy in three patients, and small bowel examinations in two patients. Stool cultures established the diagnosis of nontyphoidal Salmonella enteritis in three patients and Shigella enteritis in one patient. The patients symptoms and clinical findings resolved promptly following supportive therapy and appropriate antibiotic therapy. CT showed slight circumferential and homogeneous thickening of the terminal ileum over a segment of 10-15 cm in patients with Salmonella ileitis. Associated mild thickening of the wall of the colon was present in addition. Small bowel examination performed in one patient revealed a spastic terminal ileum with thickened mucosal folds. Colonoscopy revealed acute colitis involving the colon diffusely in one case, but sparing the distal 50 cm of the colon in one case. CT showed more pronounced thickening of the terminal ileum and a target configuration in the patient with Shigella ileitis. Small bowel examination revealed narrowing, irregular contour, several large nodular defects, and a severely ulcerated mucosa affecting the terminal ileum. Colonoscopy revealed a normal colon and large ulcerations with fibro-purulent exudate in the terminal ileum. In patients with severe Salmonella or Shigella infections or persistent and/or confusing clinical presentations, CT can play a complementary but important role in the initial diagnostic evaluation. 20 refs., 2 figs.

Balthazar, E.J.; Charles, H.W.; Megibow, A.J. [New York Univ. Tisch-Bellevue Medical Center, New York, NY (United States)

1996-05-01

90

Incidental findings on positron emission tomography/CT scans performed in the investigation of lung cancer  

PubMed Central

Objectives This study aimed to clarify the number and cause of incidental findings detected on positron emission tomography (PET)/CT in patients undergoing investigation for presumed lung cancer. Methods The scan reports from PET/CT studies performed for patients with lung cancer under National Institute for Clinical Evidence guidelines from January 2006 until March 2008 were retrospectively reviewed. Incidental findings were followed up by a combination of case note review, clinician feedback, colonoscopy database, histopathology and follow-up imaging. Results 818 patients were investigated for lung cancer in the study period. 197 incidental findings were found in 175 (21%) patients. The subsequent investigation of 108 lesions confirmed a pathological correlation in 71 (66%) cases. A second primary malignancy was found in 10 patients within the bowel (6), breast (2), tongue (1) and stomach (1). A pre-malignant lesion was confirmed in 25 cases (24 large bowel tubulovillous adenomas and a follicular thyroid lesion). A further 41 (5%) benign abnormalities were detected at multiple sites; the thyroid gland was the single most frequently affected site (14 abnormalities). There were 36 (4.4%) false-positive reported findings, including 17 in the region of the pharynx and larynx and 12 within the large bowel. Conclusions Overall, 9.2% of patients with suspected or known lung cancer having PET/CT had a confirmed incidental finding. A malignant or pre-malignant lesion was found in 1.2% and 3.0%, respectively. These were mostly located within the gastrointestinal tract. The majority of false-positive incidental findings were located in the larynx and pharynx. Uptake in these regions is unlikely to be significant in the absence of a CT morphological correlation.

Chopra, A; Ford, A; De Noronha, R; Matthews, S

2012-01-01

91

Managing Incidental Findings on Abdominal and Pelvic CT and MRI, Part 2: White Paper of the ACR Incidental Findings Committee II on Vascular Findings.  

PubMed

This white paper describes vascular incidental findings found on CT and MRI of the abdomen and pelvis. Recommendations for management are included. This represents the second of 4 such papers from the ACR Incidental Findings Committee II, which used a consensus method based on repeated reviews and revisions and a collective review and interpretation of relevant literature. Topics include definitions and recommended management for abdominal aortic, iliac, splenic, renal, and visceral artery aneurysms. Other incidentally discovered aortic conditions, systemic venous anomalies, compression syndromes, abdominal venous thrombosis, and gonadal and pelvic venous conditions are also discussed. A table is provided for reference. PMID:24091049

Khosa, Faisal; Krinsky, Glenn; Macari, Michael; Yucel, E Kent; Berland, Lincoln L

2013-10-01

92

CT of an actively-hemorrhaging liver laceration in a 9-year-old child  

Microsoft Academic Search

A 9-year-old female with blunt abdominal trauma following a motor vehicle accident was referred from the Emergency Room for abdominal CT imaging. CT demonstrated the unusual and heretofore unreported finding of an actively hemorrhaging liver laceration.

C. Whitten; C. Grimes; R. Isler; M. Curci; A. Dibbins

1990-01-01

93

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

SciTech Connect

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.

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

1996-05-01

94

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

SciTech Connect

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.

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

95

Common and unusual diseases involving the iliopsoas muscle compartment: spectrum of cross-sectional imaging findings  

Microsoft Academic Search

Although relatively uncommon, many different infectious, hemorrhagic and neoplastic disease processes may involve the iliac\\u000a and psoas muscles and are increasingly diagnosed especially in referral hospitals. Furthermore, the iliopsoas compartment\\u000a may become injured during trauma, percutaneous instrumentation, laparoscopic or open surgical procedures. State-of-the-art\\u000a cross-sectional imaging including volumetric multidetector CT and multiplanar MRI acquisitions allows prompt detection, comprehensive\\u000a visualization and confident

Massimo Tonolini; Alessandro Campari; Roberto Bianco

96

Disseminated mucormycosis in haematological patients: CT and MRI findings with pathological correlation.  

PubMed

Disseminated mucormycosis is a rare, mostly fatal infectious complication in immunocompromised haematological patients. The purpose of our study was to describe the multiorgan manifestations of disseminated mucormycosis documented at CT and MRI in four patients and correlate these with the pathological findings and patient outcome. Irrespective of the site of infection, infarction or haemorrhage are the constant features of invasive mycosis. Identification of one or both of these two major imaging findings in immunocompromised patients should be regarded as an indicator of possible infection by angiotropic fungi, including the genre Mucorales. PMID:16940368

Horger, M; Hebart, H; Schimmel, H; Vogel, M; Brodoefel, H; Oechsle, K; Hahn, U; Mittelbronn, M; Bethge, W; Claussen, C D

2006-09-01

97

Prediction of intracranial findings on CT-scans by alternative modelling techniques  

PubMed Central

Background Prediction rules for intracranial traumatic findings in patients with minor head injury are designed to reduce the use of computed tomography (CT) without missing patients at risk for complications. This study investigates whether alternative modelling techniques might improve the applicability and simplicity of such prediction rules. Methods We included 3181 patients with minor head injury who had received CT scans between February 2002 and August 2004. Of these patients 243 (7.6%) had intracranial traumatic findings and 17 (0.5%) underwent neurosurgical intervention. We analyzed sensitivity, specificity and area under the ROC curve (AUC-value) to compare the performance of various modelling techniques by 10 × 10 cross-validation. The techniques included logistic regression, Bayes network, Chi-squared Automatic Interaction Detection (CHAID), neural net, support vector machines, Classification And Regression Trees (CART) and "decision list" models. Results The cross-validated performance was best for the logistic regression model (AUC 0.78), followed by the Bayes network model and the neural net model (both AUC 0.74). The other models performed poorly (AUC < 0.70). The advantage of the Bayes network model was that it provided a graphical representation of the relationships between the predictors and the outcome. Conclusions No alternative modelling technique outperformed the logistic regression model. However, the Bayes network model had a presentation format which provided more detailed insights into the structure of the prediction problem. The search for methods with good predictive performance and an attractive presentation format should continue.

2011-01-01

98

Spectrum of CT findings in rupture and impending rupture of abdominal aortic aneurysms.  

PubMed

Prompt diagnosis of rupture and impending rupture of abdominal aortic aneurysms is imperative. The computed tomographic (CT) findings of ruptured abdominal aortic aneurysms are often straightforward. Most ruptures are manifested as a retroperitoneal hematoma accompanied by an abdominal aortic aneurysm. Periaortic blood may extend into the perirenal space, the pararenal space, or both. Intraperitoneal extravasation may be an immediate or a delayed finding. Discontinuity of the aortic wall or a focal gap in otherwise continuous circumferential wall calcifications may point to the location of a rupture. There usually is a delay of several hours between the initial intramural hemorrhage and frank extravasation into the periaortic soft tissues. Contained or impending ruptures are more difficult to identify. A small amount of periaortic blood may be confused with the duodenum, perianeurysmal fibrosis, or adenopathy. Imaging features suggestive of instability or impending rupture include increased aneurysm size, a low thrombus-to-lumen ratio, and hemorrhage into a mural thrombus. A peripheral crescent-shaped area of hyperattenuation within an abdominal aortic aneurysm represents an acute intramural hemorrhage and is another CT sign of impending rupture. Draping of the posterior aspect of an aneurysmal aorta over the vertebrae is associated with a contained rupture. PMID:17374865

Rakita, Dmitry; Newatia, Amit; Hines, John J; Siegel, David N; Friedman, Barak

99

Radiologic findings in cutis laxa syndrome and unusual association with hypertrophic pyloric stenosis.  

PubMed

Cutis laxa (CL) is a rare congenital and acquired disorder characterized by loose and redundant skin with reduced elasticity. Three types of congenital cutis laxa have been recognized. Other findings are pulmonary emphysema, bronchiectasia, hernia and diverticulosis. We describe a female neonate involved by cutis laxa syndrome and a positive family history. We focus on the radiologic findings of this case such as multiple bladder diverticulosis, GI diverticulosis and very rare accompanying hypertrophic pyloric stenosis (HPS). PMID:24046787

Alehossein, Mehdi; Pourgholami, Masoud; Kamrani, Kamyar; Soltani, Mohammad; Yazdi, Afshin; Salamati, Payman

2013-05-20

100

An immunohistochemical study in cases with usual and unusual clinicopathological findings of canine visceral leishmaniosis  

Microsoft Academic Search

The present study describes pathologic findings and immunohistochemical diagnosis of canine visceral leishmaniasis (CVL) in\\u000a 22 dogs who died naturally in the Aegean region of Turkey. At necropsy, lymphadenomegaly, hepatosplenomegaly, hepatic, and\\u000a nephrosclerotic lesions were conspicuous. Histopathologically, chronic inflammatory reactions of the spleen, lymph nodes,\\u000a bone marrow, liver, and skin were marked findings. Cytological and histological examinations showed macrophages loaded

Nihat Toplu; Ahmet Aydogan

101

Three-dimensional imaging of progressive facial hemiatrophy (Parry-Romberg syndrome) with unusual conjunctival findings.  

PubMed

Progressive hemifacial atrophy, also known as Parry-Romberg syndrome, is an uncommon degenerative condition which is poorly defined. It is characterized by a slow and progressive atrophy affecting one side of the face. The onset usually occurs during the first two decades of life. Characteristically, the atrophy progresses slowly for several years, and then it becomes stable. Ophthalmic involvement is common, with progressive enophthalmos which is a frequent finding. Cutaneous pigmentation is common in such conditions, however its extension to the conjunctiva is rarely reported. We report a case of Parry Romberg syndrome with characteristic clinical and radiographic presentation accompanied with rare ocular findings. The clinical features, radiological findings, and differential diagnoses to be considered, and the available treatment options are discussed in this report. PMID:22232729

Balan, Preethi; Gogineni, Subhas Babu; Shetty, Shishir Ram; D'souza, Deepa

2011-12-19

102

Three-dimensional imaging of progressive facial hemiatrophy (Parry-Romberg syndrome) with unusual conjunctival findings  

PubMed Central

Progressive hemifacial atrophy, also known as Parry-Romberg syndrome, is an uncommon degenerative condition which is poorly defined. It is characterized by a slow and progressive atrophy affecting one side of the face. The onset usually occurs during the first two decades of life. Characteristically, the atrophy progresses slowly for several years, and then it becomes stable. Ophthalmic involvement is common, with progressive enophthalmos which is a frequent finding. Cutaneous pigmentation is common in such conditions, however its extension to the conjunctiva is rarely reported. We report a case of Parry Romberg syndrome with characteristic clinical and radiographic presentation accompanied with rare ocular findings. The clinical features, radiological findings, and differential diagnoses to be considered, and the available treatment options are discussed in this report.

Gogineni, Subhas Babu; Shetty, Shishir Ram; D'souza, Deepa

2011-01-01

103

Lateral dermoid cyst of the floor of mouth: unusual radiologic and pathologic findings.  

PubMed

A lateral dermoid cyst is a rare lesion of the floor of mouth, with only 12 cases reported in the literature. We describe the case of a 60-year-old man with a slowly enlarging mass in the submandibular region. Magnetic resonance imaging demonstrated a lesion containing multiple uniformly rounded foci, creating a "sack-of-marbles" appearance. Needle aspirations showed atypical findings, and the mass was excised. Histopathology revealed a cyst containing a keratinizing stratified squamous epithelial lining with apocrine and eccrine glands. These findings were diagnostic of a dermoid cyst, which should be considered in the differential diagnosis of any midline or lateral cervical lesion. PMID:21334151

Lin, Harrison W; Silver, Amanda L; Cunnane, Mary E; Sadow, Peter M; Kieff, David A

2011-02-21

104

An unusual finding in a peripheral blood smear of Plasmodium falciparum malaria.  

PubMed

An attack of hyperpyrexia, in a young Senegalese male resident in Rome on his return from a brief trip to Senegal, was recognized as Plasmodium falciparum malaria. In a Giemsa peripheral blood smear a merozoite cluster and haemozoin pigment were observed into a monocyte, as a phagocytosis outcome. This finding, unexpected in view of the relatively moderate severity of the disease, was likely to be expression of good immune response against the blood stages of P. falciparum. PMID:12701383

Pica, R

2002-12-01

105

Psychogenic cough in an asthmatic child: case report with unusual findings.  

PubMed

A 9-year-old girl with known mild intermittent asthma presented with a persistent cough. Her cough exhibited a four-beat staccato rhythm, was nonproductive, and persisted only while awake. On physical examination, she displayed several unique findings not previously described. An extensive yet non-diagnostic medical workup coupled with absence of aggressive medical treatment for the more usual causes of cough lead to psychologic investigation and intervention with subsequent cough resolution. The appropriate use of psychologic consultation, testing, and success with supportive reinforcement therapy confirmed a psychogenic etiology. Extended medical follow-up of the patient concerning cough reoccurrence remains uneventful. PMID:17365198

Linz, Anthony J; Daniels, Robert W; Fallon, L Fleming

106

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

PubMed Central

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.

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

2013-01-01

107

CT and MRI findings of renal infestation by a huge active hydatid cyst.  

PubMed

Hydatid cysts derived from a type of tapeworm called Echinococcus granulosis larvaes which can situate in various organs or tissues in human body. It encounters as an endemic zoonosis in many regions all over the world including eastern part of Turkey. Renal involvement of hydatid cysts is uncommon even in endemic areas. The imaging properties vary according to the phase of the disease. Although it is a benign condition, the diagnosis of a renal hydatid cyst is critical in managing treatment and complications, such as nephrectomy, medical treatment before surgery and the risk of anaphylaxis or dissemination during intervention. Herein authors reported a case of an isolated involvement of the right kidney by a huge active hydatid cyst in a young man who was treated surgically, emphasising its ultrasound, CT, contrast-enhanced MR and diffusion-weighted imaging findings. PMID:23833098

Kizildag, Betul; Dagistan, Emine; Gurel, Safiye; Alan, Cabir

2013-07-05

108

Unexpected Subdiaphragmatic Findings on CT of the Chest in Septic Patients after Cardiac Surgery  

Microsoft Academic Search

Aim: to draw the attention to upper abdominal abnormalities, which may be revealed incidentally in patients referred for a chest computed tomography (CT) after cardiac surgery. MATERIALS AND METHODS: We reviewed prospectively and retrospectively the CT results of all patients referred for a chest CT, with suspected sternal infection or for other reasons, after cardiac surgery, to assess possible upper

Sara Apter; Gabriel Amir; Michael Taler; Gabriela Gayer; Joseph Kuriansky; Michal Amitai; Aram Kurtz Smolinsky; Marjorie Hertz

2002-01-01

109

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

PubMed

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

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

2013-06-01

110

Unusual MRI findings of dural arteriovenous fistula: Isolated perfusion lesions mimicking TIA  

PubMed Central

Background The diagnosis of transient ischemic attack (TIA) based on clinical history and objective findings, even including multiparametric MRI, can be misleading. We report two patients who presented with TIA-like deficits with isolated perfusion lesions in corresponding areas but were finally diagnosed as transient neurological symptoms associated with dural arteriovenous fistula (dAVF). Case presentation Two patients presented with transient focal neurological symptoms lasting less than one hour. An isolated perfusion deficit with no diffusion change in the clinically relevant area was shown on brain MRI, indicating transient ischemia as the most plausible cause of neurological symptoms. However, cerebral angiography let to diagnosis of dAVF in both cases. Intracerebral hemorrhage occurred after the initial diagnosis of TIA in one patient, and the small area of perfusion abnormality accompanied by the enlarged cortical vein in the other case helped to identify the dAVF through the further investigation. The pattern of perfusion-weighted imaging in both cases revealed increase of mean transit time and relative cerebral blood volume denoting the venous congestion in a clinically corresponding area. Conclusion Reported cases are uncommon clinical presentation of a dAVF, which can be misdiagnosed as TIA on clinical grounds. In rare cases, the isolated perfusion deficits could be attributable to venous congestion, despite the similar pattern of clinical presentation, such as with TIA.

2012-01-01

111

Hepatic trauma: CT findings and considerations based on our experience in emergency diagnostic imaging.  

PubMed

Abdominal blunt trauma represents the main cause of death in people of age less than 40 years; the liver injury occurs frequently, with an incidence varying from 3 to 10%. Isolated hepatic lesions are rare and in 77-90% of cases, lesions of other organs and viscera are involved. Right hepatic lobe is a frequent site of injury, because it is the more voluminous portion of liver parenchyma; posterior superior hepatic segments are proximal to fixed anatomical structures such as ribs and spine that may have an important role in determining of the lesion. The coronal ligaments' insertion in this parenchymal region augments the effect of acceleration-deceleration mechanism. Associated lesions usually are homolateral costal fractures, laceration or contusion of the inferior right pulmonary lobe, haemothorax, pneumothorax, renal and/or adrenal lesions. Traumatic lesions of left hepatic lobe are rare and usually associated with direct impact on the superior abdomen, such as in car-crash when the wheel causes a compressive effect on thorax and abdomen. Associated lesions to left hepatic lobe injuries correlated to this mechanism are: sternal fractures, pancreatic, myocardial, gastrointestinal tract injuries. Lesions of the caudal lobe are extremely rare, usually not isolated and noted with other large parenchymal lesions. The Institution of Specialized Trauma Centers and the technical progress in imaging methodology developed in the last years a great reduction of mortality. New diagnostic methodologies allow a reduction of negatives laparotomies and allow the possibility of conservative treatment of numerous traumatic lesions; however, therapy depends from imaging findings and clinical conditions of the patient. Computed tomography (CT) certainly presents a large impact on diagnosis and management of patients with lesions from blunt abdominal traumas. It is important to establish a prognostic criteria allowing decisions for conservative or surgical treatment; CT findings and peritoneal fluid evaluation may be used to make a first differentiation of severity of lesions, but haemodynamic parameters may help the clinician to prefer a conservative treatment. In emergency based hospitals and also in our experience, positive benefits spring from diagnostic accuracy and consequent correct therapeutic management. PMID:15093236

Romano, Luigia; Giovine, Sabrina; Guidi, Guido; Tortora, Giovanni; Cinque, Teresa; Romano, Stefania

2004-04-01

112

Clinically Unsuspected Venous Malformations Limited to the Submandibular Triangle: CT Findings  

Microsoft Academic Search

PURPOSE: To present the CT characteristics of histologically confirmed venous vascular malfor- mations limited to the submandibular triangle in patients without clinical stigmata of venous vascular malformations. METHODS: The clinical records and CT scans of five women with venous vascular malformations limited to the submandibular triangle were reviewed. Patients ranged from 39 to 70 years of age. None of the

Martin J. Fine; Roy A. Holliday; J. Thomas Roland

1995-01-01

113

Non-Hodgkin Lymphoma of the Larynx: CT and MR Imaging Findings  

Microsoft Academic Search

BACKGROUND AND PURPOSE: Non-Hodgkin lymphoma (NHL) of the larynx is a rare tumor. The aim of this study was to report the CT and MR features of laryngeal NHL in four patients to determine if there are any features that might be helpful to distinguish NHL from other laryngeal tumors. METHODS: The CT and MR images of four patients with

Ann D. King; Edmund H. Y. Yuen; Kenny I. K. Lei; Anil T. Ahuja; Andrew van Hasselt

114

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

PubMed

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

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

2013-03-30

115

Primary Endobronchial Marginal Zone B-Cell Lymphoma of Bronchus-Associated Lymphoid Tissue: CT Findings in 7 Patients  

PubMed Central

Objective To investigate CT and 18F-flurodeoxyglucose (18F-FDG) positron-emission tomography/CT findings of primary endobronchial marginal zone B-cell lymphoma of the bronchus-associated lymphoid tissue (BALT). Materials and Methods From June 2006 through April 2012, seven patients (six female, one male; age range, 21-61 years; mean age, 49 years) were examined who were pathologically diagnosed with the primary endobronchial marginal zone B-cell lymphoma of BALT. We evaluated the locations and characteristics of the lesions on CT and 18F-FDG-PET/CT scans. The lesions were classified into the following three patterns: 1) solitary intraluminal nodule; 2) several tiny nodular protrusions; and 3) diffuse wall thickening. Results A solitary intraluminal nodule was observed in four patients (57.1%), several tiny nodular protrusion in two patients (28.6%), and diffuse wall thickening in one patient (14.3%). The lesions were categorized into 3 major locations: confined to the trachea (n = 3), confined to the lobar bronchus (n = 2), and diffuse involvement of the trachea and both main bronchi (n = 2). All lesions demonstrated homogeneous iso-attenuation as compared with muscle on pre- and post-enhancement scans. Secondary findings in the lungs (n = 3; 42.9%) included postobstructive lobar atelectasis (n = 1), air trapping (n = 1), and pneumonia (n = 1). On 18F-FDG-PET/CT (n = 5), 4 lesions showed homogeneous uptake with maximum standardized uptake values (mSUV), ranging 2.3-5.7 (mean mSUV: 3.3). One lesion showed little FDG uptake. Conclusion Primary endobronchial marginal zone B-cell lymphoma of the BALT manifests as three distinct patterns on CT, with the solitary intraluminal nodule presenting as the main pattern. Most lesions demonstrate homogeneous but weak FDG uptake on 18F-FDG-PET/CT.

Yoon, Ra Gyoung; Song, Jae Woo; Chae, Eun Jin; Choi, Chang Min; Jang, SeJin

2013-01-01

116

Discrimination of gangrenous from uncomplicated acute cholecystitis: accuracy of CT findings.  

PubMed

In acute cholecystitis, the presence of gangrene is associated with higher morbidity and mortality and necessitates open surgical intervention rather than laparoscopic cholecystectomy. As Murphy's sign may be absent, gangrene may not be detected ultrasonographically. This retrospective study evaluated indications of acute gangrenous cholecystitis on computed tomography (CT) in 25 patients, who were proven as having acute cholecysitis surgically and pathologically within 3 days of pre-operative CT. The CT images were reviewed by two board-certified radiologists blind to the initial CT report. Acute gangrenous cholecystitis was significantly correlated with the CT signs of perfusion defect (PD) of the gallbladder wall (P = 0.02), pericholecystic stranding (PS) (P = 0.028), and no-gallstone condition (No-ST) (P = 0.026). The presence of PD was associated with acute gangrenous cholecystitis with a relatively high accuracy (80%), a sensitivity of 70.6%, a specificity of 100%, a positive predictive value (PPV) of 100%, and a negative predictive value (NPV) of 61.5%. The combination CT signs of PD or No-ST improved the accuracy for acute gangrenous cholecystitis to 92%, with a sensitivity, specificity, PPV, and NPV of 88.2%, 100%, 100%, and 80%, respectively. Other CT signs were highly specific for acute gangrenous cholecystitis but of low sensitivity, including mucosal hemorrhage, mucosal sloughing, wall irregularity, pericholecystic abscess, gas formation, and portal venous thrombosis. CT was found to accurately diagnose acute cholecystitis, with the presence of PD, PS, or No-ST significantly correlated with that of gangrenous change. Thus, CT is useful in the preoperative detection of acute gangrenous cholecystitis. PMID:20425109

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

2011-04-01

117

Incidental Finding of Anterior Cranial Fossa Meningioma on 18F-Fluoride PET/CT.  

PubMed

The association of breast carcinoma and meningioma has been described. We report a case of anterior cranial fossa meningioma in a woman with breast cancer detected by F-fluoride PET/CT. The whole-body F-fluoride PET images demonstrate an intense intracranial focal radiotracer accumulation in the skull base. Simultaneous CT showed a corresponding calcified space-occupying lesion consistent with meningioma. Follow-up CT image obtained 8 months later demonstrated the persistence and stable appearance of the lesion. PMID:24096998

Zacchi, Samara Riguete; Duarte, Paulo Schiavon; Coura Filho, George Barberio; Sapienza, Marcelo Tatit; Buchpiguel, Carlos Alberto

2013-11-01

118

Airway Remodelling in Asthma and COPD: Findings, Similarities, and Differences Using Quantitative CT.  

PubMed

Airway remodelling is a well-established feature in asthma and chronic obstructive lung disease (COPD), secondary to chronic airway inflammation. The structural changes found on pathological examination of remodelled airway wall have been shown to display similarities but also differences. Computed tomography (CT) is today a remarkable tool to assess airway wall morphology in vivo since submillimetric acquisitions over the whole lung volume could be obtained allowing 3D evaluation. Recently, CT-derived indices extracted from CT images have been described and are thought to assess airway remodelling. This may help understand the complex mechanism underlying the remodelling process, which is still not fully understood. This paper summarizes the various methods described to quantify airway remodelling in asthma and COPD using CT, and similarities and differences between both diseases will be emphasized. PMID:22448324

Dournes, Gaël; Laurent, François

2012-02-16

119

Malignant myoepithelioma arising in salivary tissue on the masseter muscle: US, CT, and MR findings  

SciTech Connect

We report the US, CT, and MR appearances of a malignant myoepithelioma arising on the masseter muscle from aberrant salivary tissue, associated with postobstructive atrophy of the main parotid gland. 13 refs., 4 figs.

Martinoli, C.; Cittadini, G.; Derchi, L.E.; Rollandi, G.A. [Univ. of Genoa (Italy)] [and others

1996-01-01

120

Infantile Fibromatosis of the Neck with Intracranial Involvement: MR and CT Findings  

Microsoft Academic Search

Summary: CT and MR imaging studies were performed in a 3-year-old boy with infantile fibromatosis arising from the infratemporal fossa and extending into the middle cranial fossa. On CT scans, the lesion was hyperattenuating (44-49 Hounsfield units (HU)), enhancing significantly after appli- cation of contrast material (63-66 HU). The MR images showed a multilobulated lesion of heterogeneous signal in- tensity.

Sebastian Flacke; Dirk Pauleit; Ewald Keller; Giesela Knoepfle; Jochen Textor; Claudia Leutner; Hans H. Schild

121

Radiographic and CT findings of blunt chest trauma: aortic injuries and looking beyond them.  

PubMed

Increasingly, helical CT is being used to screen trauma patients for aortic injury. Most aortic injuries visible at CT occur at or near the level of the ligamentum arteriosus; these injuries manifest as mediastinal hematoma, aortic contour deformity, intimal flaps, intraluminal debris, pseudoaneurysm, and pseudocoarctation. In the process of searching for aortic injury, however, the radiologist should not overlook other serious and more common thoracic injuries. Tracheobronchial tears appear at CT and radiography with persistent pneumothorax, subcutaneous emphysema, "fallen lung" sign, and malposition of endotracheal tube. The ruptured diaphragm, which tears more often on the left, appears asymmetric, irregular, or discontinuous, with herniation of bowel or viscera into the chest. In esophageal rupture, CT and radiography demonstrate left pneumothorax, pneumomediastinum, subcutaneous emphysema, and pleural effusion and atelectasis on the left. CT is better than trauma radiography for depicting fractures of the thoracic vertebral bodies and ribs, as well as for revealing pulmonary contusions and lacerations. CT is also useful for demonstrating unsuspected injuries caused by seat belts. Observation of these injuries should prompt a search for other serious internal organ injuries. PMID:9747609

Kuhlman, J E; Pozniak, M A; Collins, J; Knisely, B L

122

Prognostic Impact of 18FDG-PET-CT Findings in Clinical Stage III and IIB Breast Cancer  

PubMed Central

Background This study prospectively evaluated the yield of fluorodeoxyglucose positron emission tomography/computed tomography (18FDG-PET-CT) in patients with clinical stages II and III breast cancer and the impact of PET-CT results on prognosis. Methods In the course of 71 months, 254 consecutive patients with clinical stages II and III breast cancer (based on clinical examination, mammography, breast magnetic resonance imaging, and locoregional ultrasonography) underwent 18FDG-PET-CT. The yield was assessed in the whole population and for each American Joint Committee on Cancer subgroup. The prognostic impact of PET-CT findings was analyzed. Tests of statistical significance were two-sided. Results 18FDG-PET-CT changed the clinical stage in 77 of 254 patients (30.3%; 95% confidence interval [CI] = 25.0% to 36.2%). It showed unsuspected N3 disease (infraclavicular, supraclavicular, or internal mammary nodes) in 40 patients and distant metastases in 53. PET-CT revealed distant metastases in 2.3% (1 of 44) of clinical stage IIA, 10.7% (6 of 56) of stage IIB, 17.5% (11 of 63) of stage IIIA, 36.5% (27 of 74) of stage IIIB, and 47.1% (8 of 17) of stage IIIC patients. Among 189 patients with clinical stage IIB or higher disease and adequate follow-up, disease-specific survival was statistically significantly shorter in the 47 patients scored M1 on 18FDG-PET-CT in comparison with those scored M0, with a three-year disease-specific survival of 57% vs 88% (P < .001). In multivariable analysis, only distant disease on PET-CT and triple-negative phenotype were statistically significant prognostic factors. The relative risk of death was 26.60 (95% CI = 6.60 to 102.62) for M1 vs M0 patients. Conclusions The yield of 18FDG-PET-CT appeared substantial in patients with clinical stage IIB or higher breast cancer. In these patients, 18FDG-PET-CT provided powerful prognostic stratification.

2012-01-01

123

CT Imaging Findings of Ruptured Ovarian Endometriotic Cysts: Emphasis on the Differential Diagnosis with Ruptured Ovarian Functional Cysts  

PubMed Central

Objective The purpose of this study is to assess the prevalence of abnormal CT findings in patients with surgically proven ruptured endometriotic cysts, as compared with those abnormal CT findings of ruptured ovarian functional cysts. Materials and Methods This study included 13 retrospectively identified patients with surgically confirmed ruptured ovarian endometriotic cysts and who had also undergone preoperative CT scanning during the previous seven years. As a comparative group, 25 cases of surgically confirmed ruptured ovarian functional cysts were included. We assessed the morphologic features of the cysts and the ancillary findings based on CT. Results For the endometriotic cysts, the mean maximum cyst diameter was significantly larger than that of the functional cysts (70.1 mm versus 36.4 mm, respectively, p < 0.05). The endometriotic cysts frequently had a multilocular shape and a thicker cyst wall, as compared to that of functional cysts, and these differences were statistically significant. Among the ancillary findings, endometriotic cysts showed a significantly higher prevalence of loculated ascites, ascites confined to the pelvic cavity without extension to the upper abdomen, and peritoneal strandings and infiltrations (p < 0.05). Although 11 of the 25 cases of functional cysts showed active extravasation of contrast material at the ovarian bleeding site, only one of 13 cases of endometriotic cysts showed active extravasation. Conclusion The diagnosis of ruptured endometriotic cyst should be suspected for a woman in whom CT reveals the presence of multilocular or bilateral ovarian cysts with a thick wall and loculated ascites confined to the pelvic cavity with pelvic fat infiltrations.

2011-01-01

124

[The findings of computed tomography (CT) and magnetic resonance imaging (MRI) in pulmonary arterial hypertension].  

PubMed

Technical advances of multidetector-row computed tomography(MDCT) and magnetic resonance imaging(MRI) made these modalities more important in the evaluation and for differential diagnosis of pulmonary arterial hypertension (PAH). The advantages of CT and MRI are noninvasive examination, wide field of view, excellent reproducibility, high spatial resolution and 3-dimensional (3-D) reconstruction images. Morphological changes of the PAH, which are right ventricular hypertrophy and dilatation of main and central pulmonary artery(PA), right ventricle, right atria, superior and inferior vena cava, and coronary sinus, are depicted well by these modalities. The 3-D CT and MR angiography can depict peripheral and central PA, and pulmonary veins, which are important information of the cause of PAH. Myocardial changes of PAH can be detected by gadolinium delayed enhancement of MRI. CT and MRI are promising method to diagnose and manage the PAH in future. PMID:19051729

Koito, Hitoshi

2008-11-01

125

Sclerosing angiomatoid nodular transformation of the spleen: CT, MR, PET, and ??(m)Tc-sulfur colloid SPECT CT findings with gross and histopathological correlation.  

PubMed

Sclerosing angiomatoid nodular transformation (SANT) is a benign, proliferative vascular lesion affecting the spleen. Few reports detailing the cross sectional and PET appearance of this lesion are available, and the lesion's behavior with ??(m)Tc-sulfur colloid scintigraphy is previously unreported. Sclerosing nodular transformation of the spleen shows increased tracer accumulation on positron emission tomography, and a central scar-like appearance with an enhancing capsule and radiating septae on CT and MR studies that reflects the gross and histopathological features of the lesion may be visible. An understanding of this pathological finding may allow prospective recognition of the sclerosing nodular transformation of the spleen on cross sectional imaging studies. PMID:19862569

Thacker, Curtis; Korn, Ronald; Millstine, John; Harvin, Howard; Van Lier Ribbink, Jeffrey A; Gotway, Michael B

2010-12-01

126

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

PubMed Central

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.

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

127

Post-Pancreaticoduodenectomy Hemorrhage of Unusual Origin: Treatment with Endovascular Embolization and the value of preoperative CT Angiography  

PubMed Central

Post-pancreaticoduodenectomy hemorrhage is a life threatening complication reported to occur in 2–7% of patients. Historically, treatment required an exploratory laparotomy. Introduction of endovascular embolization has broadened the available treatment options. The most common location for a post-pancreaticoduodenectomy hemorrhage is the gastroduodenal artery stump. Nonetheless, unusual sources of hemorrhage exist and are hard to localize, thus they are often treated with open surgery. Here we report two cases of CTA proven hemorrhage from the dorsal pancreatic arcade and transverse pancreatic artery, which were successfully located with conventional angiography and treated with endovascular arterial coil embolization. Both patients were status post-pancreaticoduodenectomy (Whipple procedure) and presented with a sentinel bleed and a drop in hematocrit levels.

Robinson, Kortney; Rajebi, Mohammad Reza; Zimmerman, Nicole; Zeinati, Chadi

2013-01-01

128

Post-pancreaticoduodenectomy hemorrhage of unusual origin: treatment with endovascular embolization and the value of preoperative CT angiography.  

PubMed

Post-pancreaticoduodenectomy hemorrhage is a life threatening complication reported to occur in 2-7% of patients. Historically, treatment required an exploratory laparotomy. Introduction of endovascular embolization has broadened the available treatment options. The most common location for a post-pancreaticoduodenectomy hemorrhage is the gastroduodenal artery stump. Nonetheless, unusual sources of hemorrhage exist and are hard to localize, thus they are often treated with open surgery. Here we report two cases of CTA proven hemorrhage from the dorsal pancreatic arcade and transverse pancreatic artery, which were successfully located with conventional angiography and treated with endovascular arterial coil embolization. Both patients were status post-pancreaticoduodenectomy (Whipple procedure) and presented with a sentinel bleed and a drop in hematocrit levels. PMID:23705050

Robinson, Kortney; Rajebi, Mohammad Reza; Zimmerman, Nicole; Zeinati, Chadi

2013-04-01

129

Gastric volvulus associated with congenital diaphragmatic hernia, wandering spleen, and intrathoracic left kidney: CT findings  

Microsoft Academic Search

We present an unusual case of gastric volvulus associated with wandering spleen, a delayed manifestation of congenital diaphragmatic\\u000a hernia and left intrathoracic kidney. Gastric volvulus should be considered in any infant with unexplained vomiting and left\\u000a diaphragmatic anomaly: in these patients, developmental disorders of the peritoneal visceral attachments of the left upper\\u000a abdomen may coexist. The absence of ligamentous connections

G. Pelizzo; M. A. Lembo; A. Franchella; A. Giombi; F. D'Agostino; S. Sala

2001-01-01

130

Intraosseous pneumatocysts of the ilium: findings on radiographs and CT scans  

SciTech Connect

CT scans demonstrated a localized collection of gas adjacent to a normal sacroiliac joint in 5 patients. In each case the lesion was sharply demarcated by a thin sclerotic rim. A benign bone cyst was confirmed histologically in 2 cases. The radiologist should be aware of this appearance so as to avoid invasive procedures based on a misdiagnosis of infection or neoplasm.

Ramirez, H.; Blatt, E.S.; Cable, H.F.; McComb, B.L.; Zornoza, J.; Hibri, N.S.

1984-02-01

131

The hyperdense choroid plexus: A CT finding associated with aortic arch obstruction in the newborn  

Microsoft Academic Search

We report the first observation of choroid plexus hyperdensity depicted by CT in two newborns with aortic arch obstruction. Neither infant had intracranial hemorrhage or infarction demonstrated by autopsy or cranial ultrasonography. Although not proven, we believe that such hyperdensity in these two cases represents abnormal vascularity within the choroid plexus related to upper extremity hypertension.

J. C. Rand; E. M. Burton; I. L. D. Tonkin; T. G. DiSessa

1990-01-01

132

Masticator Space Abnormalities Associated with Mandibular Osteoradionecrosis: MR and CT Findings in Five Patients  

Microsoft Academic Search

BACKGROUND AND PURPOSE:Imaging of patients with a clinical diagnosis of mandibular osteoradionecrosis (ORN) is often performed to support that clinical suspicion, evaluate the extent of the disease, or exclude coexistent tumor recurrence. The purpose of our study was to describe the clinical, MR imaging, and CT features of five patients with mandibular ORN associated with prominent soft-tissue abnormality in the

June Chong; Lisa K. Hinckley; Lawrence E. Ginsberg

133

Intracranial Abnormalities in Infants Treated with Extracorporeal Membrane Oxygenation: Update on Sonographic and CT Findings  

Microsoft Academic Search

PURPOSE:To determine the frequency of intracranial lesions in infants treated with extracorporeal membrane oxygenation (ECMO), to evaluate trends in frequency during an 8-year period, and to determine which infants are at highest risk for intracranial injury. METHODS: Daily sonograms were obtained in 386 infants during treatment with ECMO. Cranial CT scans were acquired after decannulation in 286 of 322 survivors.

Dorothy I. Bulas; George A. Taylor; Regina M. O'Donnell; Billie Lou Short; Charles R. Fitz; Gilbert Vezina

134

CT abnormalities in right lower quadrant inflammatory disease: Review of findings in 26 adults  

Microsoft Academic Search

Abnormal abdominal computed tomographic (CT) examinations, performed on 26 adults who presented with clinical evidence of right lower quadrant inflammatory disease, were retrospectively studied. Final diagnoses, established surgically in each case, included complicated appendicitis (15 patients), diverticulitis of the ileum or right colon (4), previously undiagnosed Crohn's disease (3), perforated cecal neoplasm (2), right tuboovarian abscess (1), and paracolic abscess

John C. Scatarige; David M. Yousem; Elliot K. Fishman; Bronwyn Jones; Stanley S. Siegelman

1987-01-01

135

Giant Infiltrating Lipoma of the Face: CT and MR Imaging Findings  

Microsoft Academic Search

Summary: Infiltrating lipoma is an uncommon mesenchy- mal neoplasm that characteristically infiltrates adjacent tissues and tends to recur after excision. This type of lipoma is extremely rare in the head and neck region. We report a case of a giant infiltrating lipoma of the face, studied with CT and MR imaging. Lipomas are one of the most common soft-tissue mesenchymal

Cappabianca Salvatore; Barberi Antonio; Walter Del Vecchio; Antonio Lanza; GianPaolo Tartaro; Colella Giuseppe

136

Inflammatory myofibroblastic tumour of the maxillary sinus: CT appearance, clinical and pathological findings  

Microsoft Academic Search

Inflammatory myofibroblastic tumor (IMT) is a very rare neoplasm. Many aspects of this tumor have not been fully elucidated including their imaging characteristics. To the best of our knowledge, less than 10 cases of IMT of the maxillary sinus have been reported mainly concerning the CT features. Herein we present three cases of pathologically proved IMT originated in the maxillary

Songhua Fang; Danjun Dong; Mei Jin

2006-01-01

137

[Desmoplastic small round cell tumor of the abdomen: CT findings and radiologic-pathologic correlation in 3 cases].  

PubMed

We describe the CT findings of abdominal desmoplastic small round cell tumor (DSRCT) in three patients. The most common imaging finding was the presence of single or multiple soft-tissue density intraperitoneal masses without apparent origin in an abdominal organ. In the first patient, a single peritoneal mass was located in the mesentery between the stomach and pancreas. In the second patient, an intraperitoneal pelvic mass was seen in the retrovesical space. In the third patient, a large homogeneous soft-tissue mass that nearly filled the entire peritoneal space was found. Two patients had multiple liver metastases and adenopathies at the time of diagnosis. The diagnosis was confirmed with CT-guided percutaneous biopsies in all three cases. DSRCT should be suspected in young men with multiple bulky heterogeneous soft-tissue masses. PMID:19298986

Eiriz Martínez, S; Conceiçăo E Silva, J P

2009-03-18

138

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...

139

Thymic epithelial tumors: Comparison of CT and MR imaging findings of low-risk thymomas, high-risk thymomas, and thymic carcinomas  

Microsoft Academic Search

ObjectiveTo assess the CT and magnetic resonance (MR) imaging findings of thymic epithelial tumors classified according to the current World Health Organization (WHO) histologic classification and to determine useful findings in differentiating the main subtypes.

Junko Sadohara; Kiminori Fujimoto; Nestor L. Müller; Seiya Kato; Shinzo Takamori; Kazuaki Ohkuma; Hiroshi Terasaki; Naofumi Hayabuchi

2006-01-01

140

18F-fluorodeoxyglucose PET/CT findings of a solitary primary hepatic lymphoma: A case report  

PubMed Central

Primary hepatic lymphoma is extremely rare, and only a few cases have been described on positron emission tomography (PET) or PET/computed tomography (PET/CT) imaging in the English literature. We report a case of a 55-year-old woman who presented with low-grade fever and weight loss of three months. On CT scanning, a mass was identified which appeared to be a hypoattenuating lesion, on ultrasonographic imaging, the mass was hypoechoic, therefore, liver abscess or hepatic metastasis from a gastrointestinal primary was initially suspected. Tumor markers such as alpha-fetoprotein, carcinoembryonic antigen and carbohydrate antigen 19-9 were within normal limits. PET/CT demonstrated a large abnormal ring-like hypermetabolic focus in the right liver lobe. The lesion was resected and the histopathological findings were consistent with lymphoma. The patient was discharged two weeks after surgery and did not receive any further treatment. After 25 mo follow-up, she is in good health. 18F-fluorodeoxyglucose PET/CT is useful in confirming the diagnosis of primary hepatic lymphoma by demonstrating no other foci with high uptake in other parts of the body.

Pan, Bo; Wang, Cun-Shi; Han, Jian-Kui; Zhan, Lin-Feng; Ni, Ming; Xu, Shi-Cheng

2012-01-01

141

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

SciTech Connect

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.

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

142

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

SciTech Connect

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.

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

1994-09-01

143

A case of subfascial lipoma in the lateral space of neck: US and CT findings  

PubMed Central

Lipomas in the head and neck region usually occur in the immediate subcutaneous tissue. They are extremely rare under the muscular band of neck. We present a case of a 53-year-old woman with a subfascial lipoma located in the anterior lateral space of neck. The diagnosis of the lesion was reached by clinical examination and confirmed by ultrasonography (US) and computed tomography (CT) imaging. The lesion with surrounding capsule formation and lipofibromatous changes underwent open surgery.

Onesti, M.G.; Maruccia, M.; Malpassini, F.; Olive, M.; Medevedeyeva, E.; Guerrisi, I.; Di Segni, M.; Maldur, V.; Dessy, L.A.

2009-01-01

144

A case of subfascial lipoma in the lateral space of neck: US and CT findings.  

PubMed

Lipomas in the head and neck region usually occur in the immediate subcutaneous tissue. They are extremely rare under the muscular band of neck. We present a case of a 53-year-old woman with a subfascial lipoma located in the anterior lateral space of neck. The diagnosis of the lesion was reached by clinical examination and confirmed by ultrasonography (US) and computed tomography (CT) imaging. The lesion with surrounding capsule formation and lipofibromatous changes underwent open surgery. PMID:23396802

Onesti, M G; Maruccia, M; Malpassini, F; Olive, M; Medevedeyeva, E; Guerrisi, I; Di Segni, M; Maldur, V; Dessy, L A

2009-11-12

145

Postmortem CT findings of “gastromalacia”: a trap for the radiologist with forensic interest  

Microsoft Academic Search

Autolytic rupture of the stomach, so called gastromalacia, is a well recognized artifact at autopsy. A 50 year old Asian woman\\u000a with a past history of alcoholism, head injury and posttraumatic epilepsy was found deceased at home following a 12 h period\\u000a of feeling unwell, seizures and vomiting. Postmortem CT images of the abdomen showed free gas in the peritoneal cavity adjacent

Christopher J. O’Donnell; Melissa A. Baker

2010-01-01

146

Diagnostic CT scan findings in an adult case of acute disseminated leuco-encephalitis  

Microsoft Academic Search

A complex neurological syndrome, which rapidly appeared in a 54-year-old woman, created strong diagnostic difficulties. In fact, while the carotid-angiography was negative and CSF not significant, the scintigraphy suggested a multifocal metastatic or infarctual pathology. The CT scan easily allowed us to resolve the diagnostic problem, showing in the oval centres numerous enhanced areas which were consistent with a disseminated

F. Barontini; D. Sifft; A. Nori

1981-01-01

147

A Case of Probable Mixed-Infection with Clonorchis sinensis and Fasciola sp.: CT and Parasitological Findings  

PubMed Central

We report here a human case probably mixed-infected with Clonorchis sinensis and Fasciola sp. who was diagnosed by computed tomography (CT) scan, serological findings, and/or fecal examination. The patient was a 43-year-old Korean female and was admitted to Kyung Hee University Hospital with the complaints of fever and abdominal pain. On admission, marked eosinophilia was noted in her peripheral blood. CT scan showed specific lesions for clonorchiasis and fascioliasis in the liver, along with lesions suggestive of amebic abscess. Micro-ELISA revealed positive results for the 2 helminthic infections. Eggs of C. sinensis and trophozoites of Entamoeba histolytica were observed in the stool. Treatment with praziquantel followed by metronidazole and tinidazole reduced abnormalities in the liver and eosinophilia. This is the first case report of a possible co-infection with 2 kinds of liver flukes in the Republic of Korea.

Kim, Tae Yun; Lee, Yun-Sik; Yun, Ji Hye; Kim, Jeong Ju; Choi, Won Hyung; Oh, In Hwan; Song, Hyun Ouk

2010-01-01

148

Uterine cavernous haemangioma in a post-menopausal woman: CT and MRI findings mimicking uterine myoma with degeneration  

PubMed Central

Cavernous haemangioma is a very rare vascular malformation of the uterus. We describe the CT and MRI findings of a cavernous haemangioma in an 81-year-old female with recurrent menorrhagia. CT showed a well-marginated mass with multifocal calcifications and extensive haemorrhage, as well as necrosis in the anterior wall of the uterus. MRI revealed heterogeneous low- to high-signal intensities of the mass on T1 and T2 weighted images as well as portions with poor enhancement of the mass on contrast-enhanced T1 weighted images. Although rare, cavernous haemangioma should be included in the differential diagnosis of a calcified haemorrhagic necrotic uterine mass in post-menopausal women.

Lee, E J; Kim, S H; Kim, Y H

2011-01-01

149

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

PubMed Central

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.

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

2013-01-01

150

Uterus-like mass involving the appendix: US and CT findings.  

PubMed

Uterus-like mass is a rare extrauterine mass composed of a central cavity lined by endometrium and surrounding smooth muscle. Uterus-like mass has frequently been reported in the ovary, but has rarely been found in extraovarian regions. We report a case of uterus-like mass involving the appendix in a woman who presented with right lower abdominal pain indistinguishable from acute appendicitis. Sonography revealed a heterogeneous mass of mixed echogenicity with inner cystic change, abutting the appendix. CT depicted an enhanced mass with inner cystic change abutting the appendix. Histopathologic examination confirmed the diagnosis. PMID:22806205

Kim, Hyun Cheol; Yang, Dal Mo; Kim, Sang Won; Kim, Gou Young; Choi, Sung Il; Park, Seong Jin

2012-07-14

151

Sclerosing angiomatoid nodular transformation of the spleen: CT, MR, PET, and 99mTc-sulfur colloid SPECT CT findings with gross and histopathological correlation  

PubMed Central

Sclerosing angiomatoid nodular transformation (SANT) is a benign, proliferative vascular lesion affecting the spleen. Few reports detailing the cross sectional and PET appearance of this lesion are available, and the lesion’s behavior with 99mTc-sulfur colloid scintigraphy is previously unreported. Sclerosing nodular transformation of the spleen shows increased tracer accumulation on positron emission tomography, and a central scar-like appearance with an enhancing capsule and radiating septae on CT and MR studies that reflects the gross and histopathological features of the lesion may be visible. An understanding of this pathological finding may allow prospective recognition of the sclerosing nodular transformation of the spleen on cross sectional imaging studies.

Thacker, Curtis; Korn, Ronald; Millstine, John; Harvin, Howard; Van Lier Ribbink, Jeffrey A.

2009-01-01

152

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

SciTech Connect

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.

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

2004-09-15

153

Mediastinal histoplasmosis: F-18 FDG PET and CT findings simulating malignant disease.  

PubMed

We describe the computed tomography and F-18 FDG PET findings of a patient with extensive mediastinal nodal enlargement resulting from histoplasmosis. This patient with known metastatic melanoma presenting for restaging was initially considered to have widespread mediastinal and cervical metastases on the basis of the imaging findings. Bronchoalveolar lavage fluid and transbronchial lymph node biopsy were consistent with histoplasmosis. The imaging findings improved after treatment with antifungal medication. A relatively small area of pulmonary involvement proved to be the clue in the imaging studies that the disease was inflammatory rather than neoplastic. PMID:16100491

Mackie, Gavin C; Pohlen, Judith M

2005-09-01

154

Characteristics of false positive findings in CT colonography CAD: a comparison of two fecal tagging regimens  

NASA Astrophysics Data System (ADS)

The successful application of Computer Aided Detection schemes to CT Colonography depends not only on their performances in terms of sensitivity and specificity, but also on the interaction with the radiologist, and thus ultimately on factors such as the nature of CAD prompts and the reading paradigm. Fecal tagging is emerging as a widely accepted technique for patient preparation, and patient-friendlier schemes are being proposed in an effort to increase compliance to screening programs; the interaction between CAD and FT regimens should likewise be taken into account. In this scenario, an analysis of the characteristics of CAD prompts is of paramount importance in order to guide further research, both from clinical and technical viewpoints. The CAD scheme analyzed in this paper is essentially composed of five steps: electronic cleansing, colon surface extraction, polyp candidate segmentation, pre-filtering of residual tagged stool and classification of the generated candidates in true polyps vs. false alarms. False positives were divided into six categories: untagged and tagged solid stool, haustral folds, extra-colonic candidates, ileocecal valve and cleansing artifacts. A full cathartic preparation was compared with a semi-cathartic regimen with sameday fecal tagging, which is characterized by higher patient acceptance but also higher inhomogeneity. The distribution of false positives at segmentation reflects the quality of preparation, as more inhomogeneous tagging results in a higher number of untagged solid stool and cleansing artifacts.

Morra, Lia; Delsanto, Silvia; Agliozzo, Silvano; Baggio, Riccardo; Belluccio, Erika; Correale, Loredana; Genova, Dario; Bert, Alberto; Regge, Daniele

2009-02-01

155

Expiratory CT scan in patients with normal inspiratory CT scan: a finding of obliterative bronchiolitis and other causes of bronchiolar obstruction.  

PubMed

Expiratory CT scan is usually obtained as supplement to normal inspiratory CT scan to recognize air-trapping, which is expression of small airways obstruction. In some patients the air-trapping may be the only sign of an early-stage small airways disease in an otherwise normal lung.The purpose of this article is to illustrate pathologic conditions, namely obliterative bronchiolitis, in which expiratory CT scan can be abnormal despite normal inspiratory CT examination, and to highlight indications for this technique in patients with clinical and functional suspect of bronchiolar obstruction. PMID:23835554

Gaeta, Michele; Minutoli, Fabio; Girbino, Giuseppe; Murabito, Alessandra; Benedetto, Caterina; Contiguglia, Rosario; Ruggeri, Paolo; Privitera, Salvatore

2013-07-09

156

Unusual finding of endocervical-like mucinous epithelium in continuity with urothelium in endocervicosis of the urinary bladder  

PubMed Central

Endocervicosis in the urinary bladder is a rare benign condition. We present a case in a 37-year-old woman with classical clinical and pathological features of endocervicosis. The unusual observation of endocervical-like mucinous epithelium in continuity with the urothelium in addition to fully developed endocervicosis prompted immunohistochemical profiling of the case using antibodies to cytokeratins (AE1/AE3, CK19, CK7, CK5/6, CK20), HBME-1, estrogen receptor (ER) and progesterone receptor (PR) to assess the relationship of the surface mucinous and endocervicosis glandular epithelia. The surface mucinous epithelium, urothelium and endocervicosis glands were immunopositive for AE1/AE3, CK7 and CK19 while CK20 was only expressed by few urothelial umbrella cells. The surface mucinous epithelium was CK5/6 and HBME-1 immunonegative but showed presence of ER and PR. This was in contrast to the urothelium's expression of CK5/6 but not ER and PR. In comparison, endocervicosis glands expressed HBME-1, unlike the surface mucinous epithelium. The endocervicosis epithelium also demonstrated the expected presence of ER and PR and CK5/6 immunonegativity. The slightly differing immunohistochemical phenotypes of the surface mucinous and morphologically similar endocervicosis glandular epithelium is interesting and requires further clarification to its actual nature. The patient has remained well and without evidence of disease 18-months following transurethral resection of the lesion.

2011-01-01

157

Unusual finding of endocervical-like mucinous epithelium in continuity with urothelium in endocervicosis of the urinary bladder.  

PubMed

Endocervicosis in the urinary bladder is a rare benign condition. We present a case in a 37-year-old woman with classical clinical and pathological features of endocervicosis. The unusual observation of endocervical-like mucinous epithelium in continuity with the urothelium in addition to fully developed endocervicosis prompted immunohistochemical profiling of the case using antibodies to cytokeratins (AE1/AE3, CK19, CK7, CK5/6, CK20), HBME-1, estrogen receptor (ER) and progesterone receptor (PR) to assess the relationship of the surface mucinous and endocervicosis glandular epithelia. The surface mucinous epithelium, urothelium and endocervicosis glands were immunopositive for AE1/AE3, CK7 and CK19 while CK20 was only expressed by few urothelial umbrella cells. The surface mucinous epithelium was CK5/6 and HBME-1 immunonegative but showed presence of ER and PR. This was in contrast to the urothelium's expression of CK5/6 but not ER and PR. In comparison, endocervicosis glands expressed HBME-1, unlike the surface mucinous epithelium. The endocervicosis epithelium also demonstrated the expected presence of ER and PR and CK5/6 immunonegativity. The slightly differing immunohistochemical phenotypes of the surface mucinous and morphologically similar endocervicosis glandular epithelium is interesting and requires further clarification to its actual nature. The patient has remained well and without evidence of disease 18-months following transurethral resection of the lesion. PMID:21699710

Cheah, Phaik-Leng; Looi, Lai-Meng; Lee, George Eng-Geap; Teoh, Kean-Hooi; Mun, Kein-Seong; Nazarina, Abdul Rahman

2011-06-23

158

Rice body formation in bicipito-radial bursitis: ultrasound, CT, and MRI findings  

Microsoft Academic Search

The bicipito-radial bursa, which lies at the biceps tendon insertion on the radial tuberosity, is a rare site of chronic\\u000a bursitis. We describe the clinical, radiological, and pathological findings in a case complicated by multiple rice body formation.\\u000a In so doing, we describe MR appearances that allow discrimination of this entity from both synovial chondromatosis and pigmented\\u000a villonodular synovitis.

L. D. Spence; J. Adams; D. Gibbons; M. D. Mason; S. Eustace

1998-01-01

159

Syphilitic aortitis complicated by multiple aortic aneurysms: findings of multidetector CT.  

PubMed

We report a case of syphilitic aortitis complicated by multiple aortic aneurysms in a 50-year-old man with elevated rapid plasma reagin titer of 1:128 and positive Treponema pallidum particle agglutination test. 256-slice MDCT depicted two saccular aneurysms in the descending thoracic aorta with a markedly thick mural thrombus causing the trachea and esophagus to shift to the right. Thickening of the aortic wall was also noted. Stenting of the proximal descending thoracic aortic aneurysm and aorto-right common carotid artery bypass were performed. Operative findings revealed thickening of the descending thoracic aortic wall with a coarse luminal surface. PMID:21505957

Liu, Jianhua; Yuan, Qinghai; Golamaully, Reza; Gong, Tingting

2011-04-21

160

CT Findings of Ruptured Intramural Hematoma of the Aorta Extending Along the Pulmonary Artery  

SciTech Connect

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.

Sueyoshi, Eijun, E-mail: EijunSueyoshi@aol.com; Sakamoto, Ichiro; Uetani, Masataka [Nagasaki University School of Medicine, Department of Radiology (Japan); Matsuoka, Yojiro [National Nagasaki Medical Center, Department of Radiology (Japan); Suenaga, Etsuro [Nagasaki Kouseikai Hospital, Department of Cardiovascular Surgery (Japan)

2007-04-15

161

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

SciTech Connect

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.

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

1985-03-01

162

The Brain in Schizotypal Personality Disorder: A Review of Structural MRI and CT Findings  

PubMed Central

Studies of schizotypal personality disorder (SPD) are important because the condition is genetically related to schizophrenia and because data accumulating to confirm its biological underpinnings are challenging some traditional views about the nature of personality disorders. This review of 17 structural imaging studies in SPD indicates that individuals with this disorder show brain abnormalities in the superior temporal gyrus, parahippocampus, temporal horn region of the lateral ventricles, corpus callosum, thalamus, and septum pellucidum, as well as in total cerebrospinal fluid volume, similar to those seen in persons with schizophrenia. Differences between SPD and schizophrenia include lack of abnormalities in the medial temporal lobes and lateral ventricles in SPD. Whether the normal volume, and possibly normal functioning, of the medial temporal lobes in individuals with SPD may help to suppress psychosis in this disorder remains an intriguing but still unresolved question. Such speculation must be tempered due to a paucity of studies, and additional work is needed to confirm these preliminary findings. The imaging findings do suggest, however, that SPD probably represents a milder form of disease along the schizophrenia continuum. With further clarification of the neuroanatomy of SPD, researchers may be able to identify which neuroanatomical abnormalities are associated with the frank psychosis seen in schizophrenia.

Dickey, Chandlee C.; McCarley, Robert W.; Shenton, Martha E.

2010-01-01

163

Unusual Congenital Aortic Anomaly with Rare Common Celiamesenteric Trunk Variation: MR Angiography and Digital Substraction Angiography Findings  

SciTech Connect

Magnetic resonance angiography and digital substraction angiography (DSA) findings in a case with a rare congenital thoracoabdominal aortic hypoplasia and common celiamesenteric trunk variation with occlusion of infrarenal abdominal aorta are described here. To our knowledge, this aortic anomaly has not been previously described in the English literature. DSA is the optimum imaging modality for determination of aortic hypoplasia, associated vascular malformations, collateral vessels, and direction of flow within vessels.

Tosun, Ozgur [Ankara Ataturk Education and Research Hospital, Department of Radiology (Turkey)], E-mail: ztosun@yahoo.com; Sanlidilek, Umman [Ankara University School of Medicine, Department of Radiology (Turkey); Cetin, Huseyin [Ankara Ataturk Education and Research Hospital, Department of Radiology (Turkey); Ozdemir, Ozcan [Ankara Akay Hospital, Department of Cardiology (Turkey); Kurt, Aydin; Sakarya, Mehmet Emin; Tas, Ismet [Ankara Ataturk Education and Research Hospital, Department of Radiology (Turkey)

2007-09-15

164

Adult T-cell leukemia/lymphoma with follicular mucinosis: an unusual histopathological finding and a commentary.  

PubMed

Follicular mucinosis is currently recognized as a histopathological finding characterized by the accumulation of mucin within follicular epithelium and is commonly associated with follicular mycosis fungoides (MF). We report the finding of follicular mucinosis in a cutaneous nodule of human T-lymphotropic virus type 1 (HTLV-1) associated adult T-cell leukemia/lymphoma (ATLL). The patient was a 69-year-old female of Caribbean descent with a history of ATLL who presented with erythematous nodules on the chest and abdomen. Histopathologic examination showed a pan-dermal infiltrate of medium-to-large sized atypical lymphocytes extending into follicular epithelium where they associated with large mucin deposits. Immunohistochemical stains showed that the atypical lymphocytes were positive for CD3, CD4 and CD25 and negative for CD30. Cutaneous lesions of ATLL, which often present histopathologically as an epidermotropic lymphoma with Pautrier-type collections, are often difficult to distinguish from MF. Until recently, lymphoma-associated follicular mucinosis seemed specific to MF and Sézary syndrome (SS), being reported only once in a lesion of ATLL. We report a second case of ATLL-associated follicular mucinosis to increase awareness of this possible association, and briefly review the literature of follicular mucinosis-associated hematologic malignancies, ultimately cautioning against the interpretation of all cutaneous lymphoma-related follicular mucinosis as MF/SS. PMID:22905687

Camp, Brendan; Horwitz, Steven; Pulitzer, Melissa P

2012-09-01

165

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.

166

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

Microsoft Academic Search

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

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

2000-01-01

167

Measurement of Myocardial Extracellular Volume Fraction by Using Equilibrium Contrast-enhanced CT: Validation against Histologic Findings.  

PubMed

Purpose: To develop and validate equilibrium contrast material-enhanced computed tomography (CT) to measure myocardial extracellular volume (ECV) fraction by using a histologic reference standard and to compare equilibrium CT with equilibrium contrast-enhanced magnetic resonance (MR) imaging. Materials and Methods: A local ethics committee approved the study, and all subjects gave fully informed written consent. An equilibrium CT protocol was developed using iohexol at 300 mg of iodine per milliliter (bolus of 1 mg per kilogram of body weight administered at a rate of 3 mL/sec, followed immediately by an infusion of 1.88 mL/kg per hour with CT imaging before and at 25 minutes after injection of bolus of contrast agent) and ECV within the myocardial septum measured using both equilibrium CT and equilibrium MR imaging in patients with severe aortic stenosis. Biopsy samples of the myocardial septum collected during valve replacement surgery were used for histologic quantification of extracellular fibrosis with picrosirius red staining. Equilibrium CT- and equilibrium MR imaging-derived ECV measurements were compared with histologically quantified fibrosis by using Pearson correlation. Agreement between equilibrium CT and equilibrium MR imaging was assessed by using Bland-Altman comparison. Results: Twenty-three patients (16 male, seven female; mean age, 70.8 years; standard deviation, 8.3) were recruited. The mean percentage of histologic fibrosis was 18% (intersubject range, 5%-40%). There was a significant correlation between both equilibrium CT- and equilibrium MR imaging-derived ECV and percentage of histologic fibrosis (r = 0.71 [P < .001] and r = 0.84 [P < .0001], respectively). Equilibrium CT-derived ECV was significantly correlated to equilibrium MR imaging-derived ECV (r = 0.73). Conclusion: ECV measured by using equilibrium CT in patients with aortic stenosis correlates with histologic quantification of myocardial fibrosis and with ECV derived by using equilibrium MR imaging. © RSNA, 2013. PMID:23878282

Bandula, Steve; White, Steven K; Flett, Andrew S; Lawrence, David; Pugliese, Francesca; Ashworth, Michael T; Punwani, Shonit; Taylor, Stuart A; Moon, James C

2013-07-22

168

The watershed between right and left hepatic artery territories: findings on CT scans after transcatheter oily chemoembolization of hepatic tumors. A preliminary report  

Microsoft Academic Search

Summary The goals of this study were to delineate the boundary between the right and left hepatic artery territories by computed tomography (CT), to compare this boundary with the middle scissura of Couinaud's segmental anatomy, and to discuss the clinical implications of these findings. The 18 patients who underwent transcatheter oily chemoembolization (TOCE) of liver tumors via the right or

I. Oran; A. Metals

1998-01-01

169

The watershed between right and left hepatic artery territories: findings on CT scans after transcatheter oily chemoembolization of hepatic tumors. A preliminary report  

Microsoft Academic Search

The goals of this study were to delineate the boundary between the right and left hepatic artery territories by computed tomography (CT), to compare this boundary with the middle scissura of Couinaud’s segmental anatomy, and to discuss the clinical implications of these findings. The 18 patients who underwent transcatheter oily chemoembolization (TOCE) of liver tumors via the right or left

I. Oran; A. Memis

1999-01-01

170

CT angiography with three-dimensional techniques for the early diagnosis of intracranial aneurysms. Comparison with intra-arterial DSA and the surgical findings  

Microsoft Academic Search

Introduction: Cerebral CT angiography (CTA) is an established method applied to both the detection and treatment planning of intracranial aneurysms. The aim of our study was to compare CTA and digital subtraction angiography (DSA) findings with the surgical results mainly in patients with acute SAH and to evaluate the clinical usefulness of CTA. Materials and methods:During the last 2 years,

Maria T. Karamessini; George C. Kagadis; Theodore Petsas; Dimitrios Karnabatidis; Dimitrios Konstantinou; George C. Sakellaropoulos; George C. Nikiforidis; Dimitrios Siablis

2004-01-01

171

Role of [ 18 F]FDG PET\\/CT in the assessment of suspected recurrent ovarian cancer: correlation with clinical or histological findings  

Microsoft Academic Search

Purpose  To evaluate the accuracy of integrated positron emission tomography (PET) and computed tomography (CT) for depiction of suspected\\u000a recurrent ovarian carcinoma after treatment, with use of clinical or histological findings as the reference standard.\\u000a \\u000a \\u000a \\u000a Methods  Seventy-seven women (median age, 51 years) with ovarian carcinoma treated with primary cytoreductive surgery followed by platinum-based\\u000a combination chemotherapy were included, and [18F]fluorodeoxyglucose (FDG) PET\\/CT was performed

Hyun Hoon Chung; Won Jun Kang; Jae Weon Kim; Noh-Hyun Park; Yong-Sang Song; June-Key Chung; Soon-Beom Kang; Hyo-Pyo Lee

2007-01-01

172

Founder effects in two predominant intronic mutations of UNC13D, c.118-308C>T and c.754-1G>C underlie the unusual predominance of type 3 familial hemophagocytic lymphohistiocytosis (FHL3) in Korea.  

PubMed

Familial hemophagocytic lymphohistiocytosis (familial HLH or FHL) is a potentially fatal autosomal recessive disorder. Our previous study demonstrated that UNC13D mutations (FHL3) account for ~90 % of FHL in Korea with recurrent splicing mutation c.754-1G>C (IVS9-1G>C). Notably, half of the FHL3 patients had a monoallelic mutation of UNC13D. Deep intronic mutations in UNC13D were recently reported in patients of European descent. In this study, we performed targeted mutation analyses for deep intronic mutations and investigated on the founder effect in FHL3 in Korean patients. The study patients were 72 children with HLH including those with FHL3 previously reported to have a monoallelic UNC13D mutation. All patients were recruited from the Korean Registry of Hemophagocytic Lymphohistiocytosis. In addition to conventional sequencing of FHL2-4, targeted tests for c.118-308C>T and large intronic rearrangement mutations of UNC13D were performed. Haplotype analysis was performed for founder effects using polymorphic markers in the FHL3 locus. FHL mutations were detected in 20 patients (28 %). Seventeen patients had UNC13D mutations (FHL3, 85 %) and three had PRF1 mutations (FHL2, 15 %). UNC13D:c.118-308C>T was detected in ten patients, accounting for 38 % of all mutant alleles of UNC13D, followed by c.754-1G>C (26 %). Haplotype analyses revealed significantly shared haplotypes in both c.118-308C>T and c.754-1G>C, indicating the presence of founder effects. The deep intronic mutation UNC13D:c.118-308C>T accounts for the majority of previously missing mutations and is the most frequent mutation in FHL3 in Korea. Founder effects of two recurrent intronic mutations of UNC13D explain the unusual predominance of FHL3 in Korea. PMID:23180437

Seo, Ja Young; Song, Joon-Sup; Lee, Ki-O; Won, Hong-Hee; Kim, Jong-Won; Kim, Sun-Hee; Lee, Soo-Hyun; Yoo, Keon-Hee; Sung, Ki-Woong; Koo, Hong Hoe; Kang, Hyoung Jin; Shin, Hee Young; Ahn, Hyo-Seop; Han, Dong Kyun; Kook, Hoon; Hwang, Tai Ju; Lyu, Chuhl-Joo; Lee, Mi-Jung; Kim, Ji-Yoon; Park, Sung-Shik; Lim, Young-Tak; Kim, Bo-Eun; Koh, Kyung-Nam; Im, Ho Joon; Seo, Jong Jin; Kim, Hee-Jin

2012-11-24

173

Imaging diagnosis-ultrasonographic and ct findings in a gray seal (halichoerus grypus) with hepatic cirrhosis, pyelonephritis, and nephrolithiasis.  

PubMed

An immature gray seal was presented with lethargy, weight loss, vomiting and hematuria. Hepatic disease and urinary tract infection were suspected. Abdominal ultrasound showed hyperechoic structures with marked acoustic shadowing spread throughout both kidneys, but incomplete visualization of the liver. Abdominal CT showed mineral densities scattered throughout both kidneys and poor delineation of the liver. Due to the poor quality of life, the seal was euthanized. Postmortem examination showed ammonium urate nephroliths, pyelonephritis, and hepatic cirrhosis. This case report emphasizes the difficulty of characterizing liver disease with conventional 2D-ultrasound and CT in a deep-chested animal with minimal intra-abdominal fat. PMID:23578275

de Swarte, Marie; Bryan, Jill; Zarelli, Micaela; Huuskonen, Vihelmiina; Schneeweiss, Wilfried; McAllister, Hester

2013-04-12

174

Evaluation by SPECT-CT of an incidental finding of a thymoma and breast cancer in a myocardial perfusion SPECT with 99mTc-MIBI.  

PubMed

We present a case of a 78-year-old female with effort angina. A myocardial perfusion SPECT (MPS) showed increased tracer uptake in two synchronic tumor lesions, a thymoma and a breast cancer. This case highlights the contribution of SPECT-CT in the characterization of these findings and its essential role in rapid decision-making. The patient underwent surgery of both lesions that had gone undetected prior to the conduction of the MPS. PMID:23267742

García-Talavera, P; Olmos, R; Sainz-Esteban, A; Ruiz, M Á; González, M L; Gamazo, C

2012-12-23

175

Tumour thrombus in the superior vena cava from anaplastic carcinoma of the thyroid: FDG-PET\\/CT imaging findings  

Microsoft Academic Search

A 46-year-old male patient presented with a growing tumour in the neck, dyspnoea and upper inflow congestion. Biopsy showed an anaplastic thyroid cancer. This figure shows the coronal PET (a) and fused PET\\/CT images (b), with “worm-like” increased FDG uptake (arrow) extending from the primary tumour (short arrow) into the mediastinum and ending just above the right atrium. The transaxial

K. Strobel; H. C. Steinert; U. Bhure; A. Y. Koma; N. Gassmann; S. J. Stöckli

2007-01-01

176

Unusual Acute Encephalitis Involving the Thalamus: Imaging Features  

PubMed Central

Objective To describe the brain CT and MR imaging findings of unusual acute encephalitis involving the thalamus. Materials and Methods We retrospectively reviewed the medical records and CT and/or MR imaging findings of six patients with acute encephalitis involving the thalamus. CT (n=6) and MR imaging (n=6) were performed during the acute and/or convalescent stage of the illness. Results Brain CT showed brain swelling (n=2), low attenuation of both thalami (n=1) or normal findings (n=3). Initial MR imaging indicated that in all patients the thalamus was involved either bilaterally (n=5) or unilaterally (n=1). Lesions were also present in the midbrain (n=5), medial temporal lobe (n=4), pons (n=3), both hippocampi (n=3) the insular cortex (n=2), medulla (n=2), lateral temporal lobe cortex (n=1), both cingulate gyri (n=1), both basal ganglia (n=1), and the left hemispheric cortex (n=1). Conclusion These CT or MR imaging findings of acute encephalitis of unknown etiology were similar to a combination of those of Japanese encephalitis and herpes simplex encephalitis. In order to document the specific causative agents which lead to the appearance of these imaging features, further investigation is required.

Kim, Sam Soo; Kim, Kyung Won; Han, Moon Hee; Park, Sung Ho; Nam, Hyun Woo; Choi, Kyu Ho; Cho, Woo Ho

2001-01-01

177

Metastatic Renal Cell Carcinoma: Radiologic Findings and Assessment of Response to Targeted Antiangiogenic Therapy by Using Multidetector CT.  

PubMed

Recent advances in treatment of metastatic renal cell carcinoma (RCC), such as new molecular therapies that use novel antiangiogenic agents, have led to revision of the most frequently used guideline to evaluate tumor response to therapy: Response Evaluation Criteria in Solid Tumors (RECIST 1.1). Assessment of the response of metastatic RCC to therapy has traditionally been based on changes in target lesion size. However, the mechanism of action of newer antiangiogenic therapies is more cytostatic than cytotoxic, which leads to disease stabilization rather than to tumor regression. This change in tumor response makes RECIST 1.1-a system whose criteria are based exclusively on tumor size-inadequate to discriminate patients with early tumor progression from those with more progression-free disease and prolonged survival. New criteria such as changes in attenuation, morphology, and structure, as seen at contrast-enhanced multidetector computed tomography (CT), are being incorporated into new classifications used to assess response of metastatic RCC to antiangiogenic therapies. The new classifications provide better assessments of tumor response to the new therapies, but they have some limitations. The authors provide a practical review of these systems-the Choi, modified Choi, and Morphology, Attenuation, Size, and Structure (MASS) criteria-by explaining their differences and limitations that may influence the feasibility and reproducibility of these classifications. The authors review the use of multidetector CT in the detection of metastatic RCC and the different appearances and locations of these lesions. They also provide an overview of the new antiangiogenic therapies and their mechanisms of action and a brief introduction to functional imaging techniques. Functional imaging techniques, especially dynamic contrast-enhanced CT, seem promising for assessing response of metastatic RCC to treatment. Nonetheless, further studies are needed before functional imaging can be used in routine clinical practice. © RSNA, 2013. PMID:24108558

Brufau, Blanca Pańo; Cerqueda, Carmen Sebastiŕ; Villalba, Laura Buńesch; Izquierdo, Rafael Salvador; González, Begońa Mellado; Molina, Carlos Nicolau

2013-10-01

178

Nonmyxoid mediastinal lipoblastoma in a 2-year-old girl: Case report with US, CT, and MRI findings  

PubMed Central

Lipoblastomas are rare, benign tumors of mesenchymal origin that contain adipose tissue. They usually develop in the soft tissues of an extremity in infants, children, and young adolescents. We report the case of a 22-month old girl referred to our staff for swelling in the supraclavicular fossa, which was observed when the child cried. The ulstrasonographic examination revealed a mass in the anterosuperior portion of the mediastinum that extended into the right supraclacular fossa. The lesion was weakly hyperechoic with clear-cut margins and did not appear to invade surrounding tissues. On CT, it appeared inhomogeneously hypodense with denitometric characteristics of adipose tissue. On MRI, it was hyperintense on both T1- and T2-weighted sequences and reduced signal intensity in FAT SAT sequences. In light of the imaging features and predominant adipose tissue component, the mass was diagnosed as a mediastinal lipoblastoma, and this diagnosis was confirmed by surgical histology.

Canonico, F.; Patassini, M.; Malaspina, C.

2011-01-01

179

Nonmyxoid mediastinal lipoblastoma in a 2-year-old girl: Case report with US, CT, and MRI findings.  

PubMed

Lipoblastomas are rare, benign tumors of mesenchymal origin that contain adipose tissue. They usually develop in the soft tissues of an extremity in infants, children, and young adolescents. We report the case of a 22-month old girl referred to our staff for swelling in the supraclavicular fossa, which was observed when the child cried. The ulstrasonographic examination revealed a mass in the anterosuperior portion of the mediastinum that extended into the right supraclacular fossa. The lesion was weakly hyperechoic with clear-cut margins and did not appear to invade surrounding tissues. On CT, it appeared inhomogeneously hypodense with denitometric characteristics of adipose tissue. On MRI, it was hyperintense on both T1- and T2-weighted sequences and reduced signal intensity in FAT SAT sequences. In light of the imaging features and predominant adipose tissue component, the mass was diagnosed as a mediastinal lipoblastoma, and this diagnosis was confirmed by surgical histology. PMID:23396826

Canonico, F; Patassini, M; Malaspina, C

2011-03-01

180

The Role and Limitations of 18-Fluoro-2-deoxy-d-glucose Positron Emission Tomography (FDG-PET) Scan and Computerized Tomography (CT) in Restaging Patients with Hepatic Colorectal Metastases Following Neoadjuvant Chemotherapy: Comparison with Operative and Pathological Findings  

PubMed Central

Background Recent data confirmed the importance of 18-fluoro-2-deoxy-d-glucose positron emission tomography (FDG-PET) in the selection of patients with colorectal hepatic metastases for surgery. Neoadjuvant chemotherapy before hepatic resection in selected cases may improve outcome. The influence of chemotherapy on the sensitivity of FDG-PET and CT in detecting liver metastases is not known. Methods Patients were assigned to either neoadjuvant treatment or immediate hepatic resection according to resectability, risk of recurrence, extrahepatic disease, and patient preference. Two-thirds of them underwent FDG-PET/CT before chemotherapy; all underwent preoperative contrast-enhanced CT and FDG-PET/CT. Those without extensive extrahepatic disease underwent open exploration and resection of all the metastases according to original imaging findings. Operative and pathological findings were compared to imaging results. Results Twenty-seven patients (33 lesions) underwent immediate hepatic resection (group 1), and 48 patients (122 lesions) received preoperative neoadjuvant chemotherapy (group 2). Sensitivity of FDG-PET and CT in detecting colorectal (CR) metastases was significantly higher in group 1 than in group 2 (FDG-PET: 93.3 vs 49%, P?CT: 87.5 vs 65.3, P?=?0.038). CT had a higher sensitivity than FDG-PET in detecting CR metastases following neoadjuvant therapy (65.3 vs 49%, P?CT, was lower in group 2 patients whose chemotherapy included bevacizumab compared to patients who did not receive bevacizumab (39 vs 59%, P?=?0.068). Conclusions FDG-PET/CT sensitivity is lowered by neoadjuvant chemotherapy. CT is more sensitive than FDG-PET in detecting CR metastases following neoadjuvant therapy. Surgical decision-making requires information from multiple imaging modalities and pretreatment findings. Baseline FDG-PET and CT before neoadjuvant therapy are mandatory.

Metser, Ur; Geva, Ravit; Nakache, Richard; Shmueli, Einat; Klausner, Joseph M.; Even-Sapir, Einat; Figer, Arie; Ben-Haim, Menahem

2007-01-01

181

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

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.

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

182

3T-MRI, elastography, digital mammography, and FDG-PET CT findings of subcutaneous panniculitis-like T-cell lymphoma (SPTCL) of the breast.  

PubMed

Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is a rare subtype of cutaneous lymphoma, which is characterized by infiltration of neoplastic cytotoxic T cells into the subcutaneous tissue. We here report the case of a 66-year-old woman with SPTCL of the breast, which is a very uncommon location. Multiple suspicious irregular small masses in the subcutaneous fat were detected by mammography, and sonograms revealed hyperechoic masses. Elastography was useful to improve depiction and delineation of SPTCL in the hyperechoic subcutaneous fat, and dynamic contrast-enhanced MRI examinations showed multiple irregular rim enhanced masses with persistent enhancement. FDG-PET CT images showed hypermetabolism in areas corresponding to other imaging techniques. MRI can be useful for diagnosis of fat necrosis, which is a primary radiologic feature of SPTCL. However, fat necrosis has multitude of appearances by various imaging techniques, which typically indicate a benign disease, but may indicate a malignancy. Therefore, an ultrasonographically guided core needle biopsy is useful for a diagnosis of SPTCL of the breast. The presence of multiple subcutaneous nodules throughout the body on CT imaging may be an important finding that suggests a diagnosis of SPTCL. PMID:22872501

Uematsu, Takayoshi; Kasami, Masako

2012-08-09

183

Evaluating of Small Intracranial Aneurysms by 64-Detector CT Angiography: A Comparison with 3-Dimensional Rotation DSA or Surgical Findings.  

PubMed

BACKGROUND AND PURPOSE: The diagnostic performance of 64-detector computed tomographic angiography (CTA) for detection of small intracranial aneurysms (SIAs) was evaluated. METHODS: In this prospective study, 112 consecutive patients underwent 64-detector CTA before volume-rendering rotation digital subtraction angiography (VR-RDSA) or surgery. VR-RDSA or intraoperative findings or both were used as the gold standards. The accuracy, sensitivity, specificity, and positive predictive values (PPV) and negative predictive values (NPV), as measures to detect or rule out SIAs, were determined by patient-based and aneurysm size-based evaluations. RESULTS: The reference standard methods revealed 84 small aneurysms in 71 patients. The results of patient-based 64-detector CTA evaluation for SIAs were: accuracy, 98.2%; sensitivity, 98.6%; specificity, 97.6%; PPV, 98.6%; and NPV, 97.6%. The aneurysm-based evaluation results were: accuracy, 96.8%; sensitivity, 97.6%; specificity, 95.1%; PPV, 97.6%; and NPV, 95.1%. Two false-positive and two false-negative findings for aneurysms <3 mm in size occurred in the 64-detector CTA analysis. CONCLUSION: The diagnostic performance of 64-detector CTA did not improve much compared with 16-detector CTA for detecting SIAs, especially for very small aneurysms. VR-RDSA is still necessary for patients with a history of subarachnoid hemorrhage if the CTA findings are negative. PMID:23228080

Zhang, He; Hou, Chang; Zhou, Zhi; Zhang, Hao; Zhou, Gen; Zhang, Gui

2012-12-10

184

Correlation of panoramic radiography and cone beam CT findings in the assessment of the relationship between impacted mandibular third molars and the mandibular canal  

PubMed Central

Objectives The aim of this study was to assess the reliability of four panoramic radiographic findings, both individually and in association, in predicting the absence of corticalization between the mandibular canal and the third molar on cone beam CT (CBCT) images. Methods The sample consisted of 72 individuals (142 mandibular third molars) who underwent pre-operative radiographic evaluation before extraction of impacted mandibular third molars. On panoramic radiographs, the most common signs of corticalization (darkening of roots, diversion of mandibular canal, narrowing of mandibular canal and interruption of white line) and the presence or absence of corticalization between the mandibular third molar and the mandibular canal on CBCT images were evaluated. Results Darkening of roots and interruption of white line associated with the absence of corticalization between the mandibular third molar and the mandibular canal on CBCT images were statistically significant, both as isolated findings (p = 0.0001 and p = 0.0006, respectively) and in association (p = 0.002). No statistically significant association was observed for the other panoramic radiographic findings, either individually or in association (p > 0.05). Conclusion Darkening of roots and interruption of white line observed on panoramic radiographs, both as isolated findings and in association, were effective in determining the risk relationship between the tooth roots and the mandibular canal, requiring three-dimensional evaluation of the case.

Neves, F S; Souza, T C; Almeida, S M; Haiter-Neto, F; Freitas, D Q; Boscolo, F N

2012-01-01

185

CT demonstration of peripelvic and periureteral non-Hodgkin lymphoma  

SciTech Connect

Abdominal CT is often performed for the staging of lymphoma. Retroperitoneal lymphadenopathy is the most common abnormality identified, but various extranodal sites of lymphomatous involvement have been reported, especially in non-Hodgkin lymphoma. Renal involvement is not rare, but peripelvic or periureteral involvement in the absence of renal parenchymal involvement or contiguous abdominal adenopathy is extremely unusual. Two recent patients with non-Hodgkin lymphoma who did show these findings are presented.

McMillin, K.I.; Gross, B.H.

1985-05-01

186

Incidental Non-Cardiac Findings of a Coronary Angiography with a 128-Slice Multi-Detector CT Scanner: Should We Only Concentrate on the Heart?  

PubMed Central

Objective To evaluate the spectrum, prevalence, and significance of incidental non-cardiac findings (INCF) in patients referred for a non-invasive coronary angiography using a 128-slice multi-detector CT (MDCT). Materials and Methods The study subjects included 1,044 patients; 774 males (mean age, 59.9 years) and 270 females (mean age, 63 years), referred for a coronary CT angiography on a 128-slice MDCT scanner. The scans were acquired from the level of the carina to just below the diaphragm. To evaluate INCFs, images were reconstructed with a large field of view (> 300 mm) covering the entire thorax. Images were reviewed in the axial, coronal, and sagittal planes, using the mediastinal, lung, and bone windows. The INCFs were classified as severe, indeterminate, and mild, based on their clinical importance, and as thoracic or abdominal based on their locations. Results Incidental non-cardiac findings were detected in 56% of patients (588 of 1,044), including 435 males (mean age, 65.6 years) and 153 females (mean age, 67.9 years). A total of 729 INCFs were observed: 459 (63%) mild (58% thoracic, 43% abdominal), 96 (13%) indeterminate (95% thoracic, 5% abdominal), and 174 (24%) severe (87% thoracic, 13% abdominal). The prevalence of severe INCFs was 15%. Two severe INCFs were histologically verified as lung cancers. Conclusion The 128-slice MDCT coronary angiography, in addition to cardiac imaging, can provide important information on the pathology of the chest and upper abdomen. The presence of severe INCFs is not rare, especially in the thorax. Therefore, all organs in the scan should be thoroughly evaluated in daily clinical practice.

Vassiou, Katerina; Kanavou, Theodora; Vlychou, Marianna; Arvanitis, Dimitrios L.; Fezoulidis, Ioannis V.

2010-01-01

187

Severe form of radiculo - myelo - neuropathy with meningo - encephalitis secondary to Angiostrongylus cantonensis infection: Unusual corpus callosal lesions and serial magnetic resonance imaging findings.  

PubMed

A 43-year-old man presented with the symptoms of recurrent lower abdominal pain, malaise and loss of appetite of 3-week duration, followed by acute onset of generalized paresthesias, fever and headache which progressed over few days to quadriparesis, altered sensorium, urinary and fecal incontinence. He had consumed raw tongue, liver, gall bladder and testicles of monitor lizard (Varanus bengalensis). Blood picture showed eosinophilia and cerebrospinal fluid (CSF) analysis revealed elevated protein and eosinophilia. Serum and CSF serology was positive for angiostrongyliasis. Magnetic resonance imaging showed focal hyperintense lesions in the corpus callosum and brainstem and an enhancing lesion in the cerebellum. Post-contrast T1-weighted axial images of spine showed evidence of cervical cord hyperintense lesions and root enhancement. Susceptibility weighted images/phase images showed unusual feature of multiple hemorrhagic lesions in the posterior fossa and supratentorial areas. Diffusion showed no restriction of corpus callosal lesions. Patient was treated with the high dose parenteral steroids with albendazole and at 6-month follow-up and had a remarkable recovery. PMID:24005735

Nalini, Atchayaram; Ramakrishna, Anil; Dekumoy, Paron; Kumar, Raju Ravi; Pakdee, Wallop; Saini, Jitender; Hegde, Vinay S

188

Gallbladder metastasis from malignant melanoma: diagnosis with FDG PET/CT.  

PubMed

Melanoma with metastasis to the gallbladder is sometimes seen on autopsy but is rarely seen in living patients, in part because it is often asymptomatic. A 67-year-old man with a history of malignant melanoma in situ underwent an F-18 FDG PET/CT scan, which showed a gallbladder focus (SUV 16.9). Four months later, on the repeat FDG PET/CT scan, a new lesion in the gallbladder was noted. Laparoscopic cholecystectomy was done and histopathologic findings were consistent with gallbladder metastasis of melanoma. PET/CT detects metastasis at unusual sites accurately and is helpful in correct staging and management of patients with melanoma. PMID:17117082

Rehani, Bhavya; Strohmeyer, Pamela; Jacobs, Martin; Mantil, Joseph

2006-12-01

189

Idiopathic pulmonary fibrosis complicated by acute thromboembolic disease: chest X-ray, HRCT and multi-detector row CT angiographic findings  

PubMed Central

Idiopathic pulmonary fibrosis (IPF) is a chronic diffuse interstitial disease characterized by a predominant reticular pattern of involvement of the lung parenchyma which can be well documented by High Resolution Computed Tomography (HRCT). While almost half of the patients with IPF may develop pulmonary arterial hypertension, the occurrence of superimposed acute thrombo-embolic disease is rare. We describe a case of an 87 yrs old female who was found to have IPF complicated by acute pulmonary thrombo-embolism during the clinical and radiological investigation of a rapidly worsening dyspnea. While chest x-ray findings were initially considered consistent with a congestive heart failure, a bed side echocardiography revealed findings suggestive of pulmonary arterial hypertension and right ventricular failure with enlargement of both right cavities and associated valvular regurgitations. An acute thrombo-embolic disease was initially ruled out by a perfusion lung scintigraphy and subsequently confirmed by contrast-enhanced multi-detector CT which showed an embolus at the emergency of the right inter-lobar artery with associated signs of chronic pulmonary hypertension. However, unenhanced scans performed with both conventional and high resolution techniques also depicted a reticular pattern of involvement of lung parenchyma considered suggestive of IPF despite a atypical upper lobe predominance. IPF was later confirmed by further clinical, serological and instrumental follow-up.

Campanile, Francesco; Imbriaco, Massimo; Ippolito, Renato; Sirignano, Cesare; Santoro, Ciro; Galderisi, Maurizio; Salvatore, Marco

2013-01-01

190

CT findings in runner's colitis.  

PubMed

A spectrum of lower gastrointestinal tract symptoms occurs in marathon runners. Although most symptoms are transient, reversible ischemic colitis is a rare complication that typically responds to supportive therapy. Because computed tomographic features have not been previously described to our knowledge, we describe abdominal computed tomographic manifestations of reversible ischemic colitis in three marathon runners. On computed tomography, reversible ischemic colitis involves the cecum, with varying involvement of the proximal colon. PMID:16333702

Kyriakos, R; Siewert, B; Kato, E; Sosna, J; Kruskal, J B

2005-12-07

191

Unusual presentation of an anterior sacral meningocele: magnetic resonance imaging, multidetector computed tomography, and fistulography findings of bacterial meningitis secondary to a rectothecal fistula.  

PubMed

An anterior sacral meningocele, a rare congenital anomaly, manifested in a previously healthy 44-year-old woman with findings of meningitis, including headache, vomiting, unconsciousness, and fever. Nontraumatic pneumocephalus, tetraventricular hydrocephalus, fluid-fluid level at the lateral ventricles, and pial enhancement were observed on multidetector computed tomography. A ventricular drainage catheter was placed to decompress the hydrocephalus, and drainage was performed urgently. Escherichia coli was isolated from the drainage material. Whole-spine magnetic resonance imaging and fistulography were undertaken on the third day after admission to evaluate for anal and urinary incontinence and pareses of both upper and lower extremities. Spinal arachnoiditis, tethered cord, dysgenesis of the sacrum, and a rectothecal fistula were demonstrated. Specific antibiotic treatment and surgery for fistula tract excision were performed. PMID:21882098

Koksal, Ali; Canyigit, Murat; Kara, Taylan; Ulus, Aykan; Gokbayir, Hakan; Sarisahin, Murat

2011-09-01

192

A complex de novo translocation of chromosomes 4, 6 and 21 in a child with dysmorphic features and unusual hematological findings  

SciTech Connect

A 5 1/2-year-old white male was referred to our institution for evaluation of easy bruising confined to lower extremities since infancy. His family history is not significant with healthy parents and six normal siblings. Physical examination revealed weight and height both in 50th and 75th percentile, respectively. Major findings included macrocephaly with prominent forehead, hypertelorism with inner and outer canthus distances both above 97th percentile, epicanthus folds, normal ears with prominent upper pinnae, thin, sharp nose with pointed tip, neck with pterygium coli appearance and shortened clavicles, short thumbs with hyperconvex nails that curved around tip of fingers, abnormally bowed elbows and knee joints, prominent abdomen with omphalocele and flat feet with hypoplastic nails. He has a speech articulation problem which may be due to high arched palate. Hematological evaluation revealed PT/PTT values in normal range with prolonged bleeding time > 15 minutes. Because of abnormal elbow and knee joints, Mitromycin C Stress test was performed to rule out Fanconi`s anemia (FA). The chromosome breakage frequency was found to be within the normal range for both the patient and the control. Thus, the diagnosis of FA was ruled out. However, cytogenetic analysis revealed a three-way complex translocation between chromosomes 4, 6 and 21 with an apparent balanced carrier male karyotype: 46,XY,t(4;6;21)(4qter{r_arrow}4p16::21q21{r_arrow} 21qter;6qter{r_arrow}6p21.1::4p16{r_arrow}4pter;21pter{r_arrow} 21q21::6p21.1{r_arrow}6pter). Both parents have normal chromosomes.

Muneer, R.S.; Hopcus, D.J.; Sarale, C. [Univ. of Oklahoma Health Sciences Center, Oklahoma City, OK (United States)] [and others

1994-09-01

193

Scoring CT\\/HRCT findings among asbestos-exposed workers: effects of patient’s age, body mass index and common laboratory test results  

Microsoft Academic Search

We studied the effects of age, body mass index (BMI) and some common laboratory test results on several pulmonary CT\\/HRCT signs. Five hundred twenty-eight construction workers (age 38–80, mean 63 years) were imaged with spiral and high resolution CT. Images were scored by three radiologists for solitary pulmonary nodules, signs indicative of fibrosis and emphysema, ground glass opacities, bronchial wall

T. Vehmas; L. Kivisaari; M. S. Huuskonen; M. S. Jaakkola

2005-01-01

194

Thymic Extension in the Superior Mediastinum in Patients with Thymic Hyperplasia: Potential Cause of False-Positive Findings on 18F-FDG PET\\/CT  

Microsoft Academic Search

OBJECTIVE. Although 18F-FDG PET\\/CT is now well established as an accurate method for the staging and restaging of various cancers, it is also well recognized that many false-pos- itive results can occur. One such false-positive is activity within the superior extent of the thy- mus in the superior mediastinum. CONCLUSION. We reviewed all PET\\/CT examinations performed in children and young

Clare S. Smith; Heiko Schöder; Henry W. D. Yeung

195

Unusual Stab Wound of the Temporal Region  

Microsoft Academic Search

We report the case of an unusual penetrating injury of the temporal region of the head caused by knife. A long kitchen knife was protruding from the upper auricular area of the left temporal region of victim's head. It cut through the poste- rosuperior part of the left auricula and remained fixed to the postauricular region. Brain computorized tomography (CT)

Ivo Glunčić; Mario Tudor; Vicko Glunčić

196

TMJ metastasis: A unusual case report  

Microsoft Academic Search

The metastases to the TMJ from a primary lung tumour is a very rare occurrence. This case is unusual in several aspects, as the non-reducible dislocation of the TMJ was the first clinical manifestation of the tumour. CT staging showed that this secondary tumour in the condyle was the only bone metastasis.

Roberto Boniello; Giulio Gasparini; Giuseppe D'Amato; Alessandro Di Petrillo; Sandro Pelo

2008-01-01

197

The 18F-FDG PET/CT Finding of a Condyloma Acuminata Mimicking Primary Anorectal Carcinoma in an HIV-Infected Patient.  

PubMed

This case report describes a condyloma acuminata with intense FDG uptake mimicking primary anorectal carcinoma in an HIV-infected patient.A 44-year-old HIV-positive homosexual man with a history of lymphoma underwent an F-FDG PET/CT for restaging. A focal intense hypermetabolic lesion around the anorectal area was found by the PET/CT and it was suggested as a tumorous lesion. However, the lesion was not detected on the contrast-enhanced abdominal CT. Via a sigmoidoscopy, cauliflower-like masses were visualized in the intra-anal area. The tumor was surgically excised and proven to be condyloma acuminata by permanent pathology. PMID:22996249

Kim, Bom Sahn

2013-10-01

198

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

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.

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

1985-01-01

199

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  

Microsoft Academic Search

A multicenter study has been employed to evaluate the diagnostic efficacy of magnetic resonance imaging (MRI) using the new\\u000a liver-specific contrast agent gadoxetic acid (Gd-EOB-DTPA, Primovist), as opposed to contrast-enhanced biphasic spiral computed\\u000a tomography (CT), in the diagnosis of focal liver lesions, compared with a standard of reference (SOR). One hundred and sixty-nine\\u000a patients with hepatic lesions eligible for surgery

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

2008-01-01

200

CT Appearance of Acute Appendagitis  

Microsoft Academic Search

OBJECTIVE. Our aim was to describe the spectrum of CT findings in patients with acute epiploic appendagitis and also to evaluate the changes seen with this condition. MATERIALS AND METHODS . Fifty patients diagnosed with acute epiploic ap- pendagitis seen on contrast-enhanced CT were included in this study. The CT scans of the epiploic appendagitis were evaluated for the presence

Ajay K. Singh; Debra A. Gervais; Peter F. Hahn; James Rhea; Peter R. Mueller

2004-01-01

201

A metastatic cancer to skin in an otherwise asymptomatic young man: an unusual presentation.  

PubMed

Cutaneous metastasis is a rare complication of visceral malignancies. We present a very unusual case of a 33 year-old seemingly healthy man with a sudden and rapidly enlarging skin lesion that was diagnosed as a skin metastasis of his visceral malignancy. Abdominopelvic CT scan revealed thickening of the anterior wall of the urinary bladder and the fundus and body of the stomach. Skin biopsy histopathological findings were suggestive of poorly differentiated metastatic carcinoma. The origin of the primary carcinoma was bladder adenocarcinoma or/and gastric adenocarcinoma, but the tumor was so poorly differentiated that the original source of the tumor could not be defined with certainty. PMID:24139375

Salmanpoor, Rahmatollah; Saki, Nasrin; Sepaskhah, Mojdeh; Aslani, Fatemeh Sari; Kardeh, Bahareh

2013-10-16

202

Intentional overdose with tiagabine: an unusual clinical presentation.  

PubMed

Tiagabine (Gabitril) is a unique anticonvulsant that is prescribed for a variety of psychiatric disorders. We report a case of intentional self-poisoning with tiagabine. A 46-year-old woman was brought to the Emergency Department after being found confused and nonverbal while wandering in a field. Eighteen tablets (72 mg) of her tiagabine prescription were missing. Remarkable findings on initial examination were facial grimacing, flexure posturing of both upper extremities, and 7-mm, reactive pupils. She was uncommunicative and unable to follow commands. Vital signs, blood chemistries and a head CT scan were normal. Urine toxicology screening was negative. An extrapyramidal reaction was suspected and diphenhydramine 50 mg was administered without effect. Lorazepam 2 mg was given with significant improvement. She was admitted for observation and all symptoms resolved within 12 h of admission. Tiagabine overdose causes an unusual array of neurological symptoms, many similar to reported adverse effects during therapeutic use. PMID:15388215

Cantrell, F Lee; Ritter, Mike; Himes, Ed

2004-10-01

203

Embryonal Rhabdomyosarcoma Arising from a Mediastinal Teratoma: An Unusual Case Report  

PubMed Central

We report an unusual case of 9.5-cm-sized embryonal rhabdomyosarcoma arose from a mediastinal mature teratoma in a 46-yr-old man. A man presented with chest trauma as a result of an accident at 10 September 2011. On chest X-ray, an anterior mediastinal mass was detected. To obtain further information, chest computed tomography (CT) with contrast enhancement was performed, revealing an anterior mediastinal mass. Complete surgical excision was performed and entire specimen was evaluated. Pathologic diagnosis was embryonal rhabdomyosarcoma arising in mature cystic teratoma. After surgical excision, two cycles of dactinomycin-based chemotherapy were performed. Lung metastasis was detected on follow up CT in September 2012, and wedge resection was performed. Pathological finding of the lung lesion showed same feature with that of primary rhabdomyosarcoma.

Yoo, Su Hyun; Jung, Min Jung; Jang, Sejin; Cho, Kyung-Ja

2013-01-01

204

Fusion PET-CT detection of neurolymphomatosis originating from primary breast lymphoma: A case report and literature review  

PubMed Central

Neurolymphomatosis (NL) is an extremely rare manifestation. Involvement of the cranial and peripheral nerves is an unusual manifestation of NL which is occasionally difficult to diagnose using conventional imaging modalities. A 45-year-old female in complete remission from primary breast lymphoma presented with multiple neurological symptoms. 18F-FDG PET/CT revealed multiple nodular hypermetabolic lesions along the cranial and peripheral nerves, which corresponded to the patient’s neurological symptoms. These findings suggest that 18F-FDG PET/CT successfully detects the infiltration of cranial and peripheral nerves by lymphoma.

XU, LIYING; ZHOU, YUNFENG; QIU, DASHENG; SHAMS, SALMAN

2012-01-01

205

An unusual manifestation of acute appendicitis with left flank pain  

PubMed Central

The author presents a case with an unusual presentation of early appendicitis. The patient presented initially with left sided flank pain. Workup for nephrolithiasis, including non-contrast CT of the abdomen and pelvis was negative for renal stones or hydronephrosis. After discharge, the patient presented one week later in the ED with right lower quadrant pain. Contrast enhanced CT of the abdomen revealed perforated appendicitis.

Talanow, Roland

2008-01-01

206

Correlation of CT analysis and audiometry in Japanese otosclerosis  

Microsoft Academic Search

Objective: To determine the extent of audiometric correlation with CT findings. Methods: Forty-four patients (82 ears) with surgically confirmed otosclerosis underwent preoperative CT examination. Based on the computed tomography (CT) findings, the ears were classified into five groups as follows: Group A, the group with no pathological CT findings; Group B1, the group with demineralization localized in the region of

Kensuke Kiyomizu; Tetsuya Tono; Dewen Yang; Atsushi Haruta; Takao Kodama; Shizuo Komune

2004-01-01

207

[Unusual carbon monoxide poisoning].  

PubMed

Despite of indicative death scenes or characteristic findings of the external examination, about 40% of the accidental fatal intoxications due to carbon monoxide are not recognized before the performance of the autopsy. Six cases are reported which illustrate possible reasons for the delayed establishment of the diagnosis: unusual circumstances of the intoxication or sources of carbon monoxide, only subtle degree or lack of external signs of the intoxication or a competing cause of death at autopsy.--Cases 1 and 2: 53, respectively 54-year-old couple, found dead in a caravan, extreme putrefaction of the bodies, spectrophotometric detection of the fatal carboxyhaemoglobin level in oedema fluid of the scalp.--Case 3: 23-year-old lorry driver, found dead in the tightly closed cab of his lorry, operation of a source of electricity with "environmentally friendly" fuel, carboxyhaemoglobin level 83%.--Case 4: 19-year-old man, found dead in the flat of friends, removal of the CO-source before alerting the police forces, lack of the bright pink coloration of livor mortis, haemopericardium due to atrial rupture at postmortem examination, carboxyhaemoglobin level 65%.--Case 5: 27-year-old man, found dead in his flat, advanced decomposition of the body, residues of a charcoal fire in a metal bucket in the sink, carboxyhaemoglobin level 80%.--Case 6: 42-year-old woman, lying dead in the garage beside her car, engine switched-off, ignition key next to the body on the floor under the car, carboxyhaemoglobin level 46%. PMID:11591055

Schmidt, P; Musshoff, F; Dettmeyer, R; Madea, B

208

An unusual spinal intradural arachnoid cyst  

Microsoft Academic Search

Spinal intradural arachnoid cysts are seen most frequently in the thoracic region, particularly near the midline posteriorly. A thoracic intradural arachnoid cyst in this typical location is reported, with the additional unusual finding of herniation of the spinal cord through an anterior defect in the dura mater. The MRI findings are described.

J. P. Slavotinek; M. R. Sage; B. P. Brophy

1996-01-01

209

Chronic pulmonary emboli and radiologic mimics on CT pulmonary angiography: a diagnostic challenge.  

PubMed

Chronic pulmonary thromboembolism (CPE) is a challenging diagnosis for clinicians. It is an often-forgotten diagnosis and can be difficult to detect and easily misdiagnosed. The radiologic features on CT pulmonary angiography are subtle and can be further compounded by pathologic mimics and unusual findings observed with disease progression. Diagnosis is important because CPE can lead to progressive pulmonary hypertension, morbidity, and mortality. Moreover, chronic thromboembolic pulmonary hypertension is the only category of pulmonary hypertension with an effective curative treatment in the form of pulmonary endarterectomy. Therefore, CPE must be considered and recognized early. The features of chronic pulmonary emboli on CT scans can be categorized into vascular or parenchymal findings. Endoluminal signs include totally or partially occlusive thrombi and webs and bands. Parenchymal features such as mosaic attenuation and pulmonary infarction are also noted, in addition to features of pulmonary artery hypertension. Additional findings have been noted, including cavitation of infarcts, microbial colonization of cavities, and bronchopleural fistulae. As CPE can be diagnosed at different stages of its disease pathway, such findings may not necessarily arouse suspicion toward a causative diagnosis of chronic embolism. To aid diagnosis for clinicians, this article describes the characteristic vascular and parenchymal CT scan features of chronic emboli, as well as important ancillary findings. We also provide an illustrative case series focusing on CT pulmonary angiography specifically as an imaging modality to highlight the progressive nature of CPE and its sequelae, as well as important radiologic mimics to consider in the differential diagnosis. PMID:23648910

Wijesuriya, Shalini; Chandratreya, Ladli; Medford, Andrew R

2013-05-01

210

Vertebral Artery Dissection Diagnosed with CT  

Microsoft Academic Search

Summary: Vertebral artery dissection after neck manipulation has been well described. A case of bilateral vertebral artery dissection diagnosed with dynamic CT scanning of the neck is reported. The CT appearances and correlative angiographic and MR findings are presented.

J. R. Soper; G. D. Parker; J. M. Hallinan

211

CT gastrography  

Microsoft Academic Search

The rapid dissemination of multidetector-row computed tomographic (CT) technology will make faster and more accurate gastric imagining available. Two-dimensional multiplanar reconstruction and CT gastrography including virtual gastroscopy and transparency rendering using volume rendering are types of interactive two- and three-dimensional medical imaging tools. It provides multiplanar cross-sectional imaging, gastroscopic viewing, and upper gastrointestinal series imaging in the same data acquisition.

J. H. Kim; S. H. Park; H. S. Hong; Y. H. Auh

2005-01-01

212

Unusual fungal niches.  

PubMed

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

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

213

CT of blunt chest trauma in children  

Microsoft Academic Search

While trauma is still the leading cause of death in the pediatric age range, it is surprising how little the CT appearances of pediatric chest injury have been investigated in the literature. We have reviewed the CT findings of blunt chest trauma in 44 children for whom chest CT examinations were requested to investigate the extent of intrathoracic injury. We

D. Manson; P. S. Babyn; S. Palder; K. Bergman

1993-01-01

214

Unusual malignant breast lesions: imaging-pathological correlations.  

PubMed

This pictorial essay presents the common radiological (mammography and/or ultrasonography) and pathological findings observed in unusual malignant breast lesions, which include well-differentiated subtypes of invasive ductal carcinoma not otherwise specified (tubular, mucinous, papillary, and medullary carcinomas), metaplastic carcinoma, and metastases. This study also includes unusual ultrasonographic appearances of a plasmacytoma. PMID:21948695

Karan, Belgin; Pourbagher, Ay?in; Bolat, Filiz Aka

2011-09-17

215

Cancer/testis (CT) antigens, carcinogenesis and spermatogenesis  

PubMed Central

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.

2011-01-01

216

CT of abdominal tuberculosis  

SciTech Connect

Intraabdominal tuberculosis (TB) presents with a wide variety of clinical and radiologic features. Besides the reported computed tomographic (CT) finding of high-density ascites in tuberculous peritonitis, this report describes additional CT features highly suggestive of abdominal tuberculosis in eight cases: (1) irregular soft-tissue densities in the omental area; (2) low-density masses surrounded by thick solid rims; (3) a disorganized appearance of soft-tissue densities, fluid, and bowel loops forming a poorly defined mass; (4) low-density lymph nodes with a multilocular appearance after intravenous contrast administration; and (5) possibly high-density ascites. The differential diagnosis of these features include lymphoma, various forms of peritonitis, peritoneal carcinomatosis, and peritoneal mesothelioma. It is important that the CT features of intraabdominal tuberculosis be recognized in order that laparotomy be avoided and less invasive procedures (e.g., laparoscopy, biopsy, or a trial of antituberculous therapy) be instituted.

Epstein, B.M. (Univ. of the Witwatersrand, Johannesburg, South Africa); Mann, J.H.

1982-11-01

217

Added diagnostic value of multiplanar reformation of multidetector CT data in patients with suspected appendicitis.  

PubMed

Computed tomography (CT) is an accurate and effective modality for the diagnosis and staging of appendicitis. CT provides rapid and complete evaluation of patients with suspected appendicitis and clearly demonstrates the typical findings of appendicitis, including a distended appendix, periappendiceal fat stranding, an appendicolith, and focal thickening of the cecum. Identification of an inflamed appendix at CT may be difficult in certain patients (eg, patients with scanty intraabdominal fat, an unusual location of the cecum and appendix, prominent cecal wall thickening and pericecal fat stranding, small bowel dilatation, or abscess formation adjacent to the right adnexa). In such cases, multiplanar reformation (MPR) of multidetector CT data may provide improved appendiceal visualization and increase the physician's confidence in diagnosing appendicitis. Moreover, the use of MPR in addition to conventional CT may provide improved visualization of the normal appendix and thereby enhance confidence in excluding appendicitis and diagnosing diseases that mimic appendicitis. Consequently, the radiologist should obtain MPR images in the evaluation of patients with suspected appendicitis to help ensure the correct diagnosis. PMID:18349447

Kim, Hyun Cheol; Yang, Dal Mo; Jin, Wook; Park, Seong Jin

218

CT enterography.  

PubMed

Conventional radiologic and endoscopic evaluations of the small bowel are often limited by the length, caliber, and motility of the small bowel loops. The development of new multidetector-row CT scanners, with faster scan times and isotropic spatial resolution, allows high-resolution multiphasic and multiplanar assessment of the bowel, bowel wall, and lumen. CT Enterography (CTE) is a variant of routine abdominal scanning, geared toward more sustained bowel filling with oral contrast material, and the use of multiplanar images, that can enhance gastrointestinal (GI) tract imaging. This article examines the techniques and clinical applications of CTE in comparison with CT enteroclysis, focusing on Crohn disease, obscure GI bleeding, GI tumors, acute abdominal pain, and bowel obstruction. PMID:20451821

Zamboni, Giulia A; Raptopoulos, Vassilios

2010-04-01

219

Ct scanner  

SciTech Connect

A ct scanner is described in which the data acquisition components, I.E. The radiation source and detectors, are mounted in an apertured housing which can be deployed generally vertically, for the examination of recumbent patients, or generally horizontally, for the examination of patients seated, or standing, with their torsos upright.

Bernardi, R.T.

1982-02-16

220

Lumbosacral spine CT  

MedlinePLUS

Spinal CT; CT - lumbosacral spine ... table that slides into the center of the CT scanner. You will need to lie on your ... creates a clearer image. In other cases, a CT of the lumbosacral spine may be done after ...

221

Unusual benign breast lesions.  

PubMed

The purpose of this article is to show examples of the radiological (mammography and/or ultrasound) and pathological appearances of unusual benign breast lesions. The conditions covered are granular cell tumours, fibromatosis, nodular fasciitis, myofibroblastomas, haemangiomas, neurofibromas, and leiomyomas. The article includes the first published description of the ultrasound appearance of a myofibroblastoma. Knowledge of these appearances may help confirm or refute radiological-pathological concordance of percutaneous biopsy results during multidisciplinary assessment of these lesions and aid patient management. PMID:16784941

Porter, G J R; Evans, A J; Lee, A H S; Hamilton, L J; James, J J

2006-07-01

222

CT SCANS OF ABDOMINAL TRAUMA IN CHILDREN  

Microsoft Academic Search

CT scans of a child's abdomen after blunt abdominal trauma have become a widely accepted technique for evaluating intra-abdominal organ injuries, because clinical findings of children may not reveal anything in such circumstances. This report reviews the CT findings over a 6 year period of 26 children under 15 years old with blunt abdomi- nal trauma at Maharaj Nakorn Chiang

Nuttaya Pattamapaspong; Pannee Visrutaratna

2005-01-01

223

CT Anatomy  

Microsoft Academic Search

\\u000a Usually, in normal subjects the peritoneum is not detectable on CT, because it is extremely thin. Only occasionally, and in\\u000a particular regions, do both parietal and visceral peritonea appear as a dense thin linear image with uniform thickness, when\\u000a it is limited on both sides by adipose tissue and is vertically oriented. This condition occurs in the case of the

Armando Rossi; Giorgio Rossi

224

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.

225

The bright choroid plexus on MR: CT and pathologic correlation.  

PubMed

Fourteen patients studied with MR imaging were found, incidentally, to have unusually bright, large choroid plexus glomera on T2-weighted sequences. A group of 167 patients was then examined retrospectively for size and intensity of the choroid plexus glomera on T2-weighted images. In the latter group of 167 patients, 66 (39.5%) had bright choroid plexus glomera. Of those who had bright choroid plexus glomera, eight of the 14 initial group and 11 of the 66 patients studied retrospectively had previous CT scans. The typical CT appearance of these bright glomera consisted of nonenhancing central regions of low (but not negative) attenuation with peripheral calcifications in the majority. The remainder showed noncalcified glomera. Fifty-two glomera were obtained at autopsy and examined retrospectively. Eight showed small, variably sized masses with lipid deposits, neuroepithelial microcysts, and peripheral psammoma body calcifications. One patient who died had a bright choroid plexus glomus on MR, and his glomera showed the same pathologic findings. The autopsy findings were believed to be typical pathologically for early xanthogranulomata formation. These early xanthogranulomatous changes appear to be of little clinical significance but must be differentiated from other lesions that can produce bright or enlarged choroid plexus glomera on MR. PMID:3132821

Hinshaw, D B; Fahmy, J L; Peckham, N; Thompson, J R; Hasso, A N; Holshouser, B; Paprocki, T

226

Unusual infections in humans.  

PubMed Central

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

Neafie, R C; Marty, A M

1993-01-01

227

Microscopic polyangiitis with unusual lung involvement.  

PubMed

Microscopic polyangiitis (MPA) is a non-granulomatous, systemic and small vessel vasculitis accompanied by segmental necrotizing glomerulonephritis with no evidence of other small vessel disease. We report a patient with weakness, fever, and arthralgia whose CXR and thoracic CT showed widespread nodular infiltration. His proteinase-3 anti-neutrophilic cytoplasmic antibody (c-ANCA) was positive. The serum creatinine was increased and haematuria subsequently developed. Renal biopsy revealed a focal segmental necrotizing glomerulonephritis which was compatible with MPA. He was treated with high-dose corticosteroid and cyclophosphamide. Because of a worsening CXR and hypoxaemia, mechanical ventilation was applied. Despite this he died of respiratory failure following 20 days of treatment. Nodular infiltration is an unusual radiological pattern in patients with MPA and is the reason for this report. PMID:16268925

Gülbay, Banu Eri?; Celik, Gökhan; Kumbasar, Ozlemözdemir; Gülbay, Mutlu; Alper, Doganay; Tulunay, Ozden

2005-11-01

228

Can hybrid FDG-PET\\/CT detect subclinical lymph node metastasis of esophageal cancer appropriately and contribute to radiation treatment planning? A comparison of image-based and pathological findings  

Microsoft Academic Search

Background  We aimed to determine the appropriateness of adding 18F-fluorodeoxyglucose (FDG)-positronemission tomography (PET) to computed\\u000a tomography (CT) and other pre-existing diagnostic imaging modalities for detecting subclinical lymph node metastasis of esophageal\\u000a cancer, by comparing images from these modalities with the results of histopathological analysis.\\u000a \\u000a \\u000a \\u000a Methods  Twenty patients who received radical surgery for squamous cell carcinoma of the esophagus were examined by PET-CT,

Shinichi Shimizu; Masao Hosokawa; Kazuo Itoh; Masahiro Fujita; Hiroaki Takahashi; Hiroki Shirato

2009-01-01

229

Intense and Diffuse Liver Uptake and Mild (Subtle) Multiple Skeletal Metastases on Bone Scintigraphy in a Patient with End-stage of Multiple Myeloma: Correlation with CT and MRI Findings  

Microsoft Academic Search

throughout the morrow, which produces a monoclonal immunoglobulin in the blood, urine or both, causing osteolyt- ic lesions in the bone marrow-bearing bone (2). We present a patient with an end-stage of multiple myeloma whose CT and bone survey showed multiple osteolytic lesions in the skeletal system; magnetic resonance imaging (MRI) showed multiple osteolytic lesions in vertebrae; and bone scintigraphy

Ching-Yuan Chen; Wei-Jen Shih; Primo Milan; George L. Shih

230

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

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

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

2011-01-01

231

Dynamics of Unusual Anharmonic Systems  

Microsoft Academic Search

Unusual vibrational properties for two different sorts of systems are studied theoretically. First, the T = 0 K nearly unstable host-defect system KI:Ag ^+ is considered. A harmonic perturbed shell model calculation predicts the existence of three nearly degenerate localized vibrational modes within the pure KI phonon gap. All three modes have very unusual displacement patterns strongly peaked on the

Kevin Wylie Sandusky

1994-01-01

232

An unusual case of death by lighting.  

PubMed

Lightning-related deaths are relatively uncommon, especially indoors. Some cases, involving unusual circumstances, may be of medicolegal relevance. We report a highly infrequent case of fulguration occurring inside a house in a country area. The deceased, a 55-year-old man, was struck by lightning while he was in his bed. Scene investigation and autopsy findings were equally important in finding out the cause of death. We think that the present case is of interest to forensic pathologists because what occurred might be difficult to clarify. PMID:9304849

Blanco-Pampín, J M; Peńaranda, J M; Boquete, R R; Carro, L C

1997-09-01

233

Penetrating spinal injury inflicted by screwdriver: unusual morphological findings  

Microsoft Academic Search

A 50-year-old female victim died of recurrent pulmonary embolism, 3 months after having received multiple screwdriver stab wounds in the neck and upper spine. Autopsy showed that one stab had penetrated the middle part of the cervical spinal cord and thus caused an incomplete tetraplegia. In the region of the healed spinal cord and the affected meninges, a considerable amount

F Schulz; H. J Colmant; K Trübner

1995-01-01

234

An unusual finding in a body recovered from the sea.  

PubMed

Post-mortem injuries caused by terrestrial and aquatic animals are commonly encountered in forensic practice. We present a case where an autopsy of a body recovered from the sea showed post-mortem injuries and numerous crustaceans in the heart and lungs. They have gained access to these organs via oro-nasal route and subsequent penetration through mediastinal soft tissues and migration down the trachea. PMID:20569960

Colombage, Senarath M; Telisinghe, P U

2010-07-01

235

CT demonstration of bilateral adrenal hemorrhage  

SciTech Connect

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.

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

1983-08-01

236

Helical CT of Blunt Diaphragmatic Rupture  

Microsoft Academic Search

OBJECTIVE. This study evaluated CT findings for signs of blunt diaphragmatic rupture. MATERIALS AND METHODS. CT examinations of 179 blunt trauma patients, includ- ing 11 with left-sided and five with right-sided blunt diaphragmatic rupture, were reviewed by two staff radiologists who first decided by consensus on the presence or absence of 11 pub- lished signs of blunt diaphragmatic rupture and

Alain Nchimi; David Szapiro; Benoît Ghaye; Valérie Willems; Jamil Khamis; Luc Haquet; Charlemagne Noukoua; Robert F. Dondelinger

237

18 F-FDG PET\\/CT bone\\/bone marrow findings in Hodgkin’s lymphoma may circumvent the use of bone marrow trephine biopsy at diagnosis staging  

Microsoft Academic Search

Purpose  Accurate staging of Hodgkin’s lymphoma (HL) is necessary in selecting appropriate treatment. Bone marrow trephine biopsy (BMB)\\u000a is the standard procedure for depicting bone marrow involvement. BMB is invasive and explores a limited part of the bone marrow.\\u000a 18F-FDG PET\\/CT is now widely used for assessing response to therapy in HL and a baseline study is obtained to improve accuracy.

Gerard Moulin-Romsee; Elif Hindié; Xavier Cuenca; Pauline Brice; Didier Decaudin; Myriam Bénamor; Josette Bričre; Marcela Anitei; Jean-Emmanuel Filmont; David Sibon; Eric de Kerviler; Jean-Luc Moretti

2010-01-01

238

Computed Tomographic Findings of Syphilitic Aortitis: A Case Report  

SciTech Connect

We describe the computerized tomographic (CT) findings of the aortic wall in a case of acute-phase syphilitic arteritis. The delayed phase of the contrast-enhanced CT shows a double-ring configuration of the thick thoracic aortic wall, which is similar to CT findings previously reported for Takayasu arteritis. We speculate that the resemblance of the CT findings for these two diseases accounts for their similar histopathological features.

Kimura, Fumiko; Satoh, Hideyuki; Sakai, Fumikazu; Nishii, Noriko; Tohda, Joe; Fujimura, Mikihiko [Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Department of Radiology (Japan); Haruta, Shoji [Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Department of Cardiology (Japan); Yamazaki, Kenji; Endo, Masahiro [Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Department of Cardiovascular Surgery (Japan); Sakomura, Yasunari [Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Department of Cardiology (Japan); Kurosama, Hiromi [Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Department of Cardiovascular Surgery (Japan); Kasanuki, Hiroshi [Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Department of Cardiology (Japan)

2004-03-15

239

Kaposi sarcoma in unusual locations  

PubMed Central

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.

Pantanowitz, Liron; Dezube, Bruce J

2008-01-01

240

NASA Reveals Most Unusual Planet  

NASA Video Gallery

In exploring the universe, NASA has uncovered one planet more unusual than all others. This 30 second video shows you which planet that is, and explains that NASA science helps us better understand this world without equal.

gsfcvideo

2010-07-01

241

An Automatic Diagnostic System for CT Liver Image Classification  

Microsoft Academic Search

Computed tomography (CT) images have been widely used for liver disease diagnosis. Designing and developing computer-assisted image processing techniques to help doctors improve their diagnosis has received considerable interests over the past years. In this paper, a CT liver image diagnostic classification system is presented which will automatically find, extract the CT liver boundary and further classify liver diseases. The

E-Liang Chen; Pau-Choo Chung; Ching-Liang Chen; Hong-Ming Tsai; Chein-I Chang

1998-01-01

242

CT of Renal and Perirenal Non-Hodgkin Lymphoma  

Microsoft Academic Search

The CT findings from a retrospective review of 16 patients (32 kidneys) with non- Hodgkin lymphoma involving the kidney are presented. In all cases, computed tomog- raphy (CT) accurately depicted the presence, location, and size of the renal lesions and provided information about the adjacent retroperitoneum. CT was helpful in evaluating the course of the disease and its response to

Syed Zafar; Hasan Jafri; Marco A. Amendola; Gary M. Glazer; Richard E. Schwab; Isaac R. Franci; Gil Borlaza

243

CT scanning of the heart  

SciTech Connect

It is generally agreed that all present diagnostic cardiac methods including echocardiography, nuclear medicine, and coronary arteriography have significant limitations. Nuclear cardiology provides excellent diagnostic sensitivity using small amounts of radioactive tracers, but it currently lacks the spatial fidelity needed to differentiate many anatomic structures in the heart. CT complements the capabilities of these alternative imaging modalities. Computed tomography offers accurate reconstruction of the whole myocardium with far greater spatial and density resolution in three dimensions. CT may eventually find its most important and clinically useful application in the diagnosis and management of heart disease.

Lipton, M.J.; Brundage, B.H.; Higgins, C.B.; Boyd, D.P.

1983-01-01

244

Testicular metastasis of colorectal carcinoma: an unusual presentation.  

PubMed

Metastasis of colorectal carcinoma to testis is rare. The authors report a case of 35-year-old man with right testicular mass. Contrast-enhanced CT scan (CECT) of testes showed testicular mass with ascitis and enlargement of retroperitoneal lymphnodes. Thus, a provisional diagnosis of disseminated primary testicular tumour was made. On subsequent high orchidectomy pathological examination revealed mucinous adenocarcinoma with CDX2 positivity thereby suggesting the possibility of metastasis from adenocarcinoma. Further, the diagnostic evaluation revealed a colorectal mass, which was inoperable (stage IV) and found to be primary colorectal mucinous adenocarcinoma. The authors conclude that occult colorectal carcinoma may rarely metastasise to testis and this unusual presentation may produce diagnostic dilemma. Although rare, metastases to testes should be considered as a differential diagnosis, especially where symptoms are unusual for primary malignancy. PMID:23440985

Verma, Nidhi; Babu, Suresh; Kushwaha, Jitendra Kumar; Singhai, Atin

2013-02-25

245

Scenes from the past: multidetector CT of Egyptian mummies of the Redpath Museum.  

PubMed

As a nondestructive method of historical and anthropologic inquiry, imaging has played an important role in mummy studies over the past several decades. Recent technologic advances have made multidetector computed tomography (CT) an especially useful means for deepening the present understanding of ancient cultures by examining preserved human remains. In April 2011, three ancient Egyptian human mummies from the Redpath Museum of McGill University were examined with 320-section multidetector CT as part of the IMPACT Radiological Mummy Database project headquartered at the University of Western Ontario. Whole-body scanning was performed with a section thickness of 0.5 mm and a peak voltage of 120 kVp, and the raw CT datasets were postprocessed by using smooth body and high-resolution bone convolution filters. Two of the mummies were scanned at different energy levels (80 and 135 keV). The high-resolution CT scans revealed the details of mummification and allowed observations about the socioeconomic and health status of the human subjects based on both the mummification technique used and the appearance of the remains, particularly the bones and teeth. The paleopathologic information obtained from the scans confirmed some findings in studies performed in the same mummies in the late 19th and 20th centuries. The CT scans also demonstrated a high degree of variability in Egyptian mortuary practice, variability that is not generally recognized in the literature. Unusual features that were observed included a relatively uncommon retained heart in mummy RM2718, retained lungs in a mummy from which the heart had been extracted (RM2720), and a cartonnage plaque placed over the left abdomen of a mummy that had been eviscerated transperineally (RM2717). PMID:22787004

Wade, Andrew D; Garvin, Gregory J; Hurnanen, Jaana H; Williams, Licd Lana; Lawson, Barbara; Nelson, Andrew J; Tampieri, Donatella

246

An unusual presentation of diabetic amyotrophy: myoclonus.  

PubMed

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

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

2013-02-04

247

An unusual presentation of macular amyloidosis.  

PubMed

Macular amyloidosis is a form of cutaneous amyloidosis characterized by dusky-brown lesions usually located on the upper back between the shoulder blades. This report describes the case of a 45 year-old female presenting with hyperpigmented macules and lace-like, non-pruritic erythema in the sacral and cervical region as well as on both arms and legs. Histology revealed amyloid deposits in the papillary dermis which exhibited apple-green birefringence after Congo red staining. There were no systemic findings. This is a case of macular amyloidosis with an unusual presentation. The literature on the subject is also reviewed. PMID:22068763

Melo, Bárbara Lima Araújo; Costa, Igor Santos; Goes, Clara de Assis Martins; Tigre, Celina Aguiar Frota; André, Nara Frota

248

Osteoid osteoma associated with the teeth: unusual presentation.  

PubMed

Osteoid osteoma is a rare benign osseous neoplasm which rarely affects the jaws. It is more common in long bones which can lead to postural scoliosis. The clinical characteristic feature of this tumour is the unexplained pain that is relieved by the intake of analgesics. Histologically it is characterized by the formation of central nidus with surrounding sclerotic bone. The diagnostic dilemma in this case report is aggravated by its unusual association with the teeth. The use of CT scanning is advised to distinguish from other odontogenic tumours. Treatment for this tumour is surgical removal or excisional biopsy to avoid recurrence and progression to malignant changes. PMID:22658497

Mohammed, I; Jannan, N A; Elrmali, A

2012-06-02

249

Unusual CNS infection from a subtorcular dermal sinus.  

PubMed

A 14-month-old toddler with a previously unrecognized dermal sinus tract presented with hydrocephalus and raised intracranial pressure. CT and MRI revealed a large posterior fossa dermoid mass. Cultures obtained from CSF and posterior fossa subdural empyema were positive for both Staphylococcus aureus and Escherichia coli. To the authors's knowledge, this is the first such report. Conclusion: This case suggests that children who present with CNS infections with unusual pathogens should be carefully evaluated for the presence of anatomic abnormalities including dermal sinus tracts. PMID:19912143

Kanev, P M; Salazar, J C

2009-11-12

250

CT scan (image)  

MedlinePLUS

CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the ... D image of a section through the body. CT scans are very detailed and provide excellent information ...

251

Knee CT scan  

MedlinePLUS

A computed tomography (CT) scan of the knee is test that uses x-rays to make detailed images of the knee. ... table that slides into the center of the CT scanner. When you are inside the scanner, the ...

252

Head CT (image)  

MedlinePLUS

CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the ... D image of a section through the body. CT scans are very detailed and provide excellent information ...

253

Unusual stab wound of the temporal region.  

PubMed

We report the case of an unusual penetrating injury of the temporal region of the head caused by knife. A long kitchen knife was protruding from the upper auricular area of the left temporal region of victims head. It cut through the posterosuperior part of the left auricula and remained fixed to the postauricular region. Brain computorized tomography (CT) scan revealed that the knife had reached deep into the petrous part of the temporal bone, and was directed toward the sulcus of the sigmoid sinus. There were no signs of intracranial bleeding. An otorhinolaryngologist and a neurosurgeon removed the knife in operating room, with the patient in general anesthesia. The audiogram obtained after 7 days of hospitalization showed left conductive hearing loss of 40 dB at frequencies up to 2 kHz, and of 90 dB above 2 kHz, probably due to hemotympanum caused by the operation. Control examinations performed 14 days and one month after discharge confirmed the patients complete recovery and no significant defects in his hearing or balance. We suggest multidisciplinary teamwork as a proper approach in the treatment of such injuries. PMID:11596178

Glunci?, I; Roje, Z; Tudor, M; Glunci?, V

2001-10-01

254

Gastrointestinal leiomyosarcoma — Unusual sites: Esophagus, colon and porta hepatis  

Microsoft Academic Search

This paper is based on a retrospective analysis of the radiologic findings of 6 newly proven cases of primary gastrointestinal leiomyosarcomas located in unusual sites. The radiographic and angiographic features of esophageal, colonic, and porta hepatis leiomyosarcomas are described and illustrated. General background information together with a brief review of the literature regarding these lesions are provided. The difficulties encountered

Emil J. Balthazar

1981-01-01

255

Practical CT dosimetry  

Microsoft Academic Search

The dose from computed tomography (CT) examinations is not negligible from a radiation safety standpoint. Occasionally, one encounters a case in which an unsuspected pregnant woman undergoes a CT pelvic scan, and the radiologist is required to estimate the dose to the fetus. This article addresses practical methods of CT dosimetry with a specific discussion on fetal dose estimate. Three

T. T. Yoshizumi; S. K. Suneja; J. S. Teal

1989-01-01

256

CT Angiography (CTA)  

MedlinePLUS

... various body parts, including: View larger with caption brain neck heart chest abdomen (such as the kidneys and ... of page • Videos CT angiography images of the brain and arteries to ... CT angiography images of the neck and arteries to ... Computed Tomography (CT)- Angiography Explained ...

257

An unusual case of bilateral granulomatous mastitis.  

PubMed

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

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

2013-05-23

258

Normalized CT Dose Index of the CT Scanners Used in the National Lung Screening Trial  

PubMed Central

The National Lung Screening Trial (NLST) includes 33 participating institutions, which performed 75, 133 lung cancer screening CT exams from 26,724 subjects during 2002–2007. For trial quality assurance reasons, CT radiation dose measurement data were collected from all multidetector-row CT scanners used in the NLST. A total of 247 measurements on 96 multi-row detector scanners were collected using a standard CT dose index (CTDI) measurement protocol. The scan parameters employed in the measurements (tube voltage, mAs and detector-channel configuration) were set according to trial-protocol for average size subjects. The normalized CTDIw (computed as CTDIw /mAs) obtained from each trial-participating scanner was tabulated. This study demonstrated a statistically significant difference in normalized CT dose index among CT scanner manufacturers, likely due to design differences such as filtration, bow-tie design and geometry. Our findings also indicated a statistically significant difference in normalized CT dose index among CT scanner models within GE, Siemens, and Philips. We also demonstrated a statistically significant difference in normalized CT dose index among all models and all manufacturers. And, we demonstrated a statistically significant difference in normalized CT dose index from CT scanners among manufacturers when grouped by 4 or 8 data channels vs 16, 32, or 64 channels, suggesting improved dose efficiency in more complex scanners. Average normalized CT dose index values varied by almost a factor of two across all scanners from all manufacturers. This study was focused on machine specific normalized CT dose index; patient dose and image quality were not addressed.

Cody, Dianna D.; Kim, Hyun-Jung; Cagnon, Christopher H.; Larke, Frederick J.; McNitt-Gray, Michael M.; Kruger, Randell L.; Flynn, Michael J.; Seibert, J. Anthony; Judy, Philip F.; Wu, Xizeng

2010-01-01

259

Radiation and chest CT scan examinations: what do we know?  

PubMed

In the past 3 decades, the total number of CT scans performed has grown exponentially. In 2007, > 70 million CT scans were performed in the United States. CT scan studies of the chest comprise a large portion of the CT scans performed today because the technology has transformed the management of common chest diseases, including pulmonary embolism and coronary artery disease. As the number of studies performed yearly increases, a growing fraction of the population is exposed to low-dose ionizing radiation from CT scan. Data extrapolated from atomic bomb survivors and other populations exposed to low-dose ionizing radiation suggest that CT scan-associated radiation may increase an individual's lifetime risk of developing cancer. This finding, however, is not incontrovertible. Because this topic has recently attracted the attention of both the scientific community and the general public, it has become increasingly important for physicians to understand the cancer risk associated with CT scan and be capable of engaging in productive dialogue with patients. This article reviews the current literature on the public health debate surrounding CT scan and cancer risk, quantifies radiation doses associated with specific studies, and describes efforts to reduce population-wide CT scan-associated radiation exposure. CT scan examinations of the chest, including CT scan pulmonary and coronary angiography, high-resolution CT scan, low-dose lung cancer screening, and triple rule-out CT scan, are specifically considered. PMID:22948579

Sarma, Asha; Heilbrun, Marta E; Conner, Karen E; Stevens, Scott M; Woller, Scott C; Elliott, C Gregory

2012-09-01

260

An Unusual Cause of Coma  

PubMed Central

This case report is an unusual presentation of fibroid uterus as coma. The patient developed a recurrent hypoglycemia possibly secondary to the insulin-like growth factor secreted from the fibroid. The hypoglycemic symptoms disappeared on removal of the fibroid. The histopathological examination revealed no evidence of malignancy.

Ovallath, Sujith; Raj, R. S.; Rahman, Abdu; Girija, A. S.

2012-01-01

261

Unusual scrotal pathology: an overview  

Microsoft Academic Search

The diverse embryological origins of the contents of the scrotum create an environment that fosters a wide variety of unusual pathologies. Most scrotal pathologies are discovered by the patient and are initially evaluated by a thorough physical examination and scrotal ultrasonography. Scrotal lesions can be broadly grouped by the anatomical location in which they develop; the clinician must consider a

Henry M. Rosevear; Alek Mishail; Yefim Sheynkin; Moshe Wald

2009-01-01

262

Unusual psychiatric syndromes: an introduction  

Microsoft Academic Search

Unusual’ and ‘new’ illnesses such as Gulf War syndrome, myalgic encephalomyelitis (ME), gender identity disorder (and the probably related apotemnophilia) may suddenly appear or become recognized in the major Euro-American centres of psychiatric research and training, or they may through globalization migrate or become recognized beyond these centres (as with anorexia nervosa now appearing in South Asia). Illnesses are often

Roland Littlewood

2004-01-01

263

Computed tomographic findings in penetrating peptic ulcer  

SciTech Connect

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.

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

1984-12-01

264

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

SciTech Connect

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.

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

1994-02-01

265

Wrist: Different views in CT scanning  

PubMed Central

Summary This study tests various acquisition and reconstruction protocols for MDCT of the wrist to determine the optimal views in wrist imaging. These views include: wrist in prone position, perpendicularly to CT gantry; wrist in prone position with internal and external deviation of the hand and PA wrist image reformatted in CT workstations along the axis of the scaphoid bone. Among these different views of wrist CT, the axial image reformatted along the long axis of the scaphoid provides us with the best diagnostic findings of the scaphoid.

Assi, Abed-Al Nasser

2011-01-01

266

Visualising noncalcified coronary plaques by CT  

Microsoft Academic Search

Due to a rapid improvement of the new generation submillimetre multislice CT-technology noninvasive tomographic imaging of the coronary vessel wall has become reality. First clinical studies have shown the ability in particular of 16-slice CT to determine plaque burden, plaque composition and compensatory vessel-wall remodelling. These novel findings already constitute an important step forward to assess coronary atherosclerosis noninvasively in

Alexander W. Leber; Andreas Knez; Alexander Becker; Christoph Becker; Maximilian Reiser; Gerhard Steinbeck; Peter Boekstegers

2005-01-01

267

Technical Information Program Summary: Unusual Occurrence Reports.  

National Technical Information Service (NTIS)

Unusual Occurrence Reports (UOR's) are documents issued by Westinghouse Hanford Company and other Department of Energy contractors to identify, report and evaluate unusual or unplanned events and to describe action to correct and prevent similar events fr...

1979-01-01

268

Temporal bone computed tomography findings in bilateral sensorineural hearing loss  

Microsoft Academic Search

AIMTo examine the yield of computed tomography (CT) of the temporal bones when investigating sensorineural hearing loss (SNHL) and to identify factors associated with CT findings.METHODSRetrospective analysis of 116 consecutively investigated children with bilateral SNHL at the audiology department of Great Ormond Street Hospital, London. Main outcome measures were CT results, hearing loss parameters, history, and clinical examination.RESULTSA total of

D E Bamiou; P Phelps; T Sirimanna

2000-01-01

269

Unusual traits associated with Robinow syndrome.  

PubMed Central

We report on some members of two unrelated families showing the characteristic features of Robinow syndrome. In a consanguineous Kuwaiti family, the index case with Robinow syndrome showed some unusual features including severe IUGR, laxity of ligaments, hyperextensible joints, redundant skin folds, severe normocytic anaemia, repeated infection, increased percentage of total T cells and CD4 positive population, reduced percentage of CD8 positive cells, and EMG abnormality. In a Pakistani family with a high degree of multigenerational consanguinity, a single case with the Robinow phenotype also had congenital heart disease, mainly involving the right side of the heart, with pulmonary stenosis, tricuspid atresia, ASD, VSD, double outlet right ventricle, and right atrial isomerism. This report suggests that the disease profile of Robinow syndrome may be extended to accommodate the unusual traits mentioned above. The association of the Robinow phenotype with congenital heart disease in case 2 of this report is consistent with the previously reported finding that congenital heart disease, particularly involving the right side of the heart, may be a prominent component of Robinow syndrome in a subset of patients. Images

Sabry, M A; Ismail, E A; al-Naggar, R L; al-Torki, N A; Farah, S; al-Awadi, S A; Obenbergerova, D; Bastaki, L

1997-01-01

270

Left ventricular hydatid cyst: An unusual location of Echinococcus granulosus with multiple organ involvement  

Microsoft Academic Search

Cardiac Echinococcus is rare but usually associated with fatal complications. An unusual case of cardiac hydatid cyst with multiple organ involvement is presented in which transesophageal echocardiography provided additional information and confirmed transthoracic echocardiographic findings.

Dursun Atilgan; Seref Demirel; Vakur Akkaya; Ferruh Korkut

1996-01-01

271

An unusual cause of syncope  

PubMed Central

We present an unusual cause of recurrent syncope in a man in his 50s. He worked as a metallurgist and suffered syncopal events in his poorly ventilated workshop. A detailed history revealed that he used several solvents and chemicals at work and often kept workplace windows closed; he also smoked cannabis in his workshop. Physical examination was unremarkable. Investigations for prior haematemesis had shown oesophageal varices, cirrhosis and portal hypertension. An electrocardiogram (ECG), 24 hour ECG and an echocardiogram were normal. Liver biopsy showed steatohepatitis and cirrhosis consistent with toxic metabolic injury. He was advised to improve ventilation in his work environment following which he had no further episodes. The episodes of syncope were diagnosed to be secondary to effects of solvent inhalation compounded by effects of cannabis in a poorly ventilated workshop. This report illustrates the importance of eliciting an accurate social and occupational history in unusual cases.

Nair, Priya; Robertson, Alan; MacWalter, Ronald

2009-01-01

272

Unusual ligand coordination for cesium  

SciTech Connect

When complexed by tetrabenzo-24-crown-8, the cesium ion can accommodate unprecedented ligation. The structures of the complexes are presented. These structures are the first reported examples of linear {eta}{sup 2}-acetonitrile coordination to any metal ion and the first structures illustrating {eta}{sup 2}-acetonitrile and dichloromethane ligation to an alkali metal ion. Possible steric and electronic origins of these unusual metal-ligand interactions are discussed.

Bryan, J.C.; Kavallieratos, K.; Sachleben, R.A.

2000-04-03

273

An unusual intaocular foreign body.  

PubMed

An unusual foreign body in a 60-year-old man with ocular siderosis is described. A surgical needle was found in the eye after magnetic resonance imaging was performed for cerebral ischemia. As a general precaution in patients who have undergone any kind of surgery, it might be better to perform a plain x-ray before performing magnetic resonance imaging to identify such foreign bodies. PMID:12875470

Romano, Antonio; Rosa, Nicola; Bifani, Mario; Della Corte, Michele; Iaccarino, Gennarfrancesco

274

Unusual phenomenology of autoerotic fatalities  

Microsoft Academic Search

Between 1983 and 2003 forty accidental autoerotic deaths (all males, 13–79 years old) have been investigated at the Institute of Legal Medicine in Hamburg. Three cases with a rather unusual scenery are described in detail: (1) a 28-year-old fireworker was found hanging under a bridge in a peculiar bound belt system. The autopsy and the reconstruction revealed signs of asphyxiation,

E. Koops; W. Janssen; S. Anders; K. Püschel

2005-01-01

275

Unusual F-18 FDG Uptake at the Ears of a Patient with Discoid Lupus Erythematosus Diskoid Lupus Eritamatozus  

PubMed Central

A 55-year-old patient, who had undergone excisional biopsy of upper lip two years ago and diagnosed to have squamous cell carcinoma, was referred to us for evaluation with Fluorine-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography (PET)/CT (F-18 FDG-PET/CT) scan. F-18 FDG-PET/CT scan was performed and the maximum intensity projection images (MIP) showed unusual FDG uptake at both ears. Histopathological examination of the biopsy specimen obtained from the ears revealed discoid lupus erythematosus (DLE). Conflict of interest:None declared.

Ozulker, Tamer; Ozulker, Filiz; Cebeci, Filiz; Somay, Adnan; Tatoglu, Mehmet Tar?k; Ozpacac?, Tevfik

2012-01-01

276

Unusual F-18 FDG Uptake at the Ears of a Patient with Discoid Lupus Erythematosus Diskoid Lupus Eritamatozus.  

PubMed

A 55-year-old patient, who had undergone excisional biopsy of upper lip two years ago and diagnosed to have squamous cell carcinoma, was referred to us for evaluation with Fluorine-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography (PET)/CT (F-18 FDG-PET/CT) scan. F-18 FDG-PET/CT scan was performed and the maximum intensity projection images (MIP) showed unusual FDG uptake at both ears. Histopathological examination of the biopsy specimen obtained from the ears revealed discoid lupus erythematosus (DLE). Conflict of interest:None declared. PMID:23487392

Ozülker, Tamer; Ozülker, Filiz; Cebeci, Filiz; Somay, Adnan; Tato?lu, Mehmet Tar?k; Ozpaçac?, Tevfik

2012-04-01

277

Primary lymphoma of the colon and rectum: CT and barium enema correlation  

Microsoft Academic Search

This paper presents the computed tomographic (CT) and barium enema (BE) findings in seven patients with proven primary lymphoma of the colon and rectum. CT and BE examination are complimentary studies in the evaluation of primary lymphoma of the colorectum, and certain relevant findings may be missed when radiographic evaluation does not include both modalities. Both CT and barium studies

Susan H. Wyatt; Elliot K. Fishman; Bronwyn Jones

1993-01-01

278

Practical CT dosimetry  

SciTech Connect

The dose from computed tomography (CT) examinations is not negligible from a radiation safety standpoint. Occasionally, one encounters a case in which an unsuspected pregnant woman undergoes a CT pelvic scan, and the radiologist is required to estimate the dose to the fetus. This article addresses practical methods of CT dosimetry with a specific discussion on fetal dose estimate. Three methods are described: (1) the use of a dose chart, (2) the pencil ionization chamber method, and (3) the thermoluminescence dosimetry (TLD) method.

Yoshizumi, T.T.; Suneja, S.K.; Teal, J.S. (Howard Univ. Hospital, Washington, DC (USA))

1989-07-01

279

CT urography for hematuria.  

PubMed

Hematuria can signify serious disease such as bladder cancer, upper urinary tract urothelial cell carcinoma (UUT-UCC), renal cell cancer or urinary tract stones. CT urography is a rapidly evolving technique made possible by recent advances in CT technology. CT urography is defined as CT examination of the kidneys, ureters and bladder with at least one series of images acquired during the excretory phase after intravenous contrast administration. The reasoning for using CT urography to investigate hematuria is based on its high diagnostic accuracy for urothelial cell carcinoma (UCC) and favorable comparison with other imaging techniques. The optimum diagnostic imaging strategy for patients with hematuria at high-risk for UCC involves the use of CT urography as a replacement for other imaging tests (ultrasonography, intravenous urography, or retrograde ureteropyelography) and as a triage test for cystoscopy, resulting in earlier diagnosis and improved prognosis of bladder cancer, UUT-UCC, renal cell cancer and stones. Current problems with CT urography for investigating hematuria might be solved with a formative educational program simulating clinical reporting to reduce reader error, and a new technique for image-guided biopsy of UUT-UCC detected by CT urography for histopathological confirmation of diagnosis and elimination of false-positive results. CT urography is recommended as the initial imaging test for hematuria in patients at high-risk for UCC. PMID:22410682

Cowan, Nigel C

2012-03-13

280

CT in the diagnosis of enterovesical fistulae  

SciTech Connect

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.

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

1985-06-01

281

Unusual Foreign Body of Parotid Gland Presenting as Sialolithiasis: Case Report and Literature Review  

PubMed Central

This case report highlights an unusual case where a foreign body in the parotid gland was initially thought to be sialolithiasis based on CT scans. The foreign body was safely retrieved from the parotid gland without formal superficial parotidectomy using methylene blue and an image intensifier to localize the lesion. Diagnosis and management of foreign bodies in the parotid gland are reviewed, and surgical options in removal of such lesions are discussed.

Sreetharan, Sivapatha Sundaram; Philip, Rajan

2012-01-01

282

PET/CT vs. non-contrast CT alone for surveillance 1-year post lobectomy for stage I non-small-cell lung cancer  

PubMed Central

18F-FDG PET/CT was compared with non-contrast chest CT in monitoring for recurrence 1-year after lobectomy of stage 1 non-small-cell lung cancer (NSCLC). For surveillance after treatment with curative intent, current (April 2012) National Comprehensive Cancer network guidelines recommend chest CT with or without contrast every 6-12 months for 2 years, then non-contrast chest CT annually. PET/CT is not currently indicated for routine follow-up. One hundred patients receiving surveillance PET/CT 1-year after lobectomy for the treatment of stage 1a or 1b NSCLC were included in the study. Exclusion criteria included the presence or interval diagnosis of a second malignancy, or surgical treatment more radical than single lobectomy. The non-contrast CT obtained from the 1-year PET/CT was interpreted by an experienced chest radiologist blinded to the PET/CT for evidence of recurrence using the following findings: pulmonary nodule, pleural effusion, pleural mass, adenopathy, and extrathoracic mass. The ecision about recurrence was made solely from the non-contrast CT without PET/CT findings. This was compared with the determination made with PET/CT. The reference standard for determination of recurrence was the multi-disciplinary tumor board who had access to all imaging and clinical data. Recurrence at 1 year was documented in 16 of 90 patients. All 16 recurrences were documented with PET/CT and 9 were found with non-contrast CT. Five of the 7 recurrences missed with non-contrast CT were extrathoracic metastases. Sensitivity of CT and PET/CT for recurrence was 56.3% and 100%, respectively (p = 0.015). Specificity of CT and PET/CT for recurrence was 95.9% and 93.2%, respectively (p = 0.62).

Dane, Bari; Grechushkin, Vadim; Plank, April; Moore, William; Bilfinger, Thomas

2013-01-01

283

PET/CT vs. non-contrast CT alone for surveillance 1-year post lobectomy for stage I non-small-cell lung cancer.  

PubMed

(18)F-FDG PET/CT was compared with non-contrast chest CT in monitoring for recurrence 1-year after lobectomy of stage 1 non-small-cell lung cancer (NSCLC). For surveillance after treatment with curative intent, current (April 2012) National Comprehensive Cancer network guidelines recommend chest CT with or without contrast every 6-12 months for 2 years, then non-contrast chest CT annually. PET/CT is not currently indicated for routine follow-up. One hundred patients receiving surveillance PET/CT 1-year after lobectomy for the treatment of stage 1a or 1b NSCLC were included in the study. Exclusion criteria included the presence or interval diagnosis of a second malignancy, or surgical treatment more radical than single lobectomy. The non-contrast CT obtained from the 1-year PET/CT was interpreted by an experienced chest radiologist blinded to the PET/CT for evidence of recurrence using the following findings: pulmonary nodule, pleural effusion, pleural mass, adenopathy, and extrathoracic mass. The ecision about recurrence was made solely from the non-contrast CT without PET/CT findings. This was compared with the determination made with PET/CT. The reference standard for determination of recurrence was the multi-disciplinary tumor board who had access to all imaging and clinical data. Recurrence at 1 year was documented in 16 of 90 patients. All 16 recurrences were documented with PET/CT and 9 were found with non-contrast CT. Five of the 7 recurrences missed with non-contrast CT were extrathoracic metastases. Sensitivity of CT and PET/CT for recurrence was 56.3% and 100%, respectively (p = 0.015). Specificity of CT and PET/CT for recurrence was 95.9% and 93.2%, respectively (p = 0.62). PMID:24116349

Dane, Bari; Grechushkin, Vadim; Plank, April; Moore, William; Bilfinger, Thomas

2013-09-19

284

Haemodynamic Evaluation of Cerebral Gliomas Using XeCT  

Microsoft Academic Search

Summary   The purpose of this study was to characterize regional blood flow (BF) in untreated cerebral gliomas (CG) using stable Xe-enhanced\\u000a computed tomography (XeCT). XeCT of 38 patients with untreated CG were analyzed and compared with CT and magnetic resonance\\u000a images (MRI) and histopathological findings. Individual averaged BF values for tumour in 29 high grade gliomas (HGGs) and\\u000a 9 low

T. Nakagawa; R. Tanaka; S. Takeuchi; N. Takeda

1998-01-01

285

Rock Finding  

ERIC Educational Resources Information Center

|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…

Rommel-Esham, Katie; Constable, Susan D.

2006-01-01

286

CT and MR image fusion for CSF leak diagnosis  

NASA Astrophysics Data System (ADS)

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.

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

2008-04-01

287

Inorganic materials using 'unusual' microorganisms.  

PubMed

A promising avenue of research in materials science is to follow the strategies used by Mother Nature to fabricate ornate hierarchical structures as exemplified by organisms such as diatoms, sponges and magnetotactic bacteria. Some of the strategies used in the biological world to create functional inorganic materials may well have practical implications in the world of nanomaterials. Therefore, the strive towards exploring nature's ingenious work for designing strategies to create inorganic nanomaterials in our laboratories has led to development of biological and biomimetic synthesis routes over the past decade or so. A large proportion of these relentless efforts have explored the use of those microorganisms, which are typically not known to encounter these inorganic materials in their natural environment. Therefore, one can consider these microorganisms as 'unusual' for the purpose for which they have been utilized - it is in this context that this review has been penned down. In this extensive review, we discuss the use of these 'unusual' microorganisms for deliberate biosynthesis of various nanomaterials including biominerals, metals, sulfides and oxides nanoparticles. In addition to biosynthesis approach, we have also discussed a bioleaching approach, which can provide a noble platform for room-temperature synthesis of inorganic nanomaterials using naturally available raw materials. Moreover, the unique properties and functionalities displayed by these biogenic inorganic materials have been discussed, wherever such properties have been investigated previously. Finally, towards the end of this review, we have made efforts to summarize the common outcomes of the biosynthesis process and draw conclusions, which provide a perspective on the current status of the biosynthesis research field and highlights areas where future research in this field should be directed to realize the full potential of biological routes towards nanomaterials synthesis. Furthermore, the review clearly demonstrates that the biological route to inorganic materials synthesis is not merely an addition to the existing list of synthesis routes; biological routes using 'unusual' microorganisms might in fact provide an edge over other nanomaterials synthesis routes in terms of their eco-friendliness, low energy intensiveness, and economically-viable synthesis. This review has significant importance for colloids and interface science since it underpins the synthesis of colloidal materials using 'unusual' microorganism, wherein the role of biological interfaces for controlled synthesis of technologically important nanomaterials is clearly evident. PMID:22818492

Bansal, Vipul; Bharde, Atul; Ramanathan, Rajesh; Bhargava, Suresh K

2012-07-04

288

Unusual aspirations in fire death.  

PubMed

In fire death cases the usual aspiration in the trachea and bronchi is soot, and this provides indisputable evidence that the decedent had inhaled smoke and had thus been alive in the fire. In some fire death cases, however, fire fighting material such as water or the material in the fire extinguisher, or some foreign bodies such as small metallic pieces of the melted window-frame, may be seen in the trachea and bronchi, and these unusual aspirations may provide the evidence that the decedent had been alive for a while in the flame. PMID:7705738

Suzuki, T; Takahashi, H; Umetsu, K

1995-03-21

289

Computed Tomography (CT) Standards  

SciTech Connect

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.

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

2000-02-02

290

Association of a novel functional promoter variant (rs2075533 C>T) in the apoptosis gene TNFSF8 with risk of lung cancer--a finding from Texas lung cancer genome-wide association study.  

PubMed

Published genome-wide association studies (GWASs) have identified few variants in the known biological pathways involved in lung cancer etiology. To mine the possibly hidden causal single nucleotide polymorphisms (SNPs), we explored all SNPs in the extrinsic apoptosis pathway from our published GWAS dataset for 1154 lung cancer cases and 1137 cancer-free controls. In an initial association analysis of 611 tagSNPs in 41 apoptosis-related genes, we identified only 10 tagSNPs associated with lung cancer risk with a P value<10(-2), including four tagSNPs in DAPK1 and three tagSNPs in TNFSF8. Unlike DAPK1 SNPs, TNFSF8 rs2181033 tagged other four predicted functional but untyped SNPs (rs776576, rs776577, rs31813148 and rs2075533) in the promoter region. Therefore, we further tested binding affinity of these four SNPs by performing the electrophoretic mobility shift assay. We found that only rs2075533T allele modified levels of nuclear proteins bound to DNA, leading to significantly decreased expression of luciferase reporter constructs by 5- to -10-fold in H1299, HeLa and HCT116 cell lines compared with the C allele. We also performed a replication study of the untyped rs2075533 in an independent Texas population but did not confirm the protective effect. We further performed a mini meta-analysis for SNPs of TNFSF8 obtained from other four published lung cancer GWASs with 12 ?214 cases and 47? 721 controls, and we found that only rs3181366 (r2=0.69 with the untyped rs2075533) was associated to lung cancer risk (P=0.008). Our findings suggest a possible role of novel TNFSF8 variants in susceptibility to lung cancer. PMID:21292647

Wei, Sheng; Niu, Jiangong; Zhao, Hui; Liu, Zhensheng; Wang, Li-E; Han, Younghun; Chen, Wei V; Amos, Christopher I; Rafnar, Thorunn; Sulem, Patrick; Stefansson, Kari; Landi, Maria T; Caporaso, Neil E; Albanes, Demetrius; Thun, Michael J; McKay, James D; Brennan, Paul; Wang, Yufei; Houlston, Richard S; Spitz, Margaret R; Wei, Qingyi

2011-02-02

291

Association of a novel functional promoter variant (rs2075533 C>T) in the apoptosis gene TNFSF8 with risk of lung cancer--a finding from Texas lung cancer genome-wide association study  

PubMed Central

Published genome-wide association studies (GWASs) have identified few variants in the known biological pathways involved in lung cancer etiology. To mine the possibly hidden causal single nucleotide polymorphisms (SNPs), we explored all SNPs in the extrinsic apoptosis pathway from our published GWAS dataset for 1154 lung cancer cases and 1137 cancer-free controls. In an initial association analysis of 611 tagSNPs in 41 apoptosis-related genes, we identified only 10 tagSNPs associated with lung cancer risk with a P value <10?2, including four tagSNPs in DAPK1 and three tagSNPs in TNFSF8. Unlike DAPK1 SNPs, TNFSF8 rs2181033 tagged other four predicted functional but untyped SNPs (rs776576, rs776577, rs31813148 and rs2075533) in the promoter region. Therefore, we further tested binding affinity of these four SNPs by performing the electrophoretic mobility shift assay. We found that only rs2075533T allele modified levels of nuclear proteins bound to DNA, leading to significantly decreased expression of luciferase reporter constructs by 5- to –10-fold in H1299, HeLa and HCT116 cell lines compared with the C allele. We also performed a replication study of the untyped rs2075533 in an independent Texas population but did not confirm the protective effect. We further performed a mini meta-analysis for SNPs of TNFSF8 obtained from other four published lung cancer GWASs with 12 ?214 cases and 47? 721 controls, and we found that only rs3181366 (r2 = 0.69 with the untyped rs2075533) was associated to lung cancer risk (P = 0.008). Our findings suggest a possible role of novel TNFSF8 variants in susceptibility to lung cancer.

Wei, Sheng; Niu, Jiangong; Zhao, Hui; Liu, Zhensheng; Wang, Li-E; Han, Younghun; Chen, Wei V.; Amos, Christopher I.; Rafnar, Thorunn; Sulem, Patrick; Stefansson, Kari; Landi, Maria T.; Caporaso, Neil E.; Albanes, Demetrius; Thun, Michael J.; McKay, James D.; Brennan, Paul; Wang, Yufei; Houlston, Richard S.; Spitz, Margaret R.; Wei, Qingyi

2011-01-01

292

CT features of nonfunctioning islet cell carcinoma  

SciTech Connect

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.

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

1984-11-01

293

Cutaneous sporotrichosis: unusual clinical presentations.  

PubMed

Three unusual clinical forms of sporotrichosis described in this paper will be a primer for the clinicians for an early diagnosis and treatment, especially in its unusual presentations. Case 1, a 52-year-old man, developed sporotrichosis over pre-existing facial nodulo-ulcerative basal cell carcinoma of seven-year duration, due to its contamination perhaps from topical herbal pastes and lymphocutaneous sporotrichosis over right hand/forearm from facial lesion/herbal paste. Case 2, a 25-year-old woman, presented with disseminated systemic-cutaneous, osteoarticular and possibly pleural (effusion) sporotrichosis. There was no laboratory evidence of tuberculosis and treatment with anti-tuberculosis drugs (ATT) did not benefit. Both these cases were diagnosed by histopathology/culture of S. schenckii from tissue specimens. Case 3, a 20-year-old girl, had multiple intensely pruritic, nodular lesions over/around left knee of two-year duration. She was diagnosed clinically as a case of prurigo nodularis and histologically as cutaneous tuberculosis, albeit, other laboratory investigations and treatment with ATT did not support the diagnosis. All the three patients responded well to saturated solution of potassium iodide (SSKI) therapy. A high clinical suspicion is important in early diagnosis and treatment to prevent chronicity and morbidity in these patients. SSKI is fairly safe and effective when itraconazole is not affordable/available. PMID:20445301

Mahajan, Vikram K; Sharma, Nand Lal; Shanker, Vinay; Gupta, Poonam; Mardi, Kavita

294

Apical hypertrophic cardiomyopathy with unusual features in a Greek woman.  

PubMed

We present a Mediterranean female patient with abnormal electrocardiographic findings and a history of shortness of breath during excessive effort (NYHA I) in whom apical hypertrophic cardiomyopathy with unusual features was detected by echocardiography and magnetic resonance imaging. There was a single fused apical hypertrophic papillary muscle and akinesia of the left ventricular apical segment. Abnormal left ventricular filling was also detected by Doppler echocardiography. PMID:7933557

Kranidis, A; Filippatos, G; Mavrogeni, S; Kostopoulos, K; Kappos, K; Kardaras, F; Fehske, W; Anthopoulos, L

1994-05-01

295

SNOMED CT in pathology.  

PubMed

Pathology information systems have been using SNOMED II for many years, and in most cases, they are in a migration process to SNOMED CT. COST Action IC0604 (EURO-TELEPATH) has considered terminology normalization one of its strategic objectives. This paper reviews the use of SNOMED CT in healthcare, with a special focus in pathology. Nowadays, SNOMED CT is mainly used for concept search and coding of clinical data. Some ontological errors found in SNOMED CT are described. The Integrating the Healthcare Enterprise (IHE) initiative has fostered the use of SNOMED CT, also in Pathology, as recommended in the Supplement Anatomic Pathology Structured Reports of the IHE Anatomic Pathology Technical Framework. Rule governing concept post-coordination is also described. Some recent initiatives are trying to define a SNOMED CT subset for Pathology. The Spanish Society of Pathology has defined a subset for specimens and procedures in Pathology. Regarding diagnosis coding, the morphological abnormality sub-hierarchy of SNOMED CT need to be significantly extended and improved to become useful for pathologists. A consensus is needed to encode pathology reports with the adequate hierarchies and concepts. This will make the implementation of pathology structured reports more feasible. PMID:22925793

García-Rojo, Marcial; Daniel, Christel; Laurinavicius, Arvydas

2012-01-01

296

CT Diagnosis of Blunt Pancreatic Trauma: Importance of Detecting Fluid  

Microsoft Academic Search

OBJECTIVE. The purpose of this study was to determine the value of detecting fluid between the splenic vein and the pancreas on CT scans in the diagnosis of pancreatic Injury after blunt abdominal trauma. MATERIALS AND METHODS. We retrospectively reviewed the abdominal CT scans of 10 patients with surgical- or autopsy-proved pancreatic injury after blunt abdomi- nal trauma. The finding

Robert E. Mindelzun; Jeet S. Sandhu; Vincent D. McCormick; R. Brooke Jeffrey

297

Multi-phase CT enterography in obscure GI bleeding.  

PubMed

Multiphase CT enterography is a modification of conventional abdominal CT designed to optimize detection of abnormalities responsible for obscure GI bleeding. This imaging test appears to be complimentary to wireless capsule endoscopy in the evaluation of this difficult group of patients. A description of exam technique, findings, and discussion of results will be presented in this article. PMID:18493814

Huprich, James E

298

Primary and secondary histiocytic lymphoma of the brain: CT features.  

PubMed

The authors examined 19 patients with diffuse histiocytic lymphoma of the brain, including 8 with primary disease and 11 with secondary disease. Both primary disease and secondary disease involving the brainstem and deep nuclei exhibited the characteristic CT appearance, consisting of a large, solid, homogeneously enhanced mass with varying amounts of edema. However, most secondary lymphomas outside the brainstem and basal ganglia contained large areas of low attenuation consistent with necrosis. Multifocal lesions were seen only in patients with secondary lymphoma. Systemic chemotherapy for extracranial lymphoma had no effect on the CT appearance of intracranial lesions. The authors suggest that these "unusual" CT patterns are actually typical of a distinct subset of histiocytic lymphomas. PMID:3881792

Yang, P J; Knake, J E; Gabrielsen, T O; Latack, J T; Gebarski, S S; Mehta, B A; Metes, J J

1985-03-01

299

Craniofacial mucormycosis: computed tomographic and angiographic findings in two cases.  

PubMed

Two cases of craniofacial mucormycosis are presented, stressing computed tomographic (CT) and angiographic findings. In the first case, successful embolization of a sphenopalatine artery pseudoaneurysm is shown. The second case demonstrates CT findings of ethmoidal sinus and frontal lobe inflammatory change. Ophthalmic artery occlusion is show. Obstructive venous changes within the orbit and cavernous sinus are displayed by means of orbital venography. PMID:7232728

Lazo, A; Wilner, H I; Metes, J J

1981-06-01

300

CT features of pleural masses and nodules.  

PubMed

Pleural space masses and nodules are rarely described on computed tomography (CT) in veterinary medicine and have only been described in patients with neoplasia. Our purpose was to describe the CT findings and diagnoses in seven patients with pleural masses and nodules. Two patients had broad-based, plaque-like pleural masses, both of which were due to neoplasia (primary pleural carcinoma, metastatic thymoma). Two patients had well-defined pleural nodules and nodular pleural thickening, one of which had mesothelial hypertrophy, and another of which had metastatic hemangiosarcoma. Three patients had ill-defined pleural nodules to nodular pleural thickening, one of which had metastatic pulmonary carcinoma, while the other two had bacterial infection with mesothelial proliferation (n = 2), fibrinous pleuritis (n = 1), and severe mediastinal pleuritis/mediastinitis (n = 2). Five of the seven patients had focal, multifocal or diffuse smooth, and/or irregular pleural thickening. Five of seven patients had pleural effusion, and postcontrast CT was useful in several patients for delineating the pleural lesions from the effusion. All patients except one had additional lesions identified on CT besides those in the pleural space. CT is useful in identifying and characterizing pleural space lesions and could be used to guide further diagnostic procedures such as thoracoscopy or exploratory thoracotomy. Both neoplastic and nonneoplastic diseases should be considered in the differential diagnoses for pleural space masses and nodules found on CT. PMID:22092656

Reetz, Jennifer A; Buza, Elizabeth L; Krick, Erika L

301

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

PubMed

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

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

2013-07-29

302

Pneumoconiosis: Comparison of imaging and pathologic findings  

SciTech Connect

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.

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

303

Pneumoconiosis: comparison of imaging and pathologic findings  

SciTech Connect

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.

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

304

Practical CT dosimetry.  

PubMed

The dose from computed tomography (CT) examinations is not negligible from a radiation safety standpoint. Occasionally, one encounters a case in which an unsuspected pregnant woman undergoes a CT pelvic scan, and the radiologist is required to estimate the dose to the fetus. This article addresses practical methods of CT dosimetry with a specific discussion on fetal dose estimate. Three methods are described: (1) the use of a dose chart, (2) the pencil ionization chamber method, and (3) the thermoluminescence dosimetry (TLD) method. PMID:2762539

Yoshizumi, T T; Suneja, S K; Teal, J S

305

Transient Mediastinal Enlargement: An Unusual Computed Tomographic Manifestation of Pulmonary Venous Hypertension and Congestive Heart Failure  

Microsoft Academic Search

We describe a case of diffuse superior and middle mediastinal enlargement of soft tissue attenuation noted on helical computed tomography (CT) of a patient with clinical and radiographic findings of congestive heart failure (CHF). Upon treatment and improvement of his pulmonary venous hypertension, a repeat CT scan revealed resolution of the mediastinal abnormalities. We, therefore, advocate a search for primary

Jeffrey A. Miller; Sohail Contractor; Pierre Maldjian; Leo Wolansky

2000-01-01

306

Spontaneous intracranial hypotension presenting as pseudo-subarachnoid hemorrhage on CT scan.  

PubMed

We report a 20-year-old man who suffered from severe headache. A brain CT scan revealed that he had diffuse brain swelling and increased attenuation of the basal cisterns and Sylvian fissure. Subarachnoid hemorrhage (SAH) was diagnosed but the results of CT angiography and conventional arterioangiography were negative. His headache relapsed and remitted several times during the following months. Brain MRI demonstrated brain sagging with a crowded foramen magnum. Spontaneous intracranial hypotension (SIH) was finally diagnosed and his headache subsided after application of an epidural blood patch. Pseudo-SAH on CT scan is an unusual manifestation of SIH that often results in delay of diagnosis and adequate treatment. PMID:21745742

Koh, Elly; Huang, Shih-Hao; Lai, Yen-Jun; Hong, Chien-Tai

2011-07-13

307

Finding Factors  

NSDL National Science Digital Library

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.

2010-01-01

308

CT and angiography of peliosis hepatis  

Microsoft Academic Search

Peliosis hepatis is a rare condition characterized by multiple small blood-filled spaces in the liver parenchyma. This condition is usually found incidentally at autopsy or surgery in patients suffering from various wasting diseases. Although more than 100 cases have been reported, descriptions of the radiologic manifestations are rare. The authors report the computed tomographic (CT) and angiographic findings in a

Yoshiki Tsukamoto; Hajime Nakata; Tatsuya Kimoto; Tetsufumi Noda; Yusuke Kuroda; Joji Haratake

1984-01-01

309

MR and CT of brain's cava.  

PubMed

The Cavum Septi Pellucidi (CSP), Cavum Vergae (CV) and Cavum Veli Interpositi, are anatomical variants located in the midline of the brain. It is important to identify these conditions to distinguish them from other entities that may require treatment. In this paper, our purpose is to describe MR and CT findings of CSP, CV and Cavum Veli Interpositi, explaining the differential diagnosis. PMID:23320830

Saba, Luca; Anzidei, Michele; Raz, Eytan; Suri, Jasjit; Piga, Mario; Grassi, Roberto; Catalano, Carlo

2013-01-15

310

Delayed pneumothorax after CT-guided percutaneous fine needle aspiration lung biopsy  

PubMed Central

Two patients are described who developed pneumothoraces more than 24 hours after computed tomography (CT) guided percutaneous fine needle aspiration lung biopsies. The pneumothoraces required treatment in both cases. Such delayed pneumothorax after lung biopsy is extremely unusual. Patients should be warned of the possible occurrence of this complication and instructed to seek medical help if they develop chest pain or breathlessness. ???

Traill, Z. C.; Gleeson, F. V.

1997-01-01

311

Unusual Cause of Knee Locking  

PubMed Central

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.

Huri, Gazi; Bicer, Omer Sunkar

2013-01-01

312

HOW UNUSUAL IS XRF 060218?  

SciTech Connect

Light curves are calculated for an off-axis observer due to the scattering of primary radiation by extended baryonic material. The unusually long duration and the chromaticity of the light curves above several KeV of XRF 060218 can be explained as a result of the acceleration of the baryonic scattering material by the primary radiation. The observed light curves by our model and detailed fits to the data are presented. The model predicts that {approx} 4 x 10{sup 48} erg are put into accelerated, mildly relativistic baryons by the radiation pressure at large radii from the central engine. It is suggested that the emission below 3 KeV, which lies below the Amati relation, is a baryon contaminated fireball.

Mandal, Samir; Eichler, David [Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel)], E-mail: eichler@bgu.ac.il, E-mail: mandals@bgu.ac.il

2010-04-10

313

Sinonasal teratocarcinosarcoma: an unusual neoplasm.  

PubMed

Sinonasal teratocarcinosarcoma (SNTCS) is a very unusual and aggressive neoplasm characterized by the combination of malignant teratoma and carcinosarcoma features, of which less than forty cases have been reported in the literature. We report on a 75-year-old man with SNTCS that involved the left ethmoid, maxillary and sphenoidal sinuses. The tumor showed a complex histological pattern with mature and immature glands, benign squamous and malignant poorly differentiated epithelia, as well as neuroblastoma-like tissue and sarcoma component with rhabdomyoblastic differentiation. This peculiar blend of tissue types makes the diagnosis of this entity a difficult challenge, especially in small biopsies or in tumors only partially removed. This tumor must be differentiated from several types of carcinomas, esthesioneuroblastoma, craniopharyngioma, malignant mixed tumor of salivary gland type and germ cell tumors. The present case represents, to our knowledge, the third SNTCS described in the european literature. PMID:7567686

Fernández, P L; Cardesa, A; Alós, L; Pinto, J; Traserra, J

1995-03-01

314

[Unusual presentation of giant thymolipoma].  

PubMed

Thymolipoma is a rare thymic tumor; His frequency is estimated at 2 at 9% of all thymic tumors. His diagnosis usually easy, can be difficult with an unusual radio clinic pattern, but actually get benefice from progress in radiologic investigations especially MRI. We reported a case of a 36-year old woman, admitted for a left pleuro-pneumopathy investigation. Evolution, after antibiotic treatment and pleural effusion draining, was well. However, patient developed systolic aortic murmur and a chest-X-ray cardiomegaly supposing cardiologic dysfunction. But the normality of cardiac sonography, the ascension of diaphragma and non-specific thoracic sonographic pattern, guided to thoracic MRI. This exploration demonstrated a giant thymolipoma, which was confirmed by the histologic examination of a resected mass. PMID:12708194

Fenniche, Soraya; Maalej, Sonia; Hassene, Hela; Hantous, Saoussen; Belhabib, Dalenda; Bakkari, Sonia; el Mezni, Faouzi; Horchani, Habiba; Megdiche Mohamed, Lamine

2003-01-01

315

Infantile fibrosarcoma: Magnetic resonance imaging findings in six cases  

Microsoft Academic Search

PurposeTo retrospectively review magnetic resonance (MR) imaging features in a series of six infantile fibrosarcomas to find out if MR can suggest this unusual diagnosis and to highlight the value of MR during and following treatment.

Sandra Canale; Daniel Vanel; Dominique Couanet; Catherine Patte; Caroline Caramella; Clarisse Dromain

2009-01-01

316

Leg CT scan  

MedlinePLUS

... contrast media for radiology, CT, and MRI. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: ... Shaw AS, Dixon AK. Multidetector computed tomography. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: ...

317

Normal Abdominal CT  

NSDL National Science Digital Library

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

Shaffer, Kitt

2007-06-05

318

Normal Chest CT  

NSDL National Science Digital Library

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

Shaffer, Kitt

2010-02-05

319

CT -- Abdomen and Pelvis  

MedlinePLUS

... seconds, and even faster in small children. Such speed is beneficial for all patients but especially children, ... pain is caused by infection and inflammation, the speed, ease and accuracy of a CT examination can ...

320

Scrub Typhus: Radiological and Clinical Findings  

Microsoft Academic Search

OBJECTIVES: To describe the radiological and clinical findings of scrub typhus. We retrospectively analysed the radiographic, thin-section CT and clinical features of scrub typhus.METHODS: The study included 75 consecutive patients (median age=47 years, range=18–81 years) with scrub typhus. Plain chest radiographs were obtained in all 75 patients and 19 underwent thin-section CT within 6 days of initial radiography. The radiographic

Y. H. CHOI; S. J. KIM; J. Y. LEE; H. J. PAI; K. Y. LEE; Y. S. LEE

2000-01-01

321

Thoracic Computed Tomography Findings in Malignant Mesothelioma  

PubMed Central

Background Malignant pleural mesothelioma (MPM) is an uncommon neoplasm. MPM occurs more frequently in patients born or living in certain villages of Turkey. Objectives We aimed to review radiological findings of MPM. Patients and Methods We reviewed the CT findings in 219 biopsy-proven MPM patients admitted to our clinic between 1993 and 2008. Results The most common CT findings included pleural thickening (n=197, 90%) classified as diffuse (n=138, 63%), nodular (n=49, 22%) and mass-type (n=16, 7%). Pleural effusion was found in 173 patients (79%), involvement of the interlobar fissures in 159 (73%), mediastinal pleural involvement in 170 (78%), volume contraction in 142 (65%), mediastinal shift in 102 (47%) and mediastinal lymphadenopathy in 54 (25%). Conclusion MPM may present with diverse radiological features. Pleural thickening and pleural effusion were the most frequent radiological findings. Thoracic CT scans might be assessed more cautiously in patients with environmental exposure to asbestos.

Tamer Dogan, Omer; Salk, Ismail; Tas, Fikret; Epozturk, Kursat; Gumus, Cesur; Akkurt, Ibrahim; Levent Ozsahin, Sefa

2012-01-01

322

An unusual flexor of the fifth finger  

Microsoft Academic Search

An unusual digastric flexor muscle of the 5th finger is described arising from the medial epicondyle of the right humerus and being inserted into the proximal phalanx of the 5th finger. Also observed was the absence of flexor digiti minimi and the unusual smallness of the tendon of flexor digitorum superficialis of this finger.Copyright © 1977 S. Karger AG, Basel

N. D. Carr; J. D. O’Callaghan; R. Vaughan

1977-01-01

323

Unusual Fears in Children with Autism  

ERIC Educational Resources Information Center

|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…

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

2013-01-01

324

Factor Findings  

NSDL National Science Digital Library

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.

Piecora, Jamie

2000-01-01

325

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.

326

Radiographic findings of anastomotic leaks.  

PubMed

Although computed tomography (CT) scans play an important role in the diagnosis and management of anastomotic leaks (AL), there is no consensus on what radiographic findings are associated with AL. The purpose of this study is to identify the most common CT scan findings associated with AL and whether the amount of extraluminal air or the density of extraluminal fluid can be correlated with the presence of an AL. A retrospective chart review of 210 patients with anastomotic leaks from 2003 to 2010 at Mount Sinai Medical Center was performed. Eighty-six patients fit our criteria and were included. All CT scans were reread by an independent radiologist not involved with patient care. Our study included 59 per cent men and 41 per cent women with a mean age of 51 years. Diagnoses included inflammatory bowel disease (53%), malignancy (21%), and diverticulitis (12%). One hundred per cent of the patients had one of three findings: extraluminal air (92%), extraluminal fluid (88%), or extravasation of contrast (32%). Eighty-one per cent (70/86) had both fluid and air simultaneously. Extraluminal air was seen in 79 patients. The estimated amounts of extraluminal air were as follows: 0 to 25 mL (49%), 26 to 500 mL (41%), 500 to 1000 mL (5%), and more than 1000 mL (5%). The Hounsfield unit (HU) measurements of the fluid ranged from 3 to 633 HUs. The most common CT findings associated with AL are pneumoperitoneum and extraluminal fluid, including extravasation of contrast, which can be seen in up to 100 per cent of patients. The amount of estimated extraluminal air and density of fluid collection have no prognostic value in predicting AL. PMID:23336660

Lynn, Elizabeth T; Chen, Julia; Wilck, Eric J; El-Sabrout, Kerri; Lo, Chris C; Divino, Celia M

2013-02-01

327

Unusual scintigraphic appearance of perforation of the common bile duct  

SciTech Connect

This report deals with the diagnosis of perforation of the common bile duct into the lesser sac by HIDA cholescintigraphy. The first hour images after injection were suggestive of biliary obstruction. Subsequent images demonstrated unusual accumulations of the activity into the lesser sac and retroperitoneal potential spaces. Careful correlation between scintigraphic and surgical findings were undertaken. The case is reported to demonstrate the scintigraphic findings in choledochal perforation and to stress the importance of carrying out late images when the initial ones are abnormal.

Acevedo, M.O.; Tauxe, W.N.; Scott, J.W.; Aldrete, J.S.

1983-12-01

328

Congenital primary cerebral angiosarcoma: CT, US, and MR findings  

Microsoft Academic Search

Congenital primary intracranial angiosarcoma (CAS) is an exceptionally rare tumor [1–6]. To our knowledge the imaging features of intracranial angiosarcomas have only been briefly mentioned in the neuropathologic literature [4–6]. To our knowledge, only one case of CAS has been reported [3]. We present a case of a pathologically proven CAS found in a neonate.

I. R. Kirk; R. Dominguez; M. Castillo

1992-01-01

329

Detection of active intraabdominal hemorrhage after blunt trauma: value of delayed CT scanning  

Microsoft Academic Search

Active hemorrhage is a rare finding at CT following blunt abdominal trauma. The time interval between IV contrast administration\\u000a and scanning the abdomen may impact on the ability to visualize active hemorrhage at CT. We report a case of active hemorrhage\\u000a associated with splenic injury that was identified only at delayed CT scanning.

Carlos J. Sivit

2000-01-01

330

Adenoma Malignum Detected on a Trauma CT  

PubMed Central

Adenoma malignum is a rare subtype of cervical adenocarcinoma. Clinical presentation is variable with watery vaginal discharge being the most commonly associated finding. We report a case of adenoma malignum incidentally detected on pelvic computed tomography (CT) performed for a trauma patient. The cervical mass was further characterized by magnetic resonance (MR) imaging and remained compatible with adenoma malignum. Local cervical biopsy was suggestive of the diagnosis which was subsequently confirmed by gross surgical pathology. We briefly discuss adenoma malignum with particular attention to CT and MR imaging features.

McEachern, James; Butcher, Matthew; Burbridge, Brent; Zhu, Yu

2013-01-01

331

UNUSUALLY WIDE BINARIES: ARE THEY WIDE OR UNUSUAL?  

SciTech Connect

We describe an astrometric and spectroscopic campaign to confirm the youth and association of a complete sample of candidate wide companions in Taurus and Upper Sco. Our survey found 15 new binary systems (three in Taurus and 12 in Upper Sco) with separations of 3''-30'' (500-5000 AU) among all of the known members with masses of 2.5-0.012 M {sub sun}. The total sample of 49 wide systems in these two regions conforms to only some expectations from field multiplicity surveys. Higher mass stars have a higher frequency of wide binary companions, and there is a marked paucity of wide binary systems near the substellar regime. However, the separation distribution appears to be log-flat, rather than declining as in the field, and the mass ratio distribution is more biased toward similar-mass companions than the initial mass function or the field G-dwarf distribution. The maximum separation also shows no evidence of a limit at approx<5000 AU until the abrupt cessation of any wide binary formation at system masses of approx0.3 M {sub sun}. We attribute this result to the post-natal dynamical sculpting that occurs for most field systems; our binary systems will escape to the field intact, but most field stars are formed in denser clusters and undergo significant dynamical evolution. In summary, only wide binary systems with total masses approx<0.3 M {sub sun} appear to be 'unusually wide'.

Kraus, Adam L.; Hillenbrand, Lynne A., E-mail: alk@astro.caltech.ed, E-mail: lah@astro.caltech.ed [California Institute of Technology, Department of Astrophysics, MC 105-24, Pasadena, CA 91125 (United States)

2009-10-01

332

Nanoexposure, Unusual Diseases, and New Health and Safety Concerns  

PubMed Central

Accumulating studies in animals have shown that nanoparticles could cause unusual rapid lung injury and extrapulmonary toxicity. Whether exposure of workers to nanoparticles may result in some unexpected damage as seen in animals is still a big concern. We previously reported findings regarding a group of patients exposed to nanoparticles and presenting with an unusual disease. The reported disease was characterized by bilateral chest fluid, pulmonary fibrosis, pleural granuloma, and multiorgan damage and was highly associated with the nanoparticle exposure. To strengthen this association, further information on exposure and the disease was collected and discussed. Our studies show that some kinds of nanomaterials, such as silica nanoparticles and nanosilicates, may be very toxic and even fatal to occupational workers exposed to them without any effective personal protective equipment. More research and collaborative efforts on nanosafety are required in order to prevent and minimize the potential hazards of nanomaterials to humans and the environment.

Song, Yuguo; Tang, Shichuan

2011-01-01

333

Establishing Thresholds for Unusually Large Binge Eating Episodes  

PubMed Central

Objective This study examined group differences in ratings of amounts of food at the threshold of what is considered “unusually large” to develop empirically derived definitions of binge eating criteria for bulimia nervosa and binge eating disorder. Method Groups included undergraduate students, community members, and participants from an eating disorder (ED) longitudinal study. Data were collected via self-report questionnaires. Results Ordinal logistic regression indicated that males reported a higher threshold for amounts of food compared to females. Overweight participants from the student and ED samples, but not from the community sample, reported higher thresholds. The presence of binge eating and fear of weight gain were also associated with higher thresholds. Discussion These findings provide evidence that gender, social context, BMI, and eating disorder status are important considerations in determining what is an unusually large amount of food. Future diagnostic guidelines should consider the importance of these factors when defining binge eating.

Arikian, Aimee; Peterson, Carol B.; Swanson, Sonja A.; Berg, Kelly C.; Chartier, Lisa; Durkin, Nora; Crow, Scott J.

2013-01-01

334

Finding food  

PubMed Central

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.

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

2011-01-01

335

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

Microsoft Academic Search

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,

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

2003-01-01

336

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

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.

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

1995-12-10

337

Use of CT in the evaluation of cochlear otosclerosis  

SciTech Connect

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.

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

1985-09-01

338

PET CT: Evolving role in hadron therapy  

NASA Astrophysics Data System (ADS)

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.

Levy, Richard P.

2007-08-01

339

CT features of intrathoracic gossypiboma (textiloma).  

PubMed

Here, we present chest radiography and computed tomography (CT) findings for three cases of mediastinal and pleural gossypiboma. Radiological manifestations varied according to the locations and chronicities of the gauze sponges and the types of reactions that they caused. CT analysis readily diagnosed gossypibomas in the early postoperative period by showing well-defined mediastinal- or pleural-based masses with hyperdense rims and central air bubbles. However, one patient presented in the late postoperative period, and a CT scan revealed a well-defined, solid pleural mass that was devoid of air bubbles; a correct diagnosis could not be established and the patient had to be reoperated on. Radiologists should be aware of different manifestations of this rare condition in cases of prior thoracic surgery and persistent respiratory symptoms. PMID:20677129

Karabulut, Nevzat; Herek, Duygu; Kiro?lu, Yilmaz

2010-06-30

340

CT colonscopy: experience of 100 cases using volumetric rendering  

NASA Astrophysics Data System (ADS)

Objective: To evaluate the efficacy of Ct colonoscopy for polyp detection using volumetric rendering and comparison to actual colonoscopy. Materials and Methods: 100 patients had CT colonoscopy performed by the same blinded experienced radiologist just prior to their actual colonoscopy. The number of polyps found by both techniques was compared as a function of their pathologically measured size. Complications of both procedures were assessed and ancillary findings found on noncontrast CT were also evaluated for significance. Results: 61 polyps were found by colonoscopy and resected, including 23 which were hyperplastic polyps, 35 tubular adenomas, and 3 villous adenomas. 34 were < 5 mm, 18 5 - 9 mm, and 9 were >= 10 mm in diameter. The sensitivity of CT colonoscopy for < 5 mm polyps was 11.8%, for 5 - 9 mm polyps, 61.1%, and for >= 10 mm, 100%, including the 3 villous adenomas. Evaluating by patient, of the 19 patients who one or more >= 5 mm polyps found by colonoscopy, 17 had polyps identified by CT colonoscopy. The remaining 2 patients with a normal CT colonoscopy had polyps 5 - 9 mm in size. There were no significant complications from CT colonoscopy, but 3 serious complications from actual colonoscopy. CT colonoscopy discovered significant noncolonic pathology in 10 patients. Conclusion: CT colonoscopy performed with volumetric rendering has moderate sensitivity for detecting polyps 5 - 9 mm in size and is highly sensitive for clinically significant polyps >= 10 mm in size.

Hopper, Kenneth D.; Khandelwal, Mukul; Thompson, Christopher

2001-05-01

341

Unusual primary osseous Hodgkin lymphoma in rib with associated soft tissue mass: a case report and review of literature  

PubMed Central

Hodgkin lymphoma (HL) typically presents as nodal lesion and may involve extranodal sites during the progression of the disease. Primary osseous HL without any lymph node association is extremely rare and only a few such cases have been described in the literature. We present a case of unusual primary HL in rib occurring in a middle-aged female patient. Computed tomography (CT) scan revealed an osteolytic lesion was located at the right second rib and was associated with a large soft tissue mass. There was no regional lymph node involvement. CT scan of neck and abdomen was performed and showed no pathologic findings, particularly no lymphadenopathy and organomegaly could be observed. Histologically, typical binucleated Reed-Sternberg (RS) cells and lacunar cells were scattered in the background of reactive inflammation with infiltration of lymphocytes, histiocytes and eosinophilic granulocytes. By immunohistochemistry, RS cells and lacunar cells were positive for CD15 and CD30 with typical membrane and paranuclear dot-like staining pattern. However, these cells were negative for Epstein-Barr virus detection by in situ hybridization. A diagnosis of primary osseous HL was made. The patient received systemic chemotherapy and local radiotherapy, and was on regular follow-up for 24?months. There was no sign of recurrence of tumor and lymph node or bone marrow involvement. Because there is a possibility of secondary bone involvement by systemic HL, strict histological analysis and thorough radiographic examination are suggested to be necessary for accurately diagnosing this tumor when it presents as a solitary bone lesion. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2846916171507084

2012-01-01

342

Infected complex odontoma: an unusual presentation.  

PubMed

Odontomas represent a hamartomatous malformation. They are usually asymptomatic and are diagnosed on routine radiological examination .The eruption and infection of odontoma are uncommon. Till now, only 20 cases of erupted odontoma are reported in the literature. We report an unusual case of infected complex odontoma with eruption of odontoma in the oral cavity and perforation of the cheeks with a tooth impacted upon which makes the presentation unusual that has not been reported earlier. The dentist should be familiar with common and unusual appearance of odontoma for proper diagnosis and management. PMID:22922919

Agrawal, Bhavana; Gharote, Harshkant; Nair, Preeti; Shrivastav, Saurabh

2012-08-24

343

Methanol poisoning: characteristic MRI findings.  

PubMed

Acute methanol intoxication is not an unusual poisoning. It can have serious neurological sequelae. We emphasize how neuroimaging can help in distinguishing methanol poisoning from other causes of acute unconsciousness in alcoholic patients such as hypoglycemic brain damage and carbon monoxide poisoning or head injury, which are frequently observed in alcoholic patients and are also responsible for altered sensorium. The most important findings in MR brain imaging in methanol poisoning have been bilateral putaminal hemorrhagic necrosis. Other less common findings are subcortical and deep white matter lesions, cerebral and cerebellar cortical lesions, and midbrain lesions, cerebral and intraventricular hemorrhage, and even enhancement of necrotic lesions, we found almost the entire spectrum of MRI findings in this patient with methanol poisoning. Neurological sequelae can entail the course and prognosis in methanol poisoning. The patient died because of ventilator-associated pneumonia that developed in the course of prolonged hospitalization. PMID:22634487

Jain, Nirdesh; Himanshu, Dandu; Verma, Shailendra Prasad; Parihar, Anit

344

Rheological Characterization of Unusual DWPF Slurry Samples (U)  

SciTech Connect

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.

Koopman, D. C.

2005-09-01

345

FaCT and iFaCT  

Microsoft Academic Search

FaCT (Fast Classification of Terminologies) is a De- scription Logic (DL) classifier which has been imple- mented as a test-bed for a sound and complete tableaux satisfiability\\/subsumption testing algorithm. FaCT's novelty lies in its relatively expressive logic and its highly optimised implementation of the tableaux algorithm. iFaCT is an extension of FaCT that supports reason- ing with inverse roles. The

Ian Horrocks

1999-01-01

346

Deep venous thrombosis and pulmonary embolism detected by FDG PET/CT in a patient with bacteremia.  

PubMed

We report incidental FDG PET/CT findings of deep venous thrombosis and pulmonary embolism in a patient with bacteremia. In this patient, diagnosis of thromboembolism was not considered until FDG PET/CT imaging was performed, and the findings prompted immediate anticoagulant therapy. The role of FDG PET/CT in venous thromboembolism is not yet well established, but the potential benefit must be kept in mind when interpreting FDG PET/CT images regardless of the underlying disease. PMID:23429400

Nielsen, Anne Lerberg; Thomassen, Anders; Hess, Sřren; Alavi, Abass; Hřilund-Carlsen, Poul Flemming

2013-04-01

347

Arachnodactyly and unusual dermatoglyphics: study of a case.  

PubMed

Clinical and dermatoglyphic findings are reported on a 3-yr old girl with multiple congenital anomalies and unusual dermatoglyphics. The anomalies, including contractural arachnodactyly, rhizomelia (a relative shortening of the proximal segment of the limbs), skin dimples, clinodactyly, disharmonic hand bone maturation, absent, hypoplastic and unusually positioned digital and metacarpophalangeal flexion creases, are not indicative of Marfan syndrome, but it is unclear what this syndrome constitutes. Among the child's most striking dermatoglyphic features, the fingertip patterns (mostly large whorls with extralimital triradii) extend proximally to the middle phalanx and are associated with unusually placed triradii. The furrows between the epidermal ridges are narrower on the volar aspects of the middle and distal phalanges than on the proximal phalanges and palms, resulting in a higher ridge density in the former areas. Dermatoglyphic comparisons between the proposita and her parents are provided. These dermatoglyphic aberrations may indicate the presence of a deleterious agent active during the period of the development of the ridge configurations and of the digital flexion creases. PMID:3223499

Krush, A J; Schaumann, B A; Youssoufian, H

1988-09-01

348

Unusual formation of thiaisoporphyrins from 21-thiaporphyrins.  

PubMed

We report the unusual formation of thiaisoporphyrins containing bridging sp(3)meso carbon between two pyrroles when 21-thiaporphyrins were reacted with PhBCl2 in dry toluene at reflux temperature. PMID:23949209

Ghosh, Avijit; Lee, Way-Zen; Ravikanth, Mangalampalli

2013-10-01

349

An Unusual Case of Keratosis Follicularis.  

National Technical Information Service (NTIS)

A case of KF was studied to ascertain the cause of an unusual pigmentary disturbance. In the active lesion of KF, clinical hyperpigmentation was explained by prolonged retention, in the thickened horny layer, of pigment granules. Abnormal melanocyte struc...

A. N. Cattano

1968-01-01

350

An Unusual Cause of Subarachnoid Hemorrhage  

PubMed Central

A 47-year-old man presented to our hospital with collapse secondary to a subarachnoid hemorrhage. A careful history taking revealed symptoms of anaphylaxis before his collapse. This case illustrates an unusual cause of subarachnoid hemorrhage.

2008-01-01

351

An unusual cause of toe necrosis  

PubMed Central

Peripheral vascular disease is a rare feature of pheochromocytoma. This potentially catastrophic but curable tumor should be suspected in combination of distal necrosis with hypertension and palpable pulses. We report such an unusual case of pheochromocytoma presenting as toe necrosis.

Bandawar, Mayur S.; Ansari, Mohammad S.; Behera, Arunanshu; Bhadada, Sanjay K.

2013-01-01

352

Unusual Southern Hemisphere Stratosphere Winter of 2002.  

National Technical Information Service (NTIS)

The southern hemisphere stratospheric winter of 2002 was the most unusual winter yet observed in the southern hemisphere climate record. Temperatures near the edge of the Antarctic polar vortex were considerably warmer than normal over the entire course o...

P. A. Newman E. R. Nash

2003-01-01

353

An unusual case of primary arteriocolic fistula.  

PubMed

A case is presented of lower digestive bleeding, caused by a fistula between a right iliac artery aneurysm and the sigmoid colon. Particular aspects of this unusual fistula are discussed from a diagnostic and therapeutic point of view. PMID:6972291

Smeesters, C J; Quenneville, G; Brossoit, R; Hurtubise, M; Giroux, L M; Ayroud, Y; Daloze, P M

354

[Primary bronchial plasmacytoma: computed tomography findings].  

PubMed

Extramedullary plasmacytomas are malignant neoplasms of the plasmatic cells of the soft tissues. Primary pulmonary plasmacytoma is the rarest type of extramedullary plasmacytoma. The radiologic findings are unspecific and the diagnosis is histologic. Chest CT is useful for confirming its location and planning surgery. We present a case of primary endobronchial plasmacytoma in an adult diagnosed at histology. We describe the findings at plain-film chest X-ray and at CT, and we analyze the usefulness of 3D reconstructions for planning surgery. PMID:19523660

Gulías, D; Fernández-Daponte, C; Pombo, J; Martínez-Sapińa, M J

2009-06-11

355

Dose management in CT facility  

PubMed Central

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 level required for confident diagnosis. This inevitably results in patient radiation doses that are higher than actually required, as also stressed by the US Food and Drug Administration (FDA) regarding the CT exposure of paediatric and small adult patients. However, the wide range in exposure parameters reported, as well as the different CT applications reveal the difficulty in standardising CT procedures. The purpose of this paper is to review the basic CT principles, outline the recent technological advances and their impact in patient radiation dose and finally suggest methods of radiation dose optimisation.

Tsapaki, V; Rehani, M

2007-01-01

356

Primary intracerebral malignant fibrous histiocytoma: CT, MRI, and PET-CT findings.  

PubMed

Primary intracranial malignant fibrous histiocytoma (MFH) is an extremely rare entity. A few reported cases have been associated with factors such as a previous history of radiation therapy or surgical trauma. We report on a rare case of intracerebral MFH in a previously healthy 47-year-old man, which was initially presumed to be a high-grade glioma. Conventional as well as advanced magnetic resonance sequences, including diffusion-weighted image and perfusion-weighted image, were used in characterization of the mass. PMID:21447025

Yoo, Roh-Eul; Choi, Seung Hong; Park, Sung-Hye; Jung, Hee-Won; Kim, Ji-hoon; Sohn, Chul-Ho; Chang, Kee-Hyun

2011-03-29

357

Dedicated breast CT  

NASA Astrophysics Data System (ADS)

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.

Boone, John

2009-03-01

358

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

SciTech Connect

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.

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

359

Postoperative Pneumoperitoneum: An Unusual Etiology  

PubMed Central

Although postoperative pneumoperitoneum is a common finding, it is particularly disturbing when there is an increase in the amount of postoperative pneumoperitoneum or when the radiographic finding of pneumoperitoneum is accompanied by such physical findings as increased abdominal tenderness, peritoneal signs or paralytic ileus. Four patients operated upon at the Mount Sinai Hospital are presented. All patients underwent abdominal surgery for treatment of some form of inflammatory bowel disease and all were receiving systemic corticosteroids in the postoperative period. Abdominal findings of tenderness, ileus and peritoneal irritation developed shortly after the removal of Penrose drains in the postoperative period. Pneumoperitoneum was confirmed by abdominal roentgenographs. The first patient in this group underwent a laparotomy with essentially negative findings other than a freely open drain tract. The subsequent three patients were managed by close observation and frequent abdominal radiographs. These three patients had contrast roentgenographic studies of the upper gastrointestinal tract to rule out perforation of a peptic ulcer, and in the patient upon whom reservoir ileostomy had been performed, a contrast study of the reservoir was performed. All patients recovered fully with this management and there were no sequelae. The mechanism for the appearance of pneumoperitoneum after removal of drains, particularly when the patient is receiving systemic corticosteroids, is discussed. Emphasis is placed on the need to consider and rule out perforation of a hollow viscus in this situation before accepting drain removal as the sole cause of post-operative pneumoperitoneum. ImagesFig. 1.Fig. 2.Fig. 3.

Tenembaum, Moises; Bauer, Joel J.; Gelernt, Irwin M.; Kreel, Isadore; Aufses, Arthur H.

1978-01-01

360

Imaging findings of Pott's disease.  

PubMed

Tuberculosis (TB) continues to be an important public health problem in developed countries especially in deprived socioeconomic groups, older people, immunocompromised patients, drug-therapy resistant cases and the immigrant population. The spine is the most frequent location of musculoskeletal TB. The wide range of clinical presentations results in difficulties and delays in diagnosis. Advanced disease mimics other infections and malignancy. The diagnosis of spinal infections relies on three main factors: clinical symptoms, imaging and bacteriological culture. Advanced imaging such as Magnetic Resonance Imaging (MRI), Multidetector Computed Tomography (MDCT) and Fluor18-Deoxiglucose Positron Emission Tomography combined with CT (F-18 FDG PET-CT) demonstrate lesion extent, serve as guide for biopsy with aspiration for culture, assist surgery planning and contribute to follow-up. Diagnosis of TB cannot be established solely on the basis of clinical tests or imaging findings and biopsy may be required. Differential diagnosis between tuberculous and pyogenic spondylitis is of clinical importance, but may be difficult on the basis of radiological findings alone. Findings not pathognomonic but favoring tuberculous etiology include: slow progression of lesions with late preservation of disk space, involvement of several contiguous segments, large intraosseous and paraspinal abscesses containing calcifications, and body collapse with kyphotic deformity. In this essay the highlights of TB imaging are reviewed through published literature. In addition, we review retrospectively the radiological findings of 48 patients with tuberculous spondylitis treated from 1993 to 2010. There were 23 male and 25 female patients with a mean age of 53 years. PMID:22684257

Rivas-Garcia, Antonio; Sarria-Estrada, Silvana; Torrents-Odin, Carme; Casas-Gomila, Lourdes; Franquet, Elisa

2012-06-09

361

CT of Blunt Chest Trauma  

Microsoft Academic Search

Although CT is the examination of choice in trauma of the head and abdomen, its role in the evaluation of blunt chest trauma is still evolving. We compared anteroposterior supine chest radiographs with chest and abdominal CT scans ob- tained over a 2-year period in victims of major trauma. CT proved useful in diagnosing unsuspected chest injuries, show- ing their

Scott R. Kerns; Spencer B. Gay

362

CT of submandibular gland sialolithiasis  

Microsoft Academic Search

We emphasise the importance of high-resolution CT with reconstruction in the demonstration of submandibular gland (SMG) sialolithiasis and its role in monitoring treatment. We studied 76 patients with swollen and tender SMG, some with fever. They underwent conventional radiography, sonography (US) and high-resolution CT with reconstructions. Conventional radiographs demonstrated single stones in 29 patients. Axial CT, before reconstructions, demonstrated single

E. Avrahami; M. Englender; E. Chen; D. Shabtay; R. Katz; M. Harell

1996-01-01

363

State-of-the-Art CT Imaging Techniques for Congenital Heart Disease  

PubMed Central

CT is increasingly being used for evaluating the cardiovascular structures and airways in the patients with congenital heart disease. Multi-slice CT has traditionally been used for the evaluation of the extracardiac vascular and airway abnormalities because of its inherent high spatial resolution and excellent air-tissue contrast. Recent developments in CT technology primarily by reducing the cardiac motion and the radiation dose usage in congenital heart disease evaluation have helped expand the indications for CT usage. Tracheobronchomalacia associated with congenital heart disease can be evaluated with cine CT. Intravenous contrast injection should be tailored to unequivocally demonstrate cardiovascular abnormalities. Knowledge of the state-of-the-art CT imaging techniques that are used for evaluating congenital heart disease is helpful not only for planning and performing CT examinations, but also for interpreting and presenting the CT image findings that consequently guide the proper medical and surgical management.

2010-01-01

364

An unusual presentation of latent autoimmune diabetes in adults.  

PubMed

Latent Autoimmune Diabetes in Adults (LADA) is an autoimmune form of type 1 diabetes mellitus presenting in adulthood. It is often confused with other types of diabetes and therefore the management is frequently inadequate. Acute hyperglycemic crisis in the form of diabetic ketoacidosis (DKA) or hyperglycemic hyperosmolar state (HHS) are unusual findings. We report a clinical case of a 66-year-old female who presented for the first time with DKA and was subsequently diagnosed as a case of LADA. Presumptive diagnosis of LADA was confirmed with the presence of autoantibody to glutamic acid decarboxylase 65 (Anti-GAD65 antibody). PMID:22582562

Ray, S; Sarkar, D; Ganguly, S; Maiti, A

2012-02-01

365

THE UNUSUAL RR LYRAE POPULATION OF NGC 6101  

SciTech Connect

We use V-band time-series data to analyze the RR Lyrae (RRL) population of the Galactic globular cluster NGC 6101. Using template fitting, we have discovered seven new RRL stars and confirmed 10 candidates. We find unusually long mean periods for the RRL of (P{sub ab} ) = 0.803 days and (P{sub c} ) = 0.393 days, and an atypically high ratio of n(c)/n(ab + c) = 0.82. Based on our derived mean properties of the RRL, NGC 6101 is Oosterhoff type II, consistent with the cluster metallicity but intriguing with respect to its kinematics.

Cohen, Roger E.; Sarajedini, Ata [Department of Astronomy, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32611 (United States); Kinemuchi, Karen; Leiton, Roger [Departamento de AstronomIa, Universidad de Concepcion Casilla 160-C, Concepcion (Chile)

2011-01-20

366

An unusual suicide case by combination of choking and hanging.  

PubMed

A 40-year-old man was found dead in his prison cell, hanging on a twisted bandage tightened around his neck. His permanent metal tracheostomy tube was completely corked with a piece of paper wrapped with transparent cellophane from a cigarette case. After police investigation and complete autopsy, suicide was determined as the manner of death. Although suicides by 1 form of asphyxia are relatively common, combination of several different forms of asphyxia is far less frequent. We present this unusual and very rare case of suicide by combination of 2 forms of asphyxia, that is, choking and hanging, along with autopsy findings and discussion. PMID:21897191

Vapa, Dusan; Radosavkic, Radosav; Maletin, Miljen; Veselinovic, Igor

2012-12-01

367

[Death in a rainwater tank--unusual death by hypothermia].  

PubMed

Death due to hypothermia is often accidental and associated with alcohol intoxication, diseases or previous trauma. A very rare phenomenon is suicidal hypothermia. A 74-year-old depressive woman was found dead in a rain barrel with her head above the water level in February at an outdoor temperature of 0 degrees C. Forensic autopsy did not reveal any findings typical of drowning. Likewise, there was no morphological evidence of hypothermia, but this cannot be expected in immersion hypothermia with a very short agony. Unusual situations at scene always require comprehensive police investigations and medicolegal examinations. PMID:23596895

Doberentz, Elke; Madea, Burkhard

368

Disseminated pneumocephalus secondary to an unusual facial trauma.  

PubMed

Pneumocephalus can be secondary to a postintrathecal procedure, sinus fracture, basilar skull fracture, congenital skull defect, neoplasm, gas producing organism, barotrauma, neurosurgery, paranasal sinus surgery, mask or nasal continuous positive-airway pressure. Unusual facial traumas can also be rare causes of pneumocephalus. Here, we present such a case in whom an air compressor tip injury to both eyes led to the disseminated pneumocephalus. We report this rare case with the computed tomography findings and try to explain the possible mechanism of the pnemocephalus. PMID:12039023

Yildiz, Altan; Duce, Meltem Nass; Ozer, Caner; Apaydin, F Demir; E?ilmez, Hulusi; Kara, Engin

2002-04-01

369

Unusual histological presentation in neurofibromas: Two case reports  

PubMed Central

Various histological variants of neurofibroma have been described. The objective of this paper is to discuss the unusual histological findings seen in two cases of neurofibromas associated with neurofibromatosis type 1 Both cases presented with multiple subcutaneous nodules. Surgical excision of the largest nodule was done in both the cases. Histological examination of case no.1 revealed a benign tumor of the peripheral nerve sheath, of neurofibroma type with presence of mucus producing glands. The epithelial component was benign in this case. The second case showed presence of rosettes in between areas of typical neurofibroma.

Joshi, Deepti; Gangane, Nitin; Kishore, Sanjeev; Vagha, Sunita

2008-01-01

370

Unusual acquired gastric outlet obstruction during infancy: a case report  

PubMed Central

Acquired gastric outlet obstruction (GOO) during infancy beyond the neonatal period is a very rare condition when other congenital causes like infantile hypertrophic pyloric stenosis, antral diaphragm, pyloric atresia etc are excluded. We report an unusual case of 6 month old male child who presented with recurrent episode of vomiting not relieved by medication. On gastrograffin study there was pre pyloric stricture of unknown etiology and was managed by stricturoplasty. We are reporting this case because of its rarity and with excellent outcome if diagnosed and managed properly. Even on extensive search of English literature we are not able to find a single report of this lesion in infants.

Srivastava, PK; Gangopadhyay, AN; Upadhyaya, VD; Sharma, SP; Jaiman, R; Kumar, V

2008-01-01

371

Unusual fractures associated with osteoporosis in premenopausal women.  

PubMed Central

Two premenopausal women (aged 40 and 34 years) and multiple undisplaced, often asymptomatic fractures of the femurs, ribs, metatarsals and other bones. The fractures, which appeared on roentgenograms as transverse radiolucent zones with variable callus formation, healed slowly or not at all despite treatment with calcium and vitamin D. They resembled pseudofractures (Looser's transformation zones) radiologically, but the biochemical and histologic findings were those of idiopathic osteoporosis rather than osteomalacia. Since neither patient had been subjected to unusual stress it was concluded that the fractures had resulted from normal activity in abnormal bone. Images FIG. 1 FIG. 2 FIG. 3 FIG. 4

Richardson, R. M.; Rapoport, A.; Oreopoulos, D. G.; Meema, H. E.; Rabinovich, S.

1978-01-01

372

[Usefulness of CT angiography for demonstrating cerebral aneurysms].  

PubMed

We report the usefulness of computed cerebral angiotomography (CT angiography) for demonstrating cerebral aneurysm and the clinical significance of CT angiography for ruptured cerebral aneurysm. Our modified method of CT angiography was easy and less time-consuming. Fifteen seconds after starting a single bolus injection, 1 ml/kg/25 seconds via cubital vein, of contrast medium (60% urograffin), 5 serial 5 mm thick-CT slices were scanned in every 6.5 seconds including 2 seconds of interval, beginning from an axial level 20 mm above the orbitomeatal line and ending at a level 40 mm. A total of 103 patients were examined in this report, consisting of 70 unruptured asymptomatic, 8 unruptured symptomatic (oculomotor nerve palsy) and 25 subarachnoid hemorrhage (SAH). Seven unruptured aneurysms in 4 asymptomatic cases, 2 unruptured aneurysms in 2 symptomatic cases 27 aneurysms in 24 SAH cases were suspected by CT angiography. Of these 36 aneurysms suspected by CT angiography 32 aneurysms were confirmed by cerebral angiography. The detection rate of CT angiography in this report was 89%, higher than those of previous reports. Thirteen aneurysms were located at internal carotid-posterior communicating artery (ICPC) junction. 11 at anterior communicating artery (Acom), 7 at middle cerebral artery (MCA). CT angiography showed a false positive findings in 4 cases, which were all located at Acom. Four aneurysms were not detected in CT angiography, which were all located at MCA and were very small (2-3 mm) in diameter. There were no deteriorated cases during and after CT angiography. We suggest that CT angiography is a useful and safe method for predicting the location of not only unruptured but ruptured aneurysms. PMID:3374742

Okuno, T; Moriwaki, H; Miyamoto, K; Terada, T; Nishiguchi, T; Itakura, T; Hayashi, S; Komai, N

1988-03-01

373

CT and MRI of fibrous dysplasia of the spine  

PubMed Central

Objectives The purpose of this study was to present the CT and MRI findings of patients with fibrous dysplasia (FD) of the spine. Methods Among the patients with pathologically proven skeletal FD, 12 (8 males and 4 females; mean age, 43 years) who were evaluated with either spine CT or MRI were included. The number and location of the involved vertebral segments, the presence of lytic lesions, ground-glass opacity (GGO), an expansile nature, cortical disruption, a sclerotic rim, a decrease in body height and contour deformity were examined on CT scans (n = 12), while signal intensity, enhancement patterns and the presence of a dark signal rim on the lesion were examined using MRI (n = 9). Results Nine patients had polyostotic FD, including one with an isolated spinal localisation, while three had monostotic FD. An expansile nature (n = 3) and osteolytic lesions with GGO (n = 3) were seen. On CT images, GGO was noted in all patients. An expansile nature (n = 11) and presence of lytic lesions (n = 11) were noted. A decrease in body height (n = 9) and sclerotic rim formation (n = 9) were indicated. Contour deformities were visible in six patients. The MRI findings were non-specific. Dark signal rims were visible on MRI in seven patients. Conclusion Typical imaging findings of extraspinal FD were noted on spine CT scans. These characteristic CT imaging findings of spinal FD may be helpful in differentiating FD from other common spine diseases.

Park, S K; Lee, I S; Choi, J-Y; Cho, K H; Suh, K J; Lee, J W; Song, J W

2012-01-01

374

Unusual presentation of pericardial effusion  

PubMed Central

Cough syncope is classically described in patients with chronic obstructive pulmonary disease, and it is quite rare to find a treatable condition for the same. However, it is extremely rare to have cough syncope due to pericardial effusion. We present a case of pericardial effusion who presented to the intensive care with cough syncope.

Saseedharan, Sanjith; Kulkarni, Suyash; Pandit, Rahul; Karnad, Dilip

2012-01-01

375

Unusual articular abnormalities in scleroderma  

Microsoft Academic Search

Summary Articular involvement is described in a 58-year-old female patient with scleroderma. Radiological findings included intra-articular calcification, destructive osteoarthritis and selective involvement of the first metacarpal base. The discussion attempts to explain the way in which intra-articular calcification and osteolytic lesions may appear, citing various hypotheses put forward concerning such involvement in scleroderma.

J. Albert; H. Ott

1984-01-01

376

An Unusual Cause of a Pain in the Neck: Pseudoaneurysm from Tuberculous Lymphadenitis  

PubMed Central

A pseudoaneurysm is a haematoma which is surrounded by connective tissue and communicates with the lumen of a ruptured blood vessel. It has no true defined capsule. We describe a case of tuberculous pseudoaneurysm. This is a rare complication of tuberculosis. The clinical presentation of these lesions is highly variable. Definitive diagnosis should consist of contrast-enhanced CT and arteriography. Treatment should include repair of the arterial wall by surgery, endovascular stent-graft insertion, or embolization followed by a full course of antituberculous chemotherapy. Our case is highly unusual in that the pseudoaneurysm arose from the subclavian vasculature in a patient with extrapulmonary tuberculosis only.

Kennedy, B.; Curran, D. R.; Brady, A.; O'Connor, T. M.

2012-01-01

377

[Epilepsy with normal CT: the MR contribution].  

PubMed

We present a study of 165 patients with fits with normal brain computerized tomography (CT) scan or else who showed no evidence as to the etiology of such attacks. We analyzed the magnetic resonance (MR) results obtained. In 36.6% of cases MR was pathological, the most frequent finding in our series being cerebral atrophy (12.8%). We comment on the most important pathology groups, highlighting the contribution MR made in our patients. PMID:8556617

Garcia Asensio, S; Guelbenzu, S; Barrena, R; López del Val, J; Mazas, L; Macho, J

378

CT and angiography of peliosis hepatis  

SciTech Connect

Peliosis hepatis is a rare condition characterized by multiple small blood-filled spaces in the liver parenchyma. This condition is usually found incidentally at autopsy or surgery in patients suffering from various wasting diseases. Although more than 100 cases have been reported, descriptions of the radiologic manifestations are rare. The authors report the computed tomographic (CT) and angiographic findings in a case of peliosis hepatis.

Tsukamoto, Y.; Nakata, H.; Kimoto, T.; Noda, T.; Kuroda, Y.; Haratake, J.

1984-03-01

379

Blunt traumatic abdominal aortic rupture: CT imaging  

Microsoft Academic Search

Blunt abdominal aortic trauma is a rare but potentially lethal event. It is commonly associated with high-speed motor vehicle\\u000a accidents. Intimal flap, thrombosis, and pseudoaneurysm of the abdominal aorta are the more common findings. We present a\\u000a case of blunt abdominal aortic trauma in which CT disclosed free aortic rupture with intraabdominal bleeding and a huge retroperitoneal\\u000a hematoma, an extremely

Gaetano Nucifora; Fjoralba Hysko; Annarosa Vasciaveo

2008-01-01

380

CT imaging in motorcycle collision victims: routine or selective?  

PubMed

With improving accuracy and efficiency of CT, some trauma centers have used a low threshold for the use of CT scans in the evaluation and assessment of trauma patients. The purpose of this study was to evaluate the diagnostic benefits of liberal CT scanning in multisystem blunt trauma motorcycle accident victims. The trauma registry at our community-based Level II center was accessed to identify consecutive motorcycle accident victims within a 55-month period who: 1) were evaluated on presentation by an attending trauma surgeon; and 2) underwent a head, cervical spine, chest, abdomen, or pelvis CT scan or any combination as part of their initial assessment. For those patients with clinically significant findings identified on CT, the percentage of those with negative clinical examinations was calculated. We found that 48, 77, 47, and 69 per cent of patients with clinically significant findings on head, cervical spine, thoracic, and abdominal CT, respectively, had normal clinical examinations. Our data suggest lower thresholds for CT use in the evaluation of patients sustaining multisystem blunt trauma should be adopted, even in the face of normal clinical examinations. This is especially true for the neck and abdominal regions. PMID:19886129

Compoginis, John M; Akopian, Gabriel

2009-10-01

381

Cochlear otosclerosis (otospongiosis): CT analysis with audiometric correlation  

SciTech Connect

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.

Swartz, J.D.; Mandell, D.W.; Berman, S.E.; Wolfson, R.J.; Marlowe, F.I.; Popky, G.L.

1985-04-01

382

CT number definition  

NASA Astrophysics Data System (ADS)

The accuracy of CT number plots has been found lacking in several medical applications. This is of concern since the ability to compare and evaluate results on a reproducible and standard basis is essential to long term development. Apart from the technical limitations arising from the CT scanner and the data treatment, there are fundamental issues with the definition of the Hounsfield number, namely the absence of a standard photon energy and the need to specify the attenuation mechanism for standard measurements. This paper presents calculations to demonstrate the shortcomings of the present definition with a brief discussion. The remedy is straightforward, but probably of long duration as it would require an international agreement.

Bryant, J. A.; Drage, N. A.; Richmond, S.

2012-04-01

383

Multidetector CT: Detection of Active Hemorrhage in Patients with Blunt Abdominal Trauma  

Microsoft Academic Search

OBJECTIVE. The aim of this study was to determine the imaging findings and the preva- lence of active hemorrhage on contrast-enhanced multidetector CT in patients with blunt ab- dominal trauma. MATERIALS AND METHODS. Contrast-enhanced multidetector CT images of 165 patients with blunt abdominal trauma were reviewed for the presence of extravasated contrast agent, a finding that represents active hemorrhage. The

Jürgen K. Willmann; Justus E. Roos; Andreas Platz; Thomas Pfammatter; Paul R. Hilfiker; Borut Marincek; Dominik Weishaupt

384

Incidentally detected grade 3 cystocele on FDG PET/CT in a case of suspected malignancy  

PubMed Central

Unexpected findings are seen on FDG PET/CT outside the primary site of abnormality. Such incidental findings are common in the genitourinary tract due to normal urinary excretion of FDG. We report a case of incidentally detected grade 3 cystocele in a patient who underwent FDG PET/CT study for a suspected lung malignancy.

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

2012-01-01

385

Quantitative micro-CT  

NASA Astrophysics Data System (ADS)

Micro-CT for bone structural analysis has progressed from an in-vitro laboratory technique to devices for in-vivo assessment of small animals and the peripheral human skeleton. Currently, topological parameters of bone architecture are the primary goals of analysis. Additional measurement of the density or degree of mineralization (DMB) of trabecular and cortical bone at the microscopic level is desirable to study effects of disease and treatment progress. This information is not commonly extracted because of the challenges of accurate measurement and calibration at the tissue level. To assess the accuracy of micro-CT DMB measurements in a realistic but controlled situation, we prepared bone-mimicking watery solutions at concentrations of 100 to 600 mg/cm3 K2PO4H and scanned them with micro-CT, both in glass vials and microcapillary tubes with inner diameters of 50, 100 and 150 ?m to simulate trabecular thickness. Values of the linear attenuation coefficients ? in the reconstructed image are commonly affected by beam hardening effects for larger samples and by partial volume effects for small volumes. We implemented an iterative reconstruction technique to reduce beam hardening. Partial voluming was sought to be reduced by excluding voxels near the tube wall. With these two measures, improvement on the constancy of the reconstructed voxel values and linearity with solution concentration could be observed to over 90% accuracy. However, since the expected change in real bone is small more measurements are needed to confirm that micro-CT can indeed be adapted to assess bone mineralization at the tissue level.

Prevrhal, Sven

2005-09-01

386

UNUSUAL CAUSES OF CUTANEOUS ULCERATION  

PubMed Central

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.

Panuncialman, Jaymie; Falanga, Vincent

2010-01-01

387

Dynamic nature of the CT angiographic "spot sign".  

PubMed

The "spot sign", first described in 2007, has shown that a focal area of contrast extravasation within an intracerebral haematoma (ICH) can be correlated with haematoma expansion. We describe a case where time-resolved dynamic CT angiography (dCTA) shows the appearance of the "spot sign" only in later images. This finding highlights the importance of timing of the static CT angiogram which, if performed too early, might result in a false-negative diagnosis. PMID:20846980

Chakraborty, S; Blacquiere, D; Lum, C; Stotts, G

2010-10-01

388

Dynamic nature of the CT angiographic "spot sign"  

PubMed Central

The “spot sign”, first described in 2007, has shown that a focal area of contrast extravasation within an intracerebral haematoma (ICH) can be correlated with haematoma expansion. We describe a case where time-resolved dynamic CT angiography (dCTA) shows the appearance of the “spot sign” only in later images. This finding highlights the importance of timing of the static CT angiogram which, if performed too early, might result in a false-negative diagnosis.

Chakraborty, S; Blacquiere, D; Lum, C; Stotts, G

2010-01-01

389

[CT morphology of hepatocellular carcinoma lesions].  

PubMed

The preoperative CT appearances of hepatocellular carcinoma (HCC) lesions in 232 cases were analyzed. According to the CT features in shape, outline and boundary of the tumors, the HCC was divided into 3 Types: Type I--roundish expansive growth type (REG TYPE), Type II--irregular expansive growth type (IREG TYPE), and type III--irregular infiltration growth type (IIG TYPE). Comparing different CT types with findings at laparotomy or pathological specimens, it showed that the intrahepatic tumor dissemination rates of type I, II and III were 18.6%, 37.7%, and 47.8%, respectively. The lymph node metastasis rates were 0, 7.7% and 23.1%, respectively. The portal vein tumor thrombus formation rates were 2.3%, 20.8% and 46.4%, respectively. The proportion of encapsulation (67.4%, 27.3% and 5.28%, respectively) apparently decreased from type I to type III in turn. The differences were statistically significant. From type I to III the resection rate of large sized tumor decreased, and the prognosis was from bad to worse. Survival analysis (Cox's mode) showed significant differences from type I to type III. Therefore, CT classification may be used to evaluate the gross biological behavior of HCC lesions and may be of pathological and clinical relevance. PMID:8033745

Xie, Q; Zheng, G L; Lin, H G

1994-01-01

390

Pitfalls in PET/CT imaging  

NASA Astrophysics Data System (ADS)

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.

Rondogianni, Ph; Papathanasiou, N.; Giannopoulou, Ch

2011-09-01

391

Gastrointestinal Tract Perforation: MDCT Findings according to the Perforation Sites  

PubMed Central

Our objective is to describe the characteristic CT findings of gastrointestinal (GI) tract perforations at various levels of the gastrointestinal system. It is beneficial to localize the perforation site as well as to diagnose the presence of bowel perforation for planning the correct surgery. CT has been established as the most valuable imaging technique for identifying the presence, site and cause of the GI tract perforation. The amount and location of extraluminal free air usually differ among various perforation sites. Further, CT findings such as discontinuity of the bowel wall and concentrated free air bubbles in close proximity to the bowel wall can help predict the perforation site. Multidetector CT with the multiplanar reformation images has improved the accuracy of CT for predicting the perforation sites.

Kim, Sung Hwan; Jeong, Yong Yeon; Heo, Suk Hee; Kim, Jin Woong; Kang, Heoung Keun

2009-01-01

392

Unusual granulomatous variant of scleromyxedema.  

PubMed

Scleromyxedema is notable for significant morbidity and mortality. A generalized eruption of waxy papules in the absence of thyroid disease with histologic findings of mucin deposition, increased fibroblast proliferation, and fibrosis are the characteristic features of scleromyxedema. We report a case of scleromyxedema that, on histology, was associated with interstitial granuloma annulare-like features. Based on our literature review, this is a rare presentation of this disease. Familiarity with the histologic aspects of scleromyxedema, as described in this report, can help to improve the accuracy of this diagnosis, particularly in atypical presentations. PMID:18485525

Stetsenko, Galina Y; Vary, Jay C; Olerud, John E; Argenyi, Zsolt B

2008-05-15

393

Unusual suicide with a chainsaw.  

PubMed

Described here is a case of suicide with the use of a chainsaw. A female suffering from schizophrenia committed suicide by an ingenious use of a chainsaw that resulted in the transection of her cervical spine and spinal cord. The findings of the resulting investigation are described and the mechanism of suicides with the use of a chainsaw is reviewed. A dry bone study was realized to determine the bone sections, the correlation between anatomic lesions and characteristics of chainsaw. The damage of organs and soft tissues is compared according to the kinds of chainsaw used. PMID:18624895

Tournel, Gilles; Dédouit, Fabrice; Balgairies, Axelle; Houssaye, Cédric; De Angeli, Bérengčre; Bécart-Robert, Anne; Pety, Nicolas; Hédouin, Valéry; Gosset, Didier

2008-07-04

394

Renal medullary ''rings'': possible CT manifestation of hypercalcemia  

SciTech Connect

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.

Curry, N.S.; Gordon, L.; Gobien, R.P.; Lott, M.

1984-01-01

395

Clinical indications and utilization of 320-detector row CT in 2500 outpatients.  

PubMed

Clinical indications and utilization patterns for 3963 CT scans on 2500 consecutive patents on a 320-detector row CT in an outpatient setting were retrospectively analyzed and compared with previously reported CT studies. The impact of the latest generation CT technology, including whole organ perfusion, on indications and utilization patterns during the study period was also assessed. The top five requested CT scan types were abdomen/pelvis, chest, head, sinuses, and coronary CT angiography. Indication and utilization rates were similar to prior studies for abdomen/pelvis, non-cardiac chest, and head CT scans. Abdominal pain and headaches were the most frequent indications for abdomen/pelvis and head CTs, respectively. The 7.3% cardiac CT scan utilization rate was not comparable to rates of up to 72% in self-referral outpatient settings. Whole organ volume CT imaging was utilized in 100% of coronary CT angiography and 22.7% of head CTs. The 320-row CT had fewer negative head and body CT findings as compared to prior reports. The availability of new technology, such as whole organ dynamic scans, appears to have influenced CT indications, utilization and finding rates with a decrease in negative brain and body results. Comparisons with previous outpatient CT studies were similar for multiple categories with the exception of cardiac CT utilization, which is heavily influenced by self-referral. Further study of outpatient imaging indications and utilization rates from multiple centers may benefit from a standardized categorization to improve understanding of the disparate outpatient imaging environment. PMID:21371859

Tabibian, Benjamin; Roach, Cayce J; Hanson, Eric H; Wynn, Brad L; Orrison, William W

2011-03-03

396

An unusual form of fatal ethanol intoxication.  

PubMed

Forensic pathologists are very familiar with deaths due to ethanol intoxication. The overwhelming majority of these deaths are a result of the oral ingestion of ethanol. We report an unusual case of an individual who expired in his secured residence after self administration of a wine enema. Toxicology showed an ethanol concentration of 0.40 g/dL in the blood and 0.41 g/dL in the vitreous fluid. Scene investigation was of paramount importance in determining the unusual method by which the decedent absorbed the alcoholic beverage. PMID:15932106

Wilson, Christopher I; Ignacio, Susan S; Wilson, Gwennaëlle A

2005-05-01

397

Ablation of hepatocellular carcinoma by percutaneous ethanol injection: Imaging findings  

SciTech Connect

Summary. Since PEI is a treatment based on imaging techniques, the radiologist should be familiar with the various findings that may be observed after PEI on US, CT, and MR images immediately after treatment and during later follow-up. Although US is well suited for performing PEI, contrast-enhanced CT currently is the most commonly used imaging method to evaluate the effect of PEI. Residual, nodular areas of contrast enhancement correlate well with residual tumor and warrant additional treatment. Although the findings on MR images obtained after PEI are more complex, MR imaging may be used as an alternative to CT.

Becker, Christoph D.; Grossholz, Marianne [University Hospital of Geneva, Division of Diagnostic and Interventional Radiology (Switzerland); Mentha, Gilles; Roth, Arnaud [University of Geneva, Department of Surgery (Switzerland); Giostra, Emiliano [University Hospital of Geneva, Division of Gastroenterology (Switzerland); Schneider, Pierre-Alain; Terrier, Francois [University Hospital of Geneva, Division of Diagnostic and Interventional Radiology (Switzerland)

1997-05-15

398

Ocular Involvement in Mantle Cell Lymphoma Detected by F 18 FDG PET/CT.  

PubMed

Mantle Cell Lymphoma (MCL) is an uncommon but aggressive form of non-Hodgkin's lymphoma. The extranodal involvement is not unusual especially in bone marrow, spleen, gastrointestinal tract and Waldeyer's ring. Ocular involvement is very exceptional and the most commonly affected site is the orbit (90%), followed by the lacrimal gland (50%) and the eyelids (50%). Today, PET/CT is widely used in non-Hodgkin's lenfoma especially in staging and evaluation of treatment response. Authors report MCL with ocular involvement that was detected on PET/CT scan. Conflict of interest:None declared. PMID:23487006

Ozkan, Elgin; Laçin, Seda; Soydal, Ci?dem; Araz, Mine; Küçük, N Özlem

2011-04-01

399

CT number variations in micro CT imaging systems  

NASA Astrophysics Data System (ADS)

CT numbers can be directly computed from the linear attenuation coefficients in the reconstructed CT images and are correlated to the electron densities of the chemical elements with specific atomic numbers. However, the computed CT numbers can be varied when different imaging parameters are used. Phantoms composed of clinically relevant and tissue-equivalent materials (lung, bone, muscle, and adipose) were scanned with a commercial circular-scanning micro CT imager. This imaging system is composed with a micro-focused x-ray tube and charged-coupled device (CCD) camera as the detector. The mean CT numbers and the corresponding standard deviations in terms of Hounsfield units were then computed from a pre-defined region of interest located within the reconstructed volumetric images. The variations of CT number were then identified from a series of imaging parameters. Those parameters include imaging acquisition modes (e.g., the metal filter used in the x-ray tube), reconstruction methods (e.g., Feldkamp and iterative algorithm), and post-image processing techniques (e.g., ring artifact, beam-hardening artifact, and smoothing processing). These variations of CT numbers are useful and important in tissue characterization, quantitative bone structure analysis, bone marrow density evaluation, and Monte Carlo dose calculations for the pilot small animal study when micro CT imaging systems are employed. Also these variations can be used as the quantification for the performance of the micro CT imaging systems.

Tu, Shu-Ju; Hsieh, Hui-Ling; Chao, Tsi-Chian

2008-04-01

400

Staging of peritoneal carcinomatosis: enhanced CT vs. PET\\/CT  

Microsoft Academic Search

Purpose  To assess and compare the performance of CT and 18F-FDG-PET\\/CT in the evaluation of peritoneal carcinomatosis (PC).\\u000a \\u000a \\u000a \\u000a Method and materials  Thirty consecutive patients with PC and scheduled for a surgery underwent a CT of the abdomen and pelvis and a whole-body\\u000a 18F-FDG PET\\/CT. The extent of PC was assessed precisely using the peritoneal cancer index combining the distribution of tumor\\u000a throughout

Clarisse Dromain; Sophie Leboulleux; Anne Auperin; Diane Goere; David Malka; Jean Lumbroso; Martin Schumberger; Robert Sigal; Dominique Elias

2008-01-01

401

Unusually Effective Schools: A Review and Analysis of Research and Practice.  

ERIC Educational Resources Information Center

|A synthesis of research on unusually effective schools is presented in this monograph, with a focus on research conducted since 1985. Three major issues are addressed: (1) the viability of the effective school concept in contemporary school reform; (2) the correlation between recent research and basic findings; (3) and the congruency of school…

Levine, Daniel U.; Lezotte, Lawrence W.

402

Unusual fatty acids in the lipids from organs and cell cultures of Petroselinum crispum  

Microsoft Academic Search

The lipids of seeds, leaves, and roots of parsley,Petroselinum crispum, and of heterotrophic as well as photomixotrophic cell cultures of this plant were characterized with the aim of finding a system for studying the biosynthesis of unusual fatty acids. It was found that (Z)-6-octadecenoic acid, petroselinic acid, which is the typical constituent fatty acid of triacylglycerols in seeds, occurs only

Friedhelm Ellenbracht; Wolfgang Barz; Helmut K. Mangold

1980-01-01

403

Performance of integrated FDG–PET\\/contrast-enhanced CT in the diagnosis of recurrent ovarian cancer: comparison with integrated FDG–PET\\/non-contrast-enhanced CT and enhanced CT  

Microsoft Academic Search

Purpose  The aim of this study was to evaluate the accuracy of integrated positron emission tomography and computed tomography (PET\\/CT)\\u000a using 18F-fluorodeoxyglucose with IV contrast for depiction of suspected recurrent ovarian cancer and to assess the impact of PET\\/contrast-enhanced\\u000a CT findings on clinical management, compared with PET\\/non-contrast-enhanced CT and CT component.\\u000a \\u000a \\u000a \\u000a Methods  One hundred thirty-two women previously treated for ovarian cancer underwent

Kazuhiro Kitajima; Koji Murakami; Erena Yamasaki; Yasushi Domeki; Yasushi Kaji; Ichio Fukasawa; Noriyuki Inaba; Narufumi Suganuma; Kazuro Sugimura

2008-01-01

404

Comparison of computed tomographic and cytopathological findings in the evaluation of adult orbital mass.  

PubMed

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

Islam, M N; Amin, M S; Dipi, R M; Khan, N A

2013-01-01

405

CT evaluation of intracholecystic bile  

SciTech Connect

Computed tomography (CT) has been used to detect a variety of gallbladder abnormalities, but the accuracy of routine abdominal CT in evaluating intracholecystic bile has not been established. Forty-six patients were identified in whom abdominal CT and sonography were performed within 1 week of each other. Using sonographic results as the standard, sensitivity specificity, and accuracy of CT gallbladder evaluation were calculated; both initial CT interpretations and retrospective review of scans were used for this analysis. In the retrospective review, visual interpretation of gallbladder images and measurement of intracholecystic bile attenuation were analyzed. The most common cause of high-attenuation bile in the series was sludge, a cause not previously reported. It was concluded that intracholecystic bile is poorly evaluated on routine abdominal CT, particularly because of low sensitivity in disease detection.

Rebner, M.; Ruggieri, P.M.; Gross, B.H.; Glazer, G.M.

1985-08-01

406

Spiral CT vs incremental CT: is spiral CT superior in imaging of the brain?  

PubMed

The aim of this study was to evaluate image quality of spiral CT of the brain as compared with incremental CT using identical scanning parameters. Incremental or spiral cranial CT was performed on 46 consecutive, randomized patients with non-traumatic disease of the brain on a Siemens (Erlangen, Germany) Somatom Plus 4. Evaluation was done in a randomized blinded way by two experienced radiologists. Different anatomical structures, image noise, and artifacts were scaled 1 (bad) to 4 (very good). Statistical analysis was done using the F-test of variance for partial sums of squares as well as Student's t-test. Incremental CT was superior to spiral CT for evaluation of the internal capsule, supratentorial artifacts, gray/white matter differentiation, and image noise. No statistically significant differences were seen for evaluation of the pons, infratentorial artifacts, and eye muscles. With identical scanning parameters incremental CT is superior to spiral CT in the assessment of small, complex structures in a low-contrast setting. No differences are seen for larger structures or small structures in a medium-contrast range. Artifacts localized close to the skull in spiral CT can easily mimic hemorrhage in traumatized patients. Spiral CT should therefore only be used for CT angiography and if 3D reconstructions are needed. PMID:9510574

Bahner, M L; Reith, W; Zuna, I; Engenhart-Cabillic, R; van Kaick, G

1998-01-01

407

SPECT-Guided CT for Evaluating Foci of Increased Bone Metabolism Classified as Indeterminate on SPECT in Cancer Patients  

Microsoft Academic Search

Hybridcameras combiningSPECT andspiral CToffertheoppor- tunity to obtain a diagnostic-quality CT image of scintigraphically suggestivelesionsthatdirectlycorrelateswiththeSPECTimage. The field of view of the CT scan can be adapted on the basis of the SPECT findings (''SPECT-guided CT''). The aim of the pres- entstudy was to investigate the value of SPECT-guided CT in the assessment of foci of increased bone metabolism classified as indeterminate

Wolfgang Romer; Anton Nomayr; Michael Uder; Werner Bautz; Torsten Kuwert

2006-01-01

408

Evaluation of the Circle of Willis with Three-dimensional CT Angiography in Patients with Suspected Intracranial Aneurysms  

Microsoft Academic Search

PURPOSE: To determine the usefulness of CT angiography in the setting of suspected acute subarachnoid hemorrhage or intracranial aneurysm. METHODS: We prospectively studied 68 patients suspected of having subarachnoid hemorrhage or an intracranial aneurysm with noncon- trast CT of the head followed immediately by contrast-enhanced helical CT of the circle of Willis with three-dimensional reconstruction. Twenty-seven patients with CT findings

Ronald A. Alberico; Mahendra Patel; Sean Casey; Betsy Jacobs; William Maguire; Robert Decker

409

Leiomyoma in Retzius' space: An unusual location  

PubMed Central

We report the case of a 54-year-old woman who presented to our hospital with microscopic hematuria. An imaging study revealed a tumour in the Retzius’ space. The tumour was surgically removed by an abdominal approach. Pathological examination revealed a leiomyoma. This case demonstrates a leiomyoma in an unusual location.

Niwa, Naoya; Yanaihara, Hitoshi; Horinaga, Minoru; Asakura, Hirotaka

2013-01-01

410

Unusual manifestation of Marden-Walker syndrome.  

PubMed

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

Taksande, Amar M; Vilhekar, K Y

2012-05-01

411

Q fever endocarditis: an unusual presentation.  

PubMed

Coxiella burnetii, the agent of Q fever, is an obligate intracellular pathogen typically associated with exposure to livestock. This organism may present with acute or chronic manifestations, the most typical chronic manifestation being endocarditis. We report a highly unusual case of Q fever endocarditis acquired in the United States marked by atypical cardiac manifestations. PMID:23090066

Griffin, Allen T; Espinosa, Martin; Nakamatsu, Raul

2012-12-01

412

Cholelithoptysis: An unusual complication of laparoscopic cholecystectomy  

Microsoft Academic Search

Laparoscopic cholecystectomy is emerging as a preferred surgical method in the treatment of cholecystitis. Decreased morbidity and mortality rates make this an attractive altenative to conventional cholecystectomy. Recently, specific complications including bile duct transection, biloma formation, and liver lacerations have been reported. We report here, however, an unusual case of intraoperative spillage of stones into the introperitoneal cavity. Subsequent erosion

Jill Thompson; Etta Pisano; David Warshauer

1995-01-01

413

An unusual urine leak with urolithiasis.  

PubMed

Urine leaks usually result from blunt or penetrating trauma to the kidneys. Occasionally, urine leaks can be caused by back pressure from urinary obstruction caused by large urinary stones or a pelvic mass. We present the case of a 56-year-old man with an unusual urine leak caused by a small 2-mm renal stone. PMID:24089065

Ma, Hong Yun; Blaufox, M Donald

2013-11-01

414

The unusual helium variable AM Canum Venaticorum  

Microsoft Academic Search

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.

J. L. Provencal; D. E. Winget; R. E. Nather; E. L. Robinson; J.-E. Solheim; J. C. Clemens; P. A. Bradley; S. J. Kleinman; A. Kanaan; C. F. Claver; C. J. Hansen; T. M. K. Marar; S. Seetha; B. N. Ashoka; E. M. Leibowitz; E. G. Meistas; A. Bruvold; G. Vauclair; N. Dolez; M. Chevreton; M. A. Barstow; A. E. Sansom; R. W. Tweedy; G. Fontaine; P. Bergeron; S. O. Kepler; M. A. Wood; A. D. Grauer

1995-01-01

415

Leiomyoma in Retzius' space: An unusual location.  

PubMed

We report the case of a 54-year-old woman who presented to our hospital with microscopic hematuria. An imaging study revealed a tumour in the Retzius' space. The tumour was surgically removed by an abdominal approach. Pathological examination revealed a leiomyoma. This case demonstrates a leiomyoma in an unusual location. PMID:24069108

Niwa, Naoya; Yanaihara, Hitoshi; Horinaga, Minoru; Asakura, Hirotaka

2013-09-01

416

[Unusual skin burn during cesarean section].  

PubMed

The author reports on an unusual case of a skin burn at the inside of the thigh caused by contact between the electrocoagulating device and amnion. The technicalities involved are presented and the possibilities of preventing such accidents are discussed. PMID:3710124

Deck, H

1986-04-01

417

Unusual extrahepatic metastatic sites from hepatocellular carcinoma  

PubMed Central

The author examined unusual extrahepatic metastatic sites from liver hepatocellular carcinomas (HCCs) in autopsy and surgical files at our laboratory in the last 10 years. In autopsy cases (n=31), extrahepatic metastases were present in 21 cases (68%). The most common metastatic sites were lung (n=18). Unusual extrahepatic metastatic sites in the autopsy series were abdominal regional lymph nodes (n=6), bones (n=5), diaphragma (n=2), pancreas (n=2), gall bladder (n=1), stomach (n=1), colon (n=1), adrenal gland (n=1), pleura (n=1), peritoneum (n=1), cervical lymph nodes (n=1), and shoulder soft tissue (n=1). In surgical cases (n=21), in which extrahepatic tumors were excised, the lung was the most common, and accounted for 16 cases. The unusual extrahepatic metastatic sites in the surgical series were bones (n=2), brain (n=1), skin (n=1), and oral cavity (n=1). Immunohistochemical demonstration of HepPar1 and AFP were recognized in 12 of 12 surgical cases examined and 8 of the 12 surgical cases examined, respectively. Cytokeratin 8 and 18 were expressed in 6 of 6 surgical cases and 7 of 7 surgical cases examined. These data shows that HCC can metastasize in various organs other than the lung, and HepPar1 and AFP were good markers of extrahepatic metastases of these unusual sites of metastatic foci from HCC.

Terada, Tadashi; Maruo, Hirotoshi

2013-01-01

418

Unusual manifestation of Marden-Walker syndrome  

PubMed Central

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.

Taksande, Amar M.; Vilhekar, K. Y.

2012-01-01

419

Actinomycosis: an unusual complication following appendicitis.  

PubMed

We present a report of a case of retroperitoneal actinomycosis 3 years after appendectomy for a ruptured appendix. Actinomycosis is an unusual infectious disease that occasionally occurs after enteric perforation. The literature is reviewed, and the pathogenesis, diagnosis, and treatment are discussed. PMID:2318682

Castillenti, T A; Conklin, C R

1990-03-01

420

On the merits of ``Unusual Field Trips''  

NASA Astrophysics Data System (ADS)

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.

Howarth, Dean E.

1999-11-01

421

CT scans of first-break psychotic patients in good general health.  

PubMed

A computed tomography (CT) scan of the head is often routine for patients with new-onset psychosis to rule out somatic causes. Charts of 127 such patients admitted to a major military medical center were examined. Most patients were young and otherwise in good health. Relationships were examined between CT scan findings and demographic variables, seizure history, neurological abnormalities, and discharge diagnosis. None of the 127 patients had an abnormal scan; four had incidental findings. Incidental findings were strongly associated with ethnic minority status but not with neurologic abnormalities, seizure history, or diagnosis. Findings suggest that routine CT scans for all newly psychotic military patients may not be warranted. PMID:9575012

Bain, B K

1998-02-01

422

[Unusual presentation of rib malformation].  

PubMed

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

Cosson, M-A; Breton, S; Aprahamian, A; Grevent, D; Cheron, G

2012-10-01

423

Utility of CT perfusion with 64-row multi-detector CT for acute ischemic brain stroke.  

PubMed

We investigated the utility of computed tomographic (CT) perfusion (CTP) with 64-row multi-detector row CT (MDCT) to diagnose acute infarction and ischemic penumbra. We reviewed 58 clinical cases with acute ischemic stroke with CTP, compared the size of the area with long mean transit time (MTT) to that with abnormal intensity in magnetic resonance (MR) diffusion-weighted imaging (DWI) to diagnose penumbra, and compared the size of the area with reduced cerebral blood volume (CBV) in CTP to that in MR DWI to evaluate sensitivity for infarction. The total sensitivity of MTT to acute ischemic lesions was 81% (47/58). Sensitivity of MTT to segmental lesions was 100% (42/42) and for spot and focal lesions, 31% (5/16). In 13 patients, penumbra was diagnosed as lesions mismatched between MTT in CTP and MR DWI. When we regarded a lesion with decreased CBV as infarction, the sensitivity of CBV to segmental lesions was 85% (11/13), and the sensitivity to small infarction was 14% (4/28). Use of 64-row MDCT improves coverage and radiation exposure in head CTP. The combination of plain CT, CT angiography, and CTP with MDCT can demonstrate all segmental ischemic lesions and most large segmental infarctions, and their combined application is useful in considering indication and contraindication for thrombolysis. The problem of low sensitivity for small lesions remains, and MR DWI may be required to assess small infarctions when findings from combined plain CT, CT angiography, and CTP are negative in patients with suspected acute brain stroke. PMID:20842402

Suzuki, Kazufumi; Morita, Satoru; Masukawa, Ai; Machida, Haruhiko; Ueno, Eiko

2010-09-15

424

Second century megadrought in the Rio Grande headwaters, Colorado: How unusual was medieval drought?  

NASA Astrophysics Data System (ADS)

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.

Routson, Cody C.; Woodhouse, Connie A.; Overpeck, Jonathan T.

2011-11-01

425

Stabilization of Actinides and Lanthanides in Unusually High Oxidation States.  

National Technical Information Service (NTIS)

Chemical environments can be chosen which stabilize actinides and lanthanides in unusually high or low oxidation states and in unusual coordination. In many cases, one can rationalize the observed species as resulting from strong charge/size influences pr...

P. G. Eller R. A. Penneman

1986-01-01

426

14 CFR 1206.608 - Time extensions in unusual circumstances.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Time extensions in unusual circumstances... AVAILABILITY OF AGENCY RECORDS TO MEMBERS...1206.608 Time extensions in unusual circumstances...specific request for an Agency record. (b) If an extension of time...

2013-01-01

427

Pictorial essay: CT scan of appendicitis and its mimics causing right lower quadrant pain  

PubMed Central

CT scanning is widely used in the diagnostic workup of right lower quadrant pain. While appendicitis remains the most frequent cause, a majority of patients referred for suspected appendicitis turn out to have alternative diagnoses or a normal CT study. The purpose of our pictorial essay is to present an overview of the CT findings of appendicitis and its common mimics and to highlight the features that provide clues to alternative diagnoses.

Sharma, Monika; Agrawal, Anjali

2008-01-01

428

Parenchymal liver enhancement with bolus-triggered helical CT: preliminary clinical results.  

PubMed

A software-driven device for bolus-triggered start of helical computed tomography (CT) was evaluated in liver studies of 30 patients with suspected metastatic liver disease. Compared with results in a control group of 30 patients who underwent conventional contrast material-enhanced helical CT, the study group had significantly higher and more constant parenchymal enhancement (P < .05, Mann-Whitney U test). This technique helps optimize findings at contrast-enhanced helical CT. PMID:7892486

Kopka, L; Funke, M; Fischer, U; Vosshenrich, R; Oestmann, J W; Grabbe, E

1995-04-01

429

CT navigated lateral interbody fusion.  

PubMed

Lateral interbody fusion techniques are heavily reliant on fluoroscopy for retractor docking and graft placement, which expose both the patient and surgeon to high doses of radiation. Use of image-guided technologies with CT-based images, however, can eliminate this radiation exposure for the surgeon. We describe the surgical technique of performing lateral lumbar interbody fusion using CT navigation. PMID:23931938

Drazin, Doniel; Liu, John C; Acosta, Frank L

2013-08-06

430

Children's (Pediatric) CT (Computed Tomography)  

MedlinePLUS

... the CT scanner. top of page • How it works In many ways, CT scanning is like other x-ray examinations. X-rays are a form of radiation, like light or radio waves that can be directed at the body. ...

431

Computed Tomography (CT) Scans and Cancer  

MedlinePLUS

... create both types of pictures. Most modern CT machines take continuous pictures in a helical (or spiral) ... slices of the body, as the original CT machines did. Helical CT has several advantages over older ...

432

Quantitative SPECT/CT.  

PubMed

Conventional nuclear medical imaging uses radiopharmaceuticals labeled by single-photon emitters such as Tc-99m, I-123, or I-131 in vivo. Classical clinical examples are the study of bone metabolism by bone scintigraphy with the Tc-99m-labeled polyphosphonates or of iodine transport into the thyroid gland using Tc-99m-pertechnetate. With single-photon emission-computed tomography (SPECT), the distribution of these radiopharmaceuticals within the human body is three-dimensionally visualized. Contrary to positron emission tomography (PET), current SPECT technology does not allow the quantification of regional values of radioactivity tissue concentration as SPECT images are grossly compromised by artifacts caused by photon scatter and attenuation. With the advent of hybrid imaging systems combining a SPECT camera with an X-ray computerized (CT) scanner in one gantry, reliable corrections for these artifacts seem possible, allowing truly quantitative SPECT. PMID:23179886

Ritt, Philipp; Kuwert, Torsten

2013-01-01

433

Evaluation of bowel and mesenteric blunt trauma with multidetector CT.  

PubMed

Bowel and mesenteric injuries are detected in 5% of blunt abdominal trauma patients at laparotomy. Computed tomography (CT) has been shown to be accurate for the diagnosis of bowel and mesenteric injuries and is the diagnostic test of choice in the evaluation of blunt abdominal trauma in hemodynamically stable patients. Specific CT findings of bowel and mesenteric injuries include bowel wall defect, intraperitoneal and mesenteric air, intraperitoneal extraluminal contrast material, extravasation of contrast material from mesenteric vessels, and evidence of bowel infarct. Specific signs of mesenteric injury are vascular beading and abrupt termination of mesenteric vessels. Less specific signs of bowel and mesenteric injuries include focal bowel wall thickening, mesenteric fat stranding with focal fluid and hematoma, and intraperitoneal or retroperitoneal fluid. When only nonspecific signs of bowel and mesenteric injuries are seen on CT images, correlation of CT features with clinical findings is necessary. A repeat CT examination after 6-8 hours if the patient's condition is stable may help determine the significance of these nonspecific findings. PMID:16844935

Brofman, Nicole; Atri, Mostafa; Hanson, John M; Grinblat, Leonard; Chughtai, Talat; Brenneman, Fred

434

Diagnostic Performance of CT Colonography for the Detection of Colorectal Polyps  

PubMed Central

Objective To investigate the diagnostic value of CT colonography for the detection of colorectal polyps. Materials and Methods From December 2004 to December 2005, 399 patients underwent CT colonography and follow-up conventional colonoscopy. We excluded cases of advanced colorectal cancer. We retrospectively analyzed the CT colonography findings and follow-up conventional colonoscopy findings of 113 patients who had polyps more than 6 mm in diameter. Radiologists using 3D and 2D computer generated displays interpreted the CT colonography images. The colonoscopists were aware of the CT colonography findings before the procedure. Results CT colonography detected 132 polyps in 107 of the 113 patients and conventional colonoscopy detected 114 colorectal polyps more than 6 mm in diameter in 87 of the 113 patients. The sensitivity of CT colonography analyzed per polyp was 91% (41/45) for polyps more than 10 mm in diameter and 89% (101/114) for polyps more than 6 mm in diameter. Thirteen polyps were missed by CT colonography and were detected on follow-up conventional colonoscopy. Conclusion CT colonography is a sensitive diagnostic tool for the detection of colorectal polyps and adequate bowel preparation, optimal bowel distention and clinical experience are needed to reduce the rate of missing appropriate lesions.

Ro, Hee Jeong; Park, Jong Beom; Choi, Jung-Bin; Chung, Ji Eun; Kim, Yong Jin; Suh, Won Hyuck; Lee, Jong Kyun

2007-01-01

435

Unusual causes of papilledema: Two illustrative cases  

PubMed Central

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.

Nguyen, Ha Son; Haider, Kathryn M.; Ackerman, Laurie L.

2013-01-01

436

Allantoic cyst - an unusual umbilical cord swelling  

PubMed Central

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.

Gupta, N; Corbett, H; Ismail, R; Sathanantharajah, R; Sivakumar, S; McCarthy, Liam

2011-01-01

437

[Rare or unusual forms of psoriasis].  

PubMed

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

Cribier, B

2012-04-01

438

Unusual ghost image in a panoramic radiograph  

PubMed Central

A panoramic radiograph was taken for a 9-year-old female patient with her earrings on; thus, artefactual shadows were cast on the radiograph. In addition to the two real images of the earrings, three additional images were seen corresponding to ghost images of the earrings. They were unusual not only in appearance but also because there were three in number. This paper discusses the cause of such images as it revisits the principles of panoramic radiology with respect to ghost images.

Venkatraman, S; Gowda, JS; Kamarthi, N

2011-01-01

439

Triple Teeth: Report of an Unusual Case  

PubMed Central

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.

Babaji, Prashant; Prasanth, M. A.; Gowda, Ajith R.; Ajith, Soumya; D'Souza, Henston; Ashok, K. P.

2012-01-01

440

Polyglucosan body disease myopathy: an unusual presentation.  

PubMed

Polyglucosan body disease (PBD) is a slowly progressive adult-onset glycogen storage disorder that typically affects upper and lower neurons. Myopathy, as a complication of PBD has been reported rarely and clinically manifests as chronic limb-girdle muscle weakness. We report an unusual case of PBD myopathy presenting as an asymmetric motor syndrome that clinically overlapped with amyotrophic lateral sclerosis, further expanding the phenotype of this disorder. PMID:17221878

Vucic, Steve; Pamphlett, Roger; Wills, Edward J; Yiannikas, Con

2007-04-01

441

Unexpected and unusual failures of polymeric materials  

Microsoft Academic Search

Polymeric products are produced with the expectation that they will process satisfactorily and perform as intended without failure. Yet polymers do fail sometimes. The failures are often completely unexpected or unusual and the causes may not be easy to determine. This paper brings together such failures under five categories:1.In production or processing of polymers.2.Assembly of polymers into products.3.Unauthorized or unexpected

Myer Ezrin; Gary Lavigne

2007-01-01

442

An Unusual Cause of Precordial Chest Pain  

PubMed Central

Extraskeletal chondrosarcoma in anterior mediastinum is very rare. A 45-year-old male patient was admitted to the hospital with precordial chest pain. A large and well-shaped mass in the anterior mediastinum was seen radiologically, and there was a clearly compression of the heart by the mass. The lesion was totally resected, and extraskeletal mediastinal chondrosarcoma was histopathologically diagnosed. We aimed to present and discuss the radiologic, clinic, and histopathologic features of unusual presentation of extraskeletal chondrosarcoma in a case.

Ozkaya, Sevket; Furtun, Kamil; Yuksel, Canan; Dirican, Adem; Findik, Serhat

2013-01-01

443

An Unusual Case of Refractory Metabolic Acidosis  

PubMed Central

Homeopathy is one of the most frequently used systems of complementary and alternative medicine. The patients who seek homeopathic treatment are primarily those suffering from long-standing, chronic diseases. These medicines may have considerable risk of severe side effects. Some homeopathic medicinal preparations use alcohol as a base and are frequently prescribed for common conditions. We hereby report an unusual case of refractory metabolic acidosis after homeopathic medicinal treatment.

Sawlani, Kamal Kumar; Chaudhary, Shyam Chand; Patil, Malagouda Rajagouda; Yathish, Besthanahalli Errapa; Chandra, Amit

2013-01-01

444

Genital incarceration: an unusual case report  

PubMed Central

Incarceration or strangulation of the penis is a rare clinical situation that requires emergent urologic management to prevent potentially devastating outcomes. Many different techniques have been described in the literature to remove genital foreign objects, but there is no universally successful technique. We present an unusual and challenging case involving incarceration of both the penis and scrotum by multiple metallic rings that required operative removal using an orthopedic high-speed drill.

Cassidy, Darby J.; Mador, David

2010-01-01

445

An unusual quinolinone alkaloid from Waltheria douradinha.  

PubMed

The chemical investigation of the methanolic extract of the root bark of Waltheria douradinha (Sterculiaceae) afforded an unusual quinolinone alkaloid named waltherione-A (1). Its structure was determined mainly by NMR spectroscopic methods. The antibacterial activity of waltherione-A (1) and the corresponding O-methylated derivative (2) was tested against three gram-negative and three gram-positive bacteria, with only (2) having moderate activity. PMID:15924921

Hoelzel, Solange C S M; Vieira, Eleno R; Giacomelli, Sandro R; Dalcol, Ionara I; Zanatta, Nilo; Morel, Ademir F

2005-05-01

446

Unusual cyclolanostanes from leaves of Pandanus boninensis.  

PubMed

Two unusual triterpenoids, (24S)-24-methyl-25,32-cyclo-5alpha-lanosta-9(11)-en-3beta-ol and (24S)-24-methyl-25,32-cyclo-cycloartane-3beta-ol, were isolated from leaves of Pandanus boninensis along with known triterpenoids and lignans. Their structures were established on the basis of spectroscopic methods and X-ray analysis. PMID:16229870

Inada, Akira; Ikeda, Yasuyuki; Murata, Hiroko; Inatomi, Yuka; Nakanishi, Tsutomu; Bhattacharyya, Kinkini; Kar, Tanusree; Bocelli, Gabriele; Cantoni, Andrea

2005-10-14

447

Unusual Esophageal Foreign Body: A Table Fork  

PubMed Central

The presence of an esophageal foreign body (EFB) is a medical emergency requiring urgent evaluation and treatment. Swallowing of foreign bodies is most common in children aged between 6 months and 6 years, in whom it usually occurs during games. In adults, foreign bodies tend to be ingested accidentally together with food. The authors report an unusual case of EFB (a table fork) in an adult and briefly report the clinical presentation and the therapeutic procedures adopted in this case and similar cases.

Mevio, Emilio; Mevio, Niccolo

2013-01-01

448

Unusual complications of ventriculo peritoneal shunt surgery  

PubMed Central

Ventriculo peritoneal (VP) shunt surgery is one of the common neurosurgical procedures employed in the management of hydrocephalus. Numerous complications related to this procedure are reported in the literature. Peritoneal catheter-related complications are the usual causes of the shunt malfunction. We report three unusual cases of peritoneal shunt catheter migration in children. Two cases are of anal and one vaginal extrusion. Possible mechanisms of migration and management strategies were discussed.

Teegala, Ramesh; Kota, Laxmi Prasanna

2012-01-01

449

Unusual complications of ventriculo peritoneal shunt surgery.  

PubMed

Ventriculo peritoneal (VP) shunt surgery is one of the common neurosurgical procedures employed in the management of hydrocephalus. Numerous complications related to this procedure are reported in the literature. Peritoneal catheter-related complications are the usual causes of the shunt malfunction. We report three unusual cases of peritoneal shunt catheter migration in children. Two cases are of anal and one vaginal extrusion. Possible mechanisms of migration and management strategies were discussed. PMID:23189000

Teegala, Ramesh; Kota, Laxmi Prasanna

2012-09-01

450

Prenatal Ultrasound Findings of Fetal Neoplasms  

PubMed Central

A variety of neoplasms can develop in each tetal organ. Most fetal neoplasms can be detected by careful prenatal ultrasonographic examination. Some neoplosms show specific ultrasonographic findings suggesting the differential diagnosis, but others do not. Knowledge of the presence of a neoplasm in the fetus may alter the prenatal management of a pregnancy and the mode of delivery, and facilitates immediate postnatal treatment. During the last five years, we experienced 32 cases of fetal neoplasms in a variety of organs. We describe their typical ultrasonographic findings with correlating postnatal CT, MRI, and pathologic findings.

Lee, Soo-Hyun; Song, Mi Jin; Min, Jee-Yeon; Han, Byoung Hee; Lee, Young Ho; Cho, Byung Jae; Kim, Seung Hyup

2002-01-01

451

An unusual late sequel to hysterectomy.  

PubMed Central

A case is reported of a large infected foreign body granuloma associated with a retained non-opaque swab presenting 9 years after hysterectomy. An abdominal radiography and whole body computed tomography (CT) scanning demonstrated gas collections in a large abdominal mass. The case underlines the necessity for using radioopaque swabs in all surgical operations. Images Fig. 1 Fig. 2 Fig. 3

Hertzanu, Y.; Hurwitz, J.

1983-01-01

452

Unusually high rotational temperature of the CN radical  

NASA Astrophysics Data System (ADS)

We analyse a high-resolution, high signal-to-noise spectrogram of the hot reddened star Trumpler 16 112 to find relationships between the physical parameters of the intervening interstellar medium (e.g., the rotational temperature of the CN radical) and the intensities of interstellar lines/bands. We report on the discovery of an interstellar cloud that shows an exceptionally high rotational temperature of CN (4.5 K) and unusually strong Ca I and Fe I interstellar lines. This rare CaFe-type cloud seemingly contains no diffuse band carriers. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile. Programs 073.D-0609(A) and 082.C-0566(A).

Kre?owski, J.; Galazutdinov, G.; Beletsky, Y.

2011-07-01

453

Nonspecific necrotizing petrositis: an unusual complication of otitis in children.  

PubMed

Three cases of an unusual form of suppurative chronic otitis media in children 2 and 3 years old are presented. The clinical feature common to all cases was otorrhea, beginning at the first months of life, with a silent evolution to a complete peripheral facial paralysis. In one case the facial paralysis was bilateral. The treatment applied was surgical: subtotal petrosectomy. The surgical findings were bloody granulation tissue, sequestering completely the otic capsule. The facial nerve was destroyed almost the total length of the Fallopian canal in all cases. The histopathologic examination revealed a destructive and nonspecific chronic inflammatory process. The culture showed Gram-negative organisms, such as Pseudomonas aeruginosa and Proteus mirabilis. Etiologic aspects involved in the process are discussed and the name non-specific necrotizing petrositis is suggested to individualize this rare form of otitis which, with morbidity, leads to severe complications such as facial paralysis and deafness. PMID:6433126

Stamm, A C; Pinto, J A; Cóser, P L; Marigo, C

1984-09-01

454

Unusual cases of multiple symmetrical lipomatosis with neurological disorders.  

PubMed

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

Triantafyllou, Nikolaos I; Zalonis, Ioannis; Kararizos, Grigoris; Gkiatas, Konstantinos; Christidi, Fotini; Kararizou, Evangelia

2009-12-01

455

Unusual Cases of Multiple Symmetrical Lipomatosis with Neurological Disorders  

PubMed Central

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.

Triantafyllou, Nikolaos I.; Zalonis, Ioannis; Kararizos, Grigoris; Gkiatas, Konstantinos; Christidi, Fotini; Kararizou, Evangelia

2009-01-01

456

Unusual presentation of Lyme disease: Horner syndrome with negative serology.  

PubMed

Early disseminated Lyme disease can be difficult to diagnose because of atypical symptoms and physical findings. A clinical diagnosis must be made in the absence of confirmatory serologic testing to allow timely therapy. We report a case of a 69-year-old woman who presents with fever, Horner syndrome, and a 12-cm oval-shaped erythematous macular rash with multiple vesiculopustular eruptions. The patient recovered after appropriate intravenous antibiotics, but serologic testing only confirmed the diagnosis 4 weeks later. This case also describes an unusual complication involving the neurologic system. We illustrate the clinical presentation and review the medical literature. Lyme disease should always be considered in patients from endemic regions with viral-like symptoms or a new rash. PMID:19264948

Morrison, Candis; Seifter, Ari; Aucott, John N

457

Can clinical CT data improve forensic reconstruction?  

PubMed

In accidents resulting in severe injuries, a clinical forensic examination is generally abandoned in the initial phase due to high-priority clinical needs. However, in many cases, data from clinical computed tomography (CT) examinations are available. The goals of this prospective study were (a) to evaluate clinical CT data as a basis for forensic reconstruction of the sequence of events, (b) to assess if forensic radiological follow-up reading improves the forensic diagnostic benefit compared to the written clinical radiological reports, and (c) to evaluate if full data storage including additional reconstructed 0.6-mm slices enhances forensic analysis. Clinical CT data of 15 living individuals with imaging of at least the head, thorax, and abdomen following polytrauma were examined regarding the forensic evaluation of the sequence of events. Additionally, 0.6-mm slices and 3D images were reconstructed for forensic purposes and used for the evaluation. At the forensic radiological readings, additional traumatic findings were observed in ten of the 15 patients. The main weakness of the clinical reports was that they were not detailed enough, particularly regarding the localization of injuries and description of wound morphology. In seven cases, however, forensic conclusions were possible on the basis of the written clinical reports, whereas in five cases forensic reconstruction required specific follow-up reading. The additional 0.6-mm slices were easily available and with improved 3D image quality and forensic diagnostics. In conclusion, the use of clinical CT data can considerably support forensic expertise regarding reconstruction issues. Forensic follow-up reading as well as the use of additional thin slices for 3D analysis can further improve its benefit for forensic reconstruction purposes. PMID:23412132

Schuh, P; Scheurer, E; Fritz, K; Pavlic, M; Hassler, E; Rienmüller, R; Yen, K

2013-02-15

458