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1

Unusual perforated appendicitis within umbilical hernia: CT findings  

Microsoft Academic Search

We present the first imaging report of perforated appendicitis in an umbilical hernia. Computed tomography demonstrated a\\u000a gas-forming abscess within an umbilical hernia and the cecum was found inside the hernial sac, with an inner relation to the\\u000a abscess. Computed tomographic findings suggested appendicitis as possible diagnosis, which was confirmed at surgery. Physicians\\u000a must consider appendicitis within the differential diagnosis

J. Arnáiz; A. Ortiz; E. Marco de Lucas; T. Piedra; J. Jorda ´; A. M. Arnáiz; M. A. Pagola

2006-01-01

2

A case of pulmonary choriocarcinoma metastasis with unusual FDG-PET and CT findings: correlation with pathology.  

PubMed

A 26-year-old female who had had a hydatidiform mole at 20 years of age showed high levels of serum human chorionic gonadotropin. Because pelvic ultrasound did not show any gestational sac in her uterus, she was suspected to have had an extrauterine pregnancy and a spontaneous abortion. About 6 months later, a pulmonary nodule in the patient's right upper lung field was found on a routine chest X-ray film. Contrast- enhanced CT scans revealed a solitary lobulated nodule 2.0 × 1.3 × 3.0 cm in diameter in the S2 segment of the right lung. CT suggested a vessel malformation. Positron emission tomography using 2-deoxy-2-[(18)F]fluoro-D-glucose (FDG-PET) was performed and showed weak FDG accumulation (SUVmax = 2.0) in the nodule, which did not positively indicate malignancy. Because a follow-up CT showed a rapid increase in the size of the nodule, partial resection of S2 segment in the right upper lobe was performed. The histopathological diagnosis was a metastasis from choriocarcinoma. The tumor consisted largely of necrosis and hemorrhage, and it was considered to be a major cause of the unusual FDG-PET and CT findings. PMID:22893003

Maruoka, Yasuhiro; Abe, Koichiro; Baba, Shingo; Isoda, Takuro; Matsuo, Yoshio; Kubo, Yuichiro; Ogawa, Shinji; Yano, Tokujiro; Sasaki, Masayuki; Honda, Hiroshi

2012-12-01

3

An Unusual Case of Ascending Pancreatitis with Mediastinal Involvement: A Case Report with CT and MRI Findings  

PubMed Central

Fluid collections are common findings of pancreatitis and spread, more often, along preferential drainage pathways in the abdomen. In some rare cases, fluid collections may spread towards extra-abdominal sites like the mediastinum leading to the formation of mediastinal collections. We present the case of a 52-years-old man with pain in the right upper quadrant of the abdomen and mid-epigastrium lasting for some hours. Laboratory tests suggested a diagnosis of pancreatitis. CT and subsequent MRI revealed changes consistent with acute exacerbation on chronic pancreatitis spreading to the mediastinum and to the greater omentum. The patient received medical treatment and reported gradual improvement in his laboratory results and CT findings.

Di Cesare, Ernesto; Di Sibio, Alessandra; Gennarelli, Antonio; Felli, Valentina; Vellucci, Valentina; Casazza, Ines; Masciocchi, Carlo

2014-01-01

4

Unusual imaging findings in Wilson's disease.  

PubMed

We present unusual imaging findings in the liver of a patient with Wilson's disease. On US, the liver contours were irregular and its echogenicity was increased with multiple, small hypo- and hyperechoic nodules. Prominent perihepatic fat layer was noted to be increased in thickness. On CT and MR, multiple, small, enhancing nodules were detected in the liver in the early arterial phase after administration of intravenous contrast material. Biopsy was consistent with chronic parenchymal liver pathology with dysplastic changes but without evidence of hepatocellular carcinoma. To our knowledge, dysplastic nodules enhancing at the arterial phase and thickened perihepatic fat layer have not been previously reported in patients with Wilson's disease. PMID:12522607

Akhan, Okan; Akpinar, Erhan; Oto, Aytekin; Köroglu, Mert; Ozmen, Mustafa N; Akata, Deniz; Bijan, Bijan

2002-12-01

5

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

6

[CT findings of pulmonary hypertension].  

PubMed

For the treatment for pulmonary hypertension (PH), the differential diagnosis of its causal diseases is essential. To determine whether X-ray CT is useful for differentiating PH, we reviewed CT findings of 53 patients (18 men and 35 women, mean age of 44.9) given a diagnosis of PH, consisting of 25 with primary pulmonary hypertension (PPH), 18 with chronic pulmonary embolism (cPE), 6 with Eisenmenger syndrome, 5 cases of collagen diseases, 2 of acute PE, and 1 of cor pulmonale. The intrapulmonary distribution of CT findings (ground glass opacity [GGO], mosaic attenuation, striation and/or infiltration, and interlobular septal thickening) were reviewed and scored on a 4-point scale (grade 0: no findings, 1: involving one third of the lung, 2: involving one-two thirds, and 3: diffuse distribution) by two radiologists who reached a consensus. PPH showed preferentially diffuse distribution of GGO as compared with cPE (p<0.05). However, there was no apparent relationship between the pulmonary vascular resistance and the distribution of GGO in PPH cases. The mosaic attenuation pattern was more frequent in cPE (43%) than PPH (12% ; p<0.05). Striation and/or infiltration was observed in 36% of cPE, but only 4% of PPH. Interlobular septal thickening was seen in 16% of PPH, and 0% in cPE. Evaluation of CT findings is useful to differentiate PH. PMID:16886804

Inoue, Yukio; Tanimoto, Akihiro; Sato, Toru; Kuribayashi, Sachio

2006-07-01

7

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

2013-01-01

8

Inflammatory pseudotumors of the spleen: CT and MRI findings  

SciTech Connect

Our goal was to etucidate the CT and MRI findings of inflammatory pseudotumors of the spleen. The CT and MRI findings of three patients with inflammatory pseudotumors of the spleen were reviewed and compared with the pathologic findings. On the early phase of CT, the masses were hypodense to the normal spleen, and on the delayed phase, they demonstrated delayed enhancement. On T1-weighted MR images, the masses were isointense to the normal spleen, and on T2-weighted images, the masses had heterogeneous low signal intensities. After administration of Gd-DTPA, the masses showed delayed enhancement. Inflammatory pseudotumors of the spleen were characterized by low signal intensity on T2-weighted MR images and delayed enhancement after contrast material administration on CT and MRI. The fibrous stroma may contribute to these unusual findings. 23 refs., 3 figs.

Irie, Hiroyuki; Honda, Hiroshi; Kaneko, Kuniyuki; Kuroiwa, Toshiro [Kyushu Univ., Fukuoka (Japan)] [and others] [Kyushu Univ., Fukuoka (Japan); and others

1996-03-01

9

Adrenal cortex dysfunction: CT findings  

SciTech Connect

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

Huebener, K.H.; Treugut, H.

1984-01-01

10

CT findings of bronchial transection  

Microsoft Academic Search

A case of right bronchial rupture demonstrated by computed tomography (CT) is reported. Chest radiographs of a 55-year-old man who sustained blunt chest trauma showed bilateral pneumomediastinum, hydropneumothorax, and subcutaneous emphysema with fracture of the left 3rd and 4th ribs. CT showed wall defect over the right main bronchus with the air in airway contiguous to that in the mediastinum.

Yung-Liang Wan; Kuei-Ton Tsai; Kee-Min Yeow; Chih-Feng Tan; Ho-Fai Wong

1997-01-01

11

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

12

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

13

CT and MR imaging of unusual locations of extra-adrenal paragangliomas (pheochromocytomas).  

PubMed

Our review was undertaken to describe CT and MRI features of unusual extra-adrenal paragangliomas (pheochromocytomas). We retrospectively reviewed CT and MRI findings in 29 patients with 39 extra-adrenal paragangliomas. For each tumour, site, size, MRI characteristics, CT appearances and enhancement after gadolinium and iohexol were recorded. There were 17 carotid body tumours, 1 mediastinal, 1 intra-cardiac, 15 retroperitoneal extra-adrenal paragangliomas, 2 bladder, 1 pelvic sidewall and 2 intra-spinal paragangliomas within the lumbo-sacral spine. All 39 paragangliomas were shown on MRI. Of the 32 lesions studied by MRI and CT, CT detected 30. Of the two lesions missed on CT, one was an intra-cardiac paraganglioma and the second a bladder wall paraganglioma. At detection, 25 tumours were larger than 4 cm, of which 20 were heterogeneous lesions on CT and MRI with variable contrast enhancement. The 14 smaller paragangliomas were smooth in contour and demonstrated avid, homogeneous contrast enhancement. Our review of extra-adrenal paragangliomas highlights their unusual sites and appearances. MRI demonstrated the greatest variability in the appearances of larger tumours, provided additional information compared to CT for surgical planning and is a useful screening tool for patients at high risk of extra-adrenal paragangliomas. PMID:15290072

Sahdev, Anju; Sohaib, A; Monson, John P; Grossman, Ashley B; Chew, Shern L; Reznek, Rodney H

2005-01-01

14

Perforated ileal diverticulitis: CT findings.  

PubMed

Diverticulosis of the ileum is very uncommon. The differential diagnosis for any inflammatory process in the right lower quadrant of the abdomen includes appendicitis, Crohn's disease, and other infectious and inflammatory conditions of the terminal ileum and cecum. Diagnosis of small bowel diverticulitis is based on radiological findings, and computed tomography is the method of choice to demonstrate mural changes and the mesenteric extent of the inflammation. Preoperative knowledge of this condition may influence surgical and medical management. PMID:18092289

Kirba?, Ismail; Yildirim, Erkan; Harman, Ali; Ba?aran, Ozgür

2007-12-01

15

Clinical and CT findings in appendiceal diverticulitis.  

PubMed

Appendiceal diverticulitis is a rare pathologic entity that is difficult to diagnose on clinical grounds because of an indolent course and atypical presenting symptoms. However, the characteristic computed tomographic (CT) features should suggest the correct diagnosis, and an appendectomy should be performed. Despite its rarity, radiologists should be aware of this condition and the findings on CT because of the higher risk of perforation than in appendicitis and the potential association with appendiceal neoplasms. PMID:24440390

Patil, Abhijit Y; Levine, Marc S; Grujic, Edina; Goren, Robert A

2014-01-01

16

Gastrointestinal stromal tumors: CT and MRI findings.  

PubMed

The objective of this study was to report the CT and MRI appearances of primary and metastatic gastrointestinal stromal tumor (GIST). The clinical and imaging findings of 31 patients with histological and immunohistochemical diagnosis of GIST were reviewed. The CT and MRI findings were assessed independently for size, location, enhancement characteristics, and pattern of metastatic disease. The tumors were of enteric (n=13), gastric (n=12), duodenal (n=2), and rectal (n=3) origin. In one case the primary site was the mesentery, without involvement of bowel. Primary tumors were typically exophytic (79%), larger than 5 cm (84%), and inhomogeneously enhancing (84%). Central necrosis of all tumors (37%) and aneurysmal dilation of enteric tumors (33%) were less common. Metastases were most commonly to mesentery (26%) or liver (32%). Less common findings were ascites (7%) and omental caking (3%). Liver metastases were hypervascular in 92% of patients and rapidly became cystic following therapy with imatinib mesylate (Gleevec; Novartis, East Hanover, NJ, USA). Lung metastases, bowel obstruction, vascular invasion, and significant lymphadenopathy were not seen in any patient. GISTs have some specific CT findings which could help differentiate them from other gastrointestinal tumors. Liver metastases became cystic following therapy, mimicking simple cysts. MRI was better than single-phase CT for assessing liver metastases, while CT was more sensitive for mesenteric metastases. PMID:15761716

Sandrasegaran, Kumaresan; Rajesh, Arumugam; Rushing, Daniel A; Rydberg, Jonas; Akisik, Fatih M; Henley, John D

2005-07-01

17

SAXually Explicit Images: Finding Unusual Shapes  

Microsoft Academic Search

Among the visual features of multimedia content, shape is of particular interest because humans can often recognize objects solely on the basis of shape. Over the past three decades, there has been a great deal of research on shape analysis, focusing mostly on shape indexing, clustering, and classification. In this work, we introduce the new problem of finding shape discords,

Li Wei; Eamonn J. Keogh; Xiaopeng Xi

2006-01-01

18

Motor-evoked potentials: unusual findings  

Microsoft Academic Search

Objective: The aims of this study were to present rare findings of motor evoked potentials (MEPs) in 3 patients with spastic paraparesis and to show that careful interpretation is indispensable in experiments done with very high intensity stimulation.Methods: The conduction along several segments of the descending tracts was studied by our previously published method in 3 patients with spastic paraparesis.Results:

Yoshikazu Ugawa; Ichiro Kanazawa

1999-01-01

19

Gastric xanthelasma: an unusual endoscopic finding.  

PubMed

Gastric xanthelasma is a rarely encountered finding in upper gastrointestinal (GI) endoscopy. It is characterised by yellowish-white plaque in the stomach especially in the antrum or the pyloric region. Histologically it consists of foamy macrophages in the lamina propria. It is a benign condition but its appearance mimics malignancy and it is found to be associated with various conditions, some of which are considered premalignant so, histological confirmation is necessary. We present a case of a 44-year-old man who presented to the medicine outpatient department for intermittent pain in epigastrium for the last 2 years. His physical examination was normal. His haematological and biochemical investigations were also normal. His upper GI endoscopy revealed yellowish-white plaque in fundus of the stomach, which was diagnosed as gastric xanthelasma by histological examination with associated chronic gastritis. PMID:24165503

Dhakal, Mona; Dhakal, O P; Bhandari, Dhurba; Gupta, Amlan

2013-01-01

20

Gallbladder Tuberculosis: CT Findings with Histopathologic Correlation  

PubMed Central

Objective We wanted to describe the computed tomography (CT) findings of gallbladder tuberculosis (TB) and to correlate them with pathologic findings. Materials and Methods There were seven patients (M:F = 3:4; mean age, 46.3 years; age range, 32 to 78 years) in whom gallbladder TB was eventually diagnosed. All of them underwent cross-sectional imaging with CT, a pathologic examination and a retrospective review. CT imaging evaluation was done in each case, including the findings of a mass versus nodule, wall thickening (uniform or irregular) and the enhancement patterns (homogeneous or heterogeneous). Results All the cases of gallbladder TB revealed the following three different CT findings: micronodular lesion of the gallbladder wall (n = 1), a thickened wall (n = 4) and a gallbladder mass (n = 2). There were three cases of homogeneous enhancement of the lesions, including homogeneous enhancement with nodular lesion, homogeneous uniform thickness enhancement and homogeneous thickness enhancement in one case each, and these cases pathology showed tuberculous granuloma with a little caseating necrosis in one case and tuberculous granuloma with rich fibrous tissue, but little or no evident caseating necrosis in two cases. Four cases of heterogeneous enhancement of the lesions, including heterogeneous uniform-thickness enhancement in two cases, heterogeneous enhancement with a local mass lesion in one case and heterogeneous enhancement with a mass that replaced the gallbladder in one case; in these cases, pathology showed tuberculous granuloma with marked caseation or liquefaction necrosis in three cases and tuberculous granuloma by fibrous and calcifications accompanied by caseating necrosis in one case. Among the seven cases of gallbladder TB, six cases were accompanied by abdominal extra-gallbladder TB, including abdominal lymph node TB in five cases and hepatic TB in four cases. Conclusion Gallbladder TB has various CT manifestations, and the enhanced CT findings are well matched with pathological features. An irregularly thickened gallbladder wall or a gallbladder wall mass with multiple-focus necrosis or calcifications accompanied by the typical CT findings of abdominal extra-gallbladder TB should suggest the diagnosis of gallbladder TB.

Xu, Xiu-Fang; Qiu, Ling-Ling; Shen, Jian; Dong, Fei; Chen, Ying

2011-01-01

21

Finding Unusual Medical Time-Series Subsequences: Algorithms and Applications  

Microsoft Academic Search

In this work, we introduce the new problem of finding time series discords. Time series discords are subsequences of longer time series that are maximally different to all the rest of the time series subsequences. They thus capture the sense of the most unusual subsequence within a time series. While discords have many uses for data mining, they are particularly

Eamonn J. Keogh; Jessica Lin; Ada Wai-chee Fu; Helga Van Herle

2006-01-01

22

Van der Woude syndrome with an unusual intraoral finding.  

PubMed

Orofacial manifestations of Van der Woude syndrome (VWS) include cleft lip or palate, lower lip pits, hypodontia, hypernasal voice, cleft or bifid uvula, syngnathia, narrow high arched palate, and ankyloglossia. Extraoral manifestations include limb anomalies, popliteal webs, accessory nipples, congenital heart defects, and Hirschsprung disease. We report an interesting case of VWS with characteristic orofacial features along with an unusual additional finding of fusion of primary mandibular left lateral incisor and canine in a 7-year-old boy. PMID:21525698

Sarode, Gargi S; Desai, Rajiv S; Sarode, Sachin C; Kulkarni, Meena A

2011-01-01

23

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

24

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

25

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

26

Focal osteolysis in total hip replacement: CT findings  

Microsoft Academic Search

ObjectiveTo describe the CT findings of focal osteolysis following total hip replacement (THR).Design and patientsCT imaging features of 30 THRs with focal osteolysis visualized on follow-up radiographs and undertaken revision surgery were reviewed. On CT scans, the shape and anatomic location of osteolytic lesions was recorded, as well as their size and number. The presence of cortical disruption or expansion,

Ji Seon Park; Kyung Nam Ryu; Hoon Pyo Hong; Yong Koo Park; Young Soo Chun; Myung Chul Yoo

2004-01-01

27

Isolated Cysticercal Infestation of Extraocular Muscles: CT and MR Findings  

Microsoft Academic Search

PURPOSE: We sought to document the appearance of isolated cysticercal infestation of single extraocular muscles on MR and CT studies, and to compare these findings with results of histopathologic examination. METHODS: Six MR and three CT examinations of the orbits of six patients were reviewed. Histopathologic confirmation of the diagnosis was available in three patients, and response to specific medical

Meher A. Ursekar; Darab K. Dastur; Daya K. Manghani; Atul T. Ursekar

28

The value of brain CT findings in acute methanol toxicity  

Microsoft Academic Search

ObjectiveDue to depressant effects of methanol on the central nervous system, brain computed tomography (CT) scan has been introduced as a diagnostic device in methanol intoxication. The authors aimed to present brain CT findings in patients with acute methanol intoxication and to determine signs associated with death.

Morteza Sanei Taheri; Hossein Hassanian Moghaddam; Yashar Moharamzad; Shahrzad Dadgari; Vahideh Nahvi

2010-01-01

29

Incidence of Acute Appendicitis in Patients with Equivocal CT Findings  

Microsoft Academic Search

OBJECTIVE. The purpose of our study was to determine the incidence of acute appendi- citis in patients for whom the CT interpretation is deemed equivocal. MATERIALS AND METHODS. Of 1,344 patients referred for CT with suspected ap- pendicitis between January 1998 and December 2002, 172 patients were identified in whom the radiographic findings were equivocal. Two radiologists reviewed the equivocal

Caroline P. Daly; Richard H. Cohan; Isaac R. Francis; Elaine M. Caoili; James H. Ellis; Bin Nan; Cohan RH; Francis IR; Ellis JH

30

PET/CT Findings in Acute Gastric Anisakiasis.  

PubMed

Acute gastric anisakiasis is caused by the consumption of raw or undercooked fish containing Anisakis larvae. Although several reports have demonstrated the CT features of acute gastric anisakiasis, little is known about the FDG PET/CT findings. We report a 59-year-old woman who underwent FDG PET/CT and was finally diagnosed as having acute gastric anisakiasis. The PET/CT demonstrated focal FDG accumulation in the fornix of the gastric wall and lymph nodes in the lesser curvature and paraaortic regions. PMID:24810783

Abe, Koichiro; Yoshikai, Tomonori; Baba, Shingo; Isoda, Takuro; Honda, Hiroshi

2014-06-01

31

Biliary cystadenoma and cystadenocarcinoma: CT and sonographic findings.  

PubMed

Biliary cystadenomas and cystadenocarcinomas are rare cystic neoplasms, usually intrahepatic in location, that are characterized pathologically by a multilocular appearance. We report the CT and sonographic findings in eight cases of biliary cystadenoma and three cases of biliary cystadenocarcinoma and correlate them with the surgical and pathologic findings. CT showed internal septa in eight of the 10 multiloculated lesions, whereas sonography showed septa in all five cases in which it was used. CT in two of the three cystadenocarcinomas showed thick and coarse mural and septal calcifications as well as large solid soft-tissue masses in one. CT showed mural soft-tissue nodules in the single case of a unilocular cystadenocarcinoma. Sonography and CT usually show the multilocular nature of biliary cystadenomas and cystadenocarcinomas. The presence of mural or septal nodules, discrete soft-tissue masses, and possibly thick and coarse calcifications increase the likelihood of a cystadenocarcinoma. PMID:2669463

Korobkin, M; Stephens, D H; Lee, J K; Stanley, R J; Fishman, E K; Francis, I R; Alpern, M B; Rynties, M

1989-09-01

32

"Eczema Coxsackium" and Unusual Cutaneous Findings in an Enterovirus Outbreak  

PubMed Central

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

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

2013-01-01

33

Unusual CT and MR Appearance of an Epidermoid Tumor of the Cerebellopontine Angle  

Microsoft Academic Search

Summary: We present a case of an unusual epidermoid tumor of the cerebellopontine angle that appeared hyper- dense on CT scans and hyperintense on T1- and T2- weighted MR images. We believe that these imaging char- acteristics were caused by a high protein concentration within the contents of the cyst.

Makoto Ochi; Kuniaki Hayashi; Tomayoshi Hayashi; Minoru Morikawa; Ayumi Ogino; Rashid Hashmi; Mitsuto Iwanaga; Akio Yasunaga; Shobu Shibata

1998-01-01

34

FDG PET/CT findings in rare sarcomas.  

PubMed

The role of FDG PET/CT in management of soft tissue and bone sarcomas has been described in many studies up-to-date. However, contribution of PET/CT to diagnosis and treatment in some types of sarcomas that are seen with low incidence has not been identified properly yet. Clear cell sarcoma, synovial sarcoma of chest and myxoid lyposarcoma are rare types of sarcomas. We aimed to describe the FDG uptake patterns of these rare tumors and find out the role of FDG PET/CT in management of disease. PMID:23352751

Ergül, N; Ayd?n, M

2013-01-01

35

Tumoral Calcinosis of the Temporomandibular Joint: CT and MR Findings  

Microsoft Academic Search

Summary: In this article, the CT, three-dimensional CT, and MR findings are reviewed in a 59-year-old woman with tumoral cal- cinosis involving the temporomandibular joint. Index term: Temporomandibular joint, neoplasms Tumoral calcinosis is an uncommon disease characterized by periarticular soft tissue hyper- plasia and calcification. Large joints such as the hip, shoulder, and elbow most frequently are involved. This entity

Kelly Sled; Orlando Ortiz; Mark Wax; Jerry Bouquot

36

Serial CT Findings of Paragonimus Infested Dogs and the Micro-CT Findings of the Worm Cysts  

PubMed Central

Objective To investigate the serial CT findings of Paragonimus westermani infected dogs and the microscopic structures of the worm cysts using Micro-CT. Materials and Methods This study was approved by the committee on animal research at our institution. Fifteen dogs infected with P. westermani underwent serial contrast-enhanced CT scans at pre-infection, after 10 days of infection, and monthly thereafter until six months for determining the radiologic-pathologic correlation. Three dogs (one dog each time) were sacrificed at 1, 3 and 6 months, respectively. After fixation of the lungs, both multi-detector CT and Micro-CT were performed for examining the worm cysts. Results The initial findings were pleural effusion and/or subpleural ground-glass opacities or linear opacities at day 10. At day 30, subpleural and peribronchial nodules appeared with hydropneumothorax and abdominal or chest wall air bubbles. Cavitary change and bronchial dilatation began to be seen on CT scan at day 30 and this was mostly seen together with mediastinal lymphadenopathy at day 60. Thereafter, subpleural ground-glass opacities and nodules with or without cavitary changes were persistently observed until day 180. After cavitary change of the nodules, the migratory features of the subpleural or peribronchial nodules were seen on all the serial CT scans. Micro-CT showed that the cyst wall contained dilated interconnected tubular structures, which had communications with the cavity and the adjacent distal bronchus. Conclusion The CT findings of paragonimiasis depend on the migratory stage of the worms. The worm cyst can have numerous interconnected tubular channels within its own wall and these channels have connections with the cavity and the adjacent distal bronchus.

Lee, Chang Hyun; Goo, Jin Mo; Lee, Hyun Ju; Hong, Sung-Tae; Shen, Cheng Hua; Chung, Doo Hyun; Son, Kyu Ri; Chang, Jung Min; Eo, Hong

2007-01-01

37

SPECT findings in an unusual case of visual hallucinosis  

Microsoft Academic Search

A 64-year-old right-handed man acutely developed elementary visual hallucinations (monochromatic, moving geometrical figures), visual illusions (distortion of the right side of faces) with achromatopsia and blurred vision restricted to the left visual hemi-field. CT of the brain before and after administration of contrast medium and a repeat examination 2 months later showed no abnormalities, while brain mapping (power analysis of

I. Hoksbergen; B. A. Pickut; P. Mariën; P. P. Deyn; H. Slabbynck; J. Kunnen

1996-01-01

38

Accessory cardiac bronchus and tracheal bronchus anomalies: CT-bronchoscopy and CT-bronchography findings  

Microsoft Academic Search

Most common developmental anomalies of bronchial tree include accessory cardiac bronchus (ACB) and tracheal bronchus (TB).\\u000a Minor bronchial anomalies include variants of TB, displaced segmental bronchi, and bronchial agenesis. We present CT-bronchoscopy\\u000a and CT-bronchography findings of three cases with either ACB or TB. Recognition of these anomalies is important, as associated\\u000a clinical complications, including recurrent episodes of infection, hemoptysis, and

Harun Yildiz; Sahin Ugurel; Kenan Soylu; Mustafa Tasar; Ibrahim Somuncu

2006-01-01

39

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

40

Intraperitoneal involvement in rhabdomyosarcoma CT findings in a child.  

PubMed

Intraperitoneal neoplastic involvement in rhabdomyosarcoma is rare and its incidence and imaging characteristics need to be further described. We present the computerized tomography (CT) findings of a case with pelvic rhabdomyosarcoma and intraperitoneal neoplastic involvement. Enhanced peritoneal and retroperitoneal masses were seen around the liver, spleen, in the paracolic gutters, and in the lesser sac without evidence of ascites, mesenteric nodules or omental caking. Our case also showed that absence of ascites does not preclude the presence of peritoneal involvement. Progression in the peritoneal disease was also well demonstrated by CT. PMID:11765167

Oto, A; Ba?gün, N; Kutluk, T; Eryilmaz, M; Oran, M; Besim, A

2001-01-01

41

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

42

CT of Globe Rupture: Analysis and Frequency of Findings.  

PubMed

OBJECTIVE. The objective of our study was to evaluate the CT characteristics of globe rupture. MATERIALS AND METHODS. The medical records of patients seen in the emergency department with blunt, penetrating, or explosive orbit injury were retrospectively reviewed. A total of 75 patients (76 injured globes) were included (56 males and 19 females; average age, 45.1 years; age range, 5-95 years). CT examinations were reviewed by two experienced radiologists without knowledge of ophthalmologic findings, original orbital CT images, or surgical outcomes. RESULTS. Of the 76 globe injuries, 33 (43%) were ruptured and 43 (57%) were nonruptured. There were significant differences between the ruptured and nonruptured globes with respect to intraocular hemorrhage, lens dislocation and destruction, an intraocular foreign body, intraocular gas, anterior chamber depth (ACD), and globe deformity and wall irregularity (p < 0.05). There was good interrater agreement between the two radiologists (kappa value range, 0.63-0.96). The average sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of CT for the detection of globe rupture based on readings by two radiologists were 76%, 85%, 80%, 82%, and 81%, respectively. CONCLUSION. Although CT is extremely useful in the evaluation of ocular trauma, it should not be solely relied on for the diagnosis of globe rupture because of the potentially catastrophic consequences of an undiagnosed injury. A difference in ACD can be diagnostic of globe rupture. PMID:24758666

Yuan, Wei-Hsin; Hsu, Hui-Chen; Cheng, Hui-Cheng; Guo, Wan-Yuo; Teng, Michael Mu-Huo; Chen, Shih-Jen; Lin, Tai-Chi

2014-05-01

43

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

44

Early CT findings of global central nervous system hypoperfusion  

SciTech Connect

The early computed tomographic (CT) findings of acute global central nervous system hypoperfusion were studied in 10 patients. The findings could be characterized as: (1) diffuse mass effect with effacement of the cerebral sulci and of the brainstem cisterns (nine patients); (2) global decrease in the cortical gray-matter density from edema, causing loss of the normal gray-white matter differentiation (six patients); (3) low-density lesions of the basal ganglia bilaterally (five patients); and (4) decreased gray-matter density in watershed distributions bilaterally (two patients). Subsequent contrast-enhanced scans in three of the 10 patients demonstrated selective enhancement of the cerebral cortex or the basal ganglia or both. The CT findings seen in this study predicted a poor outcome; nine of the 10 patients died from the insult. The abnormal CT findings can be ascribed to increased vulnerability of the cerebral cortex and basal ganglia to hypotensive episodes. This vulnerability is due to the large metabolic demand of these regions and their characteristic local cerebral blood flow.

Kjos, B.O.; Brant-Zawadzki, M.; Young, R.G.

1983-12-01

45

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

46

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

47

McKusick-Kaufman Syndrome: Atretic Upper Vaginal Pouch; an Unusual Urogenital MR Finding.  

PubMed

McKusick-Kaufman syndrome is a rare autosomal recessive disease diagnosed by polydactyly, hydrometrocolpos, and congenital heart disease. We present an unusual laparotomy confirmed urogenital MRI finding (atretic vaginal pouch) in a 3-month-old girl with McKusick-Kaufman syndrome. Up to our knowledge, this MR finding has not been reported in the literature yet. PMID:22470656

Mostafavi, Seyed-Hassan; Hooman, Nakysa; Hallaji, Farideh

2009-01-01

48

McKusick-Kaufman Syndrome: Atretic Upper Vaginal Pouch; an Unusual Urogenital MR Finding  

PubMed Central

McKusick-Kaufman syndrome is a rare autosomal recessive disease diagnosed by polydactyly, hydrometrocolpos, and congenital heart disease. We present an unusual laparotomy confirmed urogenital MRI finding (atretic vaginal pouch) in a 3-month-old girl with McKusick-Kaufman syndrome. Up to our knowledge, this MR finding has not been reported in the literature yet.

Mostafavi, Seyed-Hassan; Hooman, Nakysa; Hallaji, Farideh

2009-01-01

49

Granulomatous appendicitis presenting as right lower quadrant pain: CT findings  

Microsoft Academic Search

Background: We present the computed tomographic (CT) findings of granulomatous appendicitis.\\u000a \\u000a \\u000a \\u000a \\u000a Methods: Five of 652 (0.9%) patients who had undergone appendectomy for clinically suspected acute appendicitis over a 19-month period\\u000a proved to have granulomatous appendicitis. One patient had surgery based on a clinical diagnosis of acute appendicitis. Four\\u000a patients (three men and one woman; age range = 14–39 years) underwent

R. Zissin; G. Gayer; J. Bernheim; E. Kots; M. Shapiro-Feinberg; M. Hertz

2003-01-01

50

Melanotic Neuroectodermal Tumour of Infancy: CT and MR Findings  

PubMed Central

Melanotic neuroectodermal tumour of infancy (MNTI) is a rare neoplasm of neural crest origin. It is benign but locally aggressive and tends to occur most often during the first few months of life. It has a predilection for the head and neck region, particularly for the maxilla. Presence of melanin in this tumour is said to give it distinct clinicopathological, immunohistochemical, ultrastructural and imaging features [1]. We describe five further cases of MNTI, with an emphasis on computed tomography (CT) and magnetic resonance (MR) imaging findings, which have yet to be clearly described in the available radiological literature for this tumour.

Haque, Saira; McCarville, M Beth; Sabire, Neil; McHugh, Kieran

2012-01-01

51

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

PubMed Central

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

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

2013-01-01

52

Automatically Pairing Measured Findings across Narrative Abdomen CT Reports  

PubMed Central

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

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

2013-01-01

53

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

PubMed Central

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

2014-01-01

54

Pulmonary Coccidioidomycosis: Pictorial Review of Chest Radiographic and CT Findings.  

PubMed

Pulmonary coccidioidomycosis is a fungal disease endemic to the desert regions of the southwestern United States, Mexico, Central America, and South America. The incidence of reported disease increased substantially between 1998 and 2011, and the infection is encountered beyond the endemic areas because of a mobile society. The disease is caused by inhalation of spores of Coccidioides species. Individuals at high risk are those exposed to frequent soil aerosolization. The diagnosis is established by direct visualization of mature spherules by using special stains or cultures from biologic specimens. Serologic testing of anticoccidioidal antibodies is used for diagnosis and treatment monitoring. The infection is self-limited in 60% of cases. When the disease is symptomatic, the lung is the primary site of involvement. On the basis of clinical presentation and imaging abnormalities, pulmonary involvement is categorized into acute, disseminated, and chronic forms, each with a spectrum of imaging findings. In patients with acute disease, the most common findings are lobar or segmental consolidation, multifocal consolidation, and nodules. Adenopathy and pleural effusions are also seen, usually in association with parenchymal disease. Disseminated disease is rare and occurs in less than 1% of patients. Pulmonary findings are miliary nodules and confluent parenchymal opacities. Acute respiratory distress syndrome is an infrequent complication of disseminated disease. The acute findings resolve in most patients, with chronic changes developing in approximately 5% of patients. Manifestations of chronic disease include residual nodules, chronic cavities, persistent pneumonia with or without adenopathy, pleural effusion, and regressive changes. Unusual complications of chronic disease are mycetoma, abscess formation, and bronchopleural fistula. Patients in an immunocompromised state, those with diabetes mellitus, pregnant women, and those belonging to certain ethnic groups may show severe, progressive, or disseminated disease. ©RSNA, 2014. PMID:25019431

Jude, Cecilia M; Nayak, Nita B; Patel, Maitraya K; Deshmukh, Monica; Batra, Poonam

2014-01-01

55

Gingival fibromatosis with multiple unusual findings: report of a rare case  

PubMed Central

Gingival fibromatosis is a rare disease, especially its syndromic form. Here, we review the literatures on gingival fibromatosis and briefly summarize some characters on clinical, etiological, genetic and histopathological aspects. We also present a rare case of gingival fibromatosis with multiple unusual findings in a 21-year-old man. And we differentiate it from some well-known syndromes including gingival fibromatosis. Maybe it implies a new syndrome within the spectrum of those including gingival fibromatosis.

He, Long; Ping, Fei-Yun

2012-01-01

56

Indicative findings of pancreatic cancer in prediagnostic CT  

Microsoft Academic Search

We examined 20 prediagnostic CTs from 16 patients for whom the diagnosis of pancreatic cancer was delayed until full diagnostic\\u000a CT was performed. Three radiologists independently reviewed the prediagnostic CTs along with 50 CTs of control subjects, including\\u000a patients without pancreatic disease (n?=?38) or with chronic pancreatitis without calcification visible on CT (n?=?12). The reviewers recorded the presence of biliary

Sung Soo Ahn; Myeong-Jin Kim; Jin-Young Choi; Hye-Suk Hong; Yong Eun Chung; Joon Seok Lim

2009-01-01

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

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

Microsoft Academic Search

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

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

59

CT imaging findings of a calcifying epithelial odontogenic tumour.  

PubMed

We report a case of calcifying epithelial odontogenic tumour (CEOT), also known as a Pindborg tumour, with local aggressive behaviour. CT imaging showed a large expansile bone-forming lesion in the mandible, which showed the exact extent and nature of the lesion. We briefly discuss the imaging features of CEOT and the relevant literature. PMID:22190756

Venkateswarlu, M; Geetha, P; Lakshmi Kavitha, N

2012-01-01

60

Malignant peritoneal mesothelioma: Marked variability of CT findings  

Microsoft Academic Search

Three pathologically proven cases of malignant peritoneal mesothelioma (MPM) are shown with markedly different computed tomographic (CT) appearances. The first presented as a large enhancing pancreatic mass, a second with diffuse solid large intraperitoneal masses enveloping bowel and mesentery, and a third with predominance of ascites and small peritoneal nodules. In only one patient was there a history of possible

T. R. Smith

1994-01-01

61

Non-severe pulmonary embolism: prognostic CT findings.  

PubMed

The goal of this study was to retrospectively evaluate CT cardiovascular parameters and pulmonary artery clot load score as predictors of 3-month mortality in patients with clinically non-severe pulmonary embolism (PE). We included 226 CT positive for PE in hemodynamically stable patients (112 women; mean age 67.1 years ± 16.9). CT were independently reviewed by two observers. Results were compared with occurrence of death within 3 months using Cox regression. Twenty-four (10.6%) patients died, for whom 9 were considered to be due to PE. Interobserver agreement was moderate for the shape of interventricular septum (? = 0.41), and for the ratio between the diameters of right and left ventricle (RV/LV) (? = 0.76). Observers found no association between interventricular septum shape and death. A RV/LV diameter ratio >1 was predictive of death (OR, 3.83; p < 0.01) only when we also took into account the value of the embolic burden (< 40%). In a multivariate model, CT cardiovascular parameters were not associated with death. Concomitant lower limb DVT and comorbid conditions were important predictors of death. In clinically non-severe PE, a RV/LV diameter ratio >1 is predictive of death when the embolic burden is low (< 40%). PMID:20403673

Moroni, Anne-Line; Bosson, Jean-Luc; Hohn, Noélie; Carpentier, Françoise; Pernod, Gilles; Ferretti, Gilbert R

2011-09-01

62

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

PubMed

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. PMID:23986840

Nørgaard, Pernille; Hagen, Casper Petri; Hove, Hanne; Dunø, Morten; Nissen, Kamilla Rothe; Kreiborg, Sven; Jørgensen, Finn Stener

2012-01-01

63

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

64

CT Findings of Patients with Small Bowel Obstruction due to Bezoar: A Descriptive Study  

PubMed Central

Purpose. The aim of this study was to present the computed tomography (CT) findings of bezoars that cause obstruction in the small bowel and to emphasize that some CT findings can be considered specific to some bezoar types. Materials and Methods. The records of 39 patients who underwent preoperative abdominal CT and subsequent operation with a diagnosis of intestinal obstruction due to bezoars were retrospectively analyzed. Results. In total, 56 bezoars were surgically removed from 39 patients. Bezoars were most commonly located in the jejunum (n = 26/56, 46.4%). Sixteen (41.0%) patients had multiple bezoar locations in the gastrointestinal tract. Common CT findings in all patients were a mottled gas pattern and a focal ovoid or round intraluminal mass with regular margins and a heterogeneous internal structure. Furthermore, some CT findings were determined to be specific to bezoars caused by persimmons. Conclusions. Preoperative CT is valuable in patients admitted with signs of intestinal obstruction in geographic regions with a high bezoar prevalence. We believe that the correct diagnosis of bezoars and the identification of their number and location provide a great advantage for all physicians and surgeons. In addition, some types of bezoars have unique CT findings, and we believe that these findings may help to establish a diagnosis.

Altintoprak, Fatih; Degirmenci, Bumin; Dikicier, Enis; Cakmak, Guner; Kivilcim, Taner; Akbulut, Gokhan; Dilek, Osman Nuri; Gunduz, Yasemin

2013-01-01

65

Painless, atraumatic, isolated lateral compartment syndrome of the leg: an unusual triad of atypical findings.  

PubMed

Compartment syndrome can be a devastating complication with significant morbidity when not recognized or treated expediently. Among the classic pentad of signs and symptoms associated with compartment syndrome, pain that is out of proportion to the injury is often cited as the earliest and most sensitive. We present a case report of an atypical presentation of compartment syndrome of the leg in which a patient taking lithium for bipolar disorder did not report pain out of proportion to the injury mechanism. Lithium has been implicated in altering pain perception and increasing the tolerance and threshold for pain, but this has not been widely reported in the orthopedic literature. In addition to compartment syndrome that was painless, the patient presented with 2 additional atypical findings. She presented with compartment syndrome that was atraumatic and isolated to only 1 out of the 4 compartments of the leg. A compartment syndrome that is painless, atraumatic, and isolated to a single compartment represents an unusual triad of atypical findings that has not been previously reported. With unusual presentations of compartment syndrome, there is an increased risk of late or unrecognized diagnosis, consequently increasing the likelihood of significant nerve damage or muscle necrosis. Clinicians have historically applied a higher level of scrutiny to patients who were deemed "obtunded," that is, those in whom an assessment of pain cannot be reliably determined. In the past, obtunded patients have included intubated or comatose patients, infants and children, mentally disabled patients, and patients with altered mental status, nerve injury, or distracting injuries. Based on evidence from the psychiatry and anesthesia literatures, we propose that patients taking lithium should be added to this list of "obtunded" patients in whom a reliable assessment of pain may not be possible. PMID:20305839

Oh, Luke S; Lewis, Paul B; Prasarn, Mark L; Lorich, Dean G; Helfet, David L

2010-01-01

66

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

PubMed Central

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

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

2013-01-01

67

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

PubMed Central

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

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

2014-01-01

68

Comparison between computed tomography (CT) and autopsy findings in cases of abdominal injury and disease  

Microsoft Academic Search

We report 10 autopsy cases involving fatal pathological changes in abdominal organs, for which findings of computed tomography (CT) on admission or after death were compared with autopsy findings. Two of the cases were death due to natural causes and eight were death due to traffic accidents. From the findings at autopsy, the causes of death were considered to be

Kentaro Yamazaki; Seiji Shiotani; Noriyoshi Ohashi; Mikio Doi; Kazunori Kikuchi; Chigusa Nagata; Katsuya Honda

2006-01-01

69

CT and MR Imaging Findings in Cerebral Toxocaral Disease  

Microsoft Academic Search

Summary: We report serial MR findings in a 54-year-old woman with eosinophilic meningoencephalitis due to Tox- ocara canis infection, a parasitic disease contracted through exposure with soil contaminated by the eggs of the roundworm. MR imaging revealed several enhancing sub- cortical and white matter lesions in both lobes. Antihelmin- thic chemotherapy yielded marked improvement of the neurologic deficits and cerebral

E. Xinou; A. Lefkopoulos; M. Gelagoti; A. Drevelegas; A. Diakou; I. Milonas; A. S. Dimitriadis

70

Traumatic aortic injury: CT findings, mimics, and therapeutic options  

PubMed Central

Objective Traumatic aortic injury (TAI) is rare, but frequently lethal. However, with prompt diagnosis, patients can undergo life-saving open or endovascular repair. Unfortunately, because these injuries are relatively rare, subtle forms of these injuries may be missed, and normal variants may mimic TAI leading to misdiagnosis. Conclusions We will discuss computed tomography findings of typical injury patterns of traumatic aortic injuries as well as treatment options, diagnostic pitfalls and injury mimics. These are highlighted with clinical case examples.

Lantz, Eric J.; Johnson, C. Michael; Young, Philip M.

2014-01-01

71

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

72

CT and MR findings in a neuroforaminal extraskeletal Ewing sarcoma mimicking benign nerve sheath tumor  

Microsoft Academic Search

Introduction  We report the CT and MR findings in a 30-year-old man with extraskeletal Ewing sarcoma (EES) involving the left neural foramen\\u000a at L5–S1 level.\\u000a \\u000a \\u000a \\u000a \\u000a Materials and methods  The patient was evaluated with preoperative lumbosacral CT and MR imaging and postoperative lumbosacral MR imaging.\\u000a \\u000a \\u000a \\u000a Results   The lesion was hyperdense on CT, isointense on T1- and T2-weighted MR images, and enhanced homogeneously after

S. Avcu; H. N. Özcan; M. ?zmirli; M. Lemmerling

73

CT, MR, and Angiography Findings of a Solitary Fibrous Tumor of the Larynx: a Case Report  

PubMed Central

This report details the CT, MR, and angiography findings of a solitary fibrous tumor involving the larynx of a 34-year-old man. A precontrast CT scan revealed a well-defined isodense mass in the submucosal region of the supraglottic larynx. The tumor appeared as a mixed intensity lesion on the T1- and T2-weighted MR images. A T2-weighted MR image showed a central, round, and low signal intensity area within the mass. For both the CT and MR images, the mass demonstrated heterogeneous enhancement following the administration of contrast material. The angiography showed a hypervascular tumor with heterogeneous persistent staining.

Yoon, Dae Young; Choi, Chul Soon; Yun, Eun Joo; Seo, Young Lan; Nam, Eun Suk

2008-01-01

74

An Unusual Orbital Localization of Wegener Granulomatosis Detected by 18F-FDG PET/CT.  

PubMed

We report a case of a 61-year-old male patient affected by Wegener granulomatosis and left exophthalmos who underwent F-FDG PET/CT during follow-up for rectal cancer. The study was negative for secondary lesions but revealed high uptake at the left orbital mass consistent with Wegener granulomatosis. PMID:23856831

Bertagna, Francesco; Treglia, Giorgio; Rossini, Pierluigi; Giubbini, Raffaele

2014-08-01

75

Ovarian and tubal torsion: imaging findings on US, CT, and MRI.  

PubMed

Accurate diagnosis of adnexal torsion is often challenging, as clinical presentation is nonspecific and the differential for pelvic pain is broad. However, prompt diagnosis and treatment is critical to good clinical outcomes and preservation of the ovary and/or fallopian tube. Ultrasound (US) imaging is most frequently used to assess torsion. However, as computed tomography (CT) utilization in the emergency setting has increased, there are times when CT is the initial imaging test. Additionally, the nonspecific clinical presentation may initially be interpreted as gastrointestinal in etiology, where CT is the preferred exam. For these reasons, it is imperative to know the findings of adnexal torsion on CT as well as US. Magnetic resonance imaging (MRI) is helpful in cases where the diagnosis remains unclear and is particularly helpful in the young or pregnant patient with equivocal sonographic findings, as it provides excellent soft tissue contrast without ionizing radiation. This article will illustrate the findings of surgically confirmed ovarian and fallopian tube torsion on US, CT, and MRI, including those in the pregnant patient. Ovarian enlargement, adnexal mass, twisting of the vascular pedicle, edematous and heterogeneous appearance of the ovary, peripheral ovarian follicles, free fluid, uterine deviation towards the side of torsion, adnexal fat stranding, tubal dilatation, and decreased adnexal enhancement will be reviewed. Familiarity with the range of imaging findings across multiple modalities is key to improving the likelihood of timely diagnosis and therefore improved clinical outcomes. PMID:24078282

Lourenco, Ana P; Swenson, David; Tubbs, Robert J; Lazarus, Elizabeth

2014-04-01

76

Chest CT screening of asbestos-exposed workers: lung lesions and incidental findings.  

PubMed

The objective of the present study is to determine the feasibility of chest computed tomography (CT) in screening for lung cancer among asbestos-exposed workers. In total, 633 workers were included in the present study and were examined with chest radiography and high-resolution CT (HRCT). A total of 180 current and ex-smokers (cessation within the previous 10 yrs) were also screened with spiral CT. Noncalcified lung nodules were considered positive findings. The incidental CT findings not related to asbestos exposure were registered and further examined when needed. Noncalcified lung nodules were detected in 86 workers. Five histologically confirmed lung cancers were found. Only one of the five cancers was also detected by plain chest radiography and three were from the group of patients with a pre-estimated lower cancer probability. Two lung cancers were stage Ia and were radically operated. In total, 277 individuals presented 343 incidental findings of which 46 required further examination. Four of these were regarded as clinically important. In conclusion, computed tomography and high-resolution computed tomography proved to be superior to plain radiography in detecting lung cancer in asbestos-exposed workers with many confounding chest findings. The numerous incidental findings are a major concern for future screenings, which should be considered for asbestos-exposed ex-smokers and current smokers. PMID:17050560

Vierikko, T; Järvenpää, R; Autti, T; Oksa, P; Huuskonen, M; Kaleva, S; Laurikka, J; Kajander, S; Paakkola, K; Saarelainen, S; Salomaa, E-R; Tossavainen, A; Tukiainen, P; Uitti, J; Vehmas, T

2007-01-01

77

Peritoneal lymphomatosis: CT and PET/CT findings and how to differentiate between carcinomatosis and sarcomatosis.  

PubMed

Peritoneal lymphomatosis is a rare manifestation of lymphoma, seen most frequently with non-Hodgkin lymphoma, and it is important to be familiar with this condition, because early diagnosis directly affects the management of patients. This review illustrates the spectrum of imaging findings in peritoneal lymphomatosis, highlighting the use of positron emission tomography/computed tomography, showing common and uncommon subtypes of lymphoma associated with this entity, and how to differentiate it from peritoneal carcinomatosis and peritoneal sarcomatosis. PMID:23598428

Cabral, Fernanda C; Krajewski, Katherine M; Kim, Kyung Won; Ramaiya, Nikhil H; Jagannathan, Jyothi P

2013-01-01

78

Peritoneal lymphomatosis: CT and PET/CT findings and how to differentiate between carcinomatosis and sarcomatosis  

PubMed Central

Abstract Peritoneal lymphomatosis is a rare manifestation of lymphoma, seen most frequently with non-Hodgkin lymphoma, and it is important to be familiar with this condition, because early diagnosis directly affects the management of patients. This review illustrates the spectrum of imaging findings in peritoneal lymphomatosis, highlighting the use of positron emission tomography/computed tomography, showing common and uncommon subtypes of lymphoma associated with this entity, and how to differentiate it from peritoneal carcinomatosis and peritoneal sarcomatosis.

Krajewski, Katherine M.; Kim, Kyung Won; Ramaiya, Nikhil H.; Jagannathan, Jyothi P.

2013-01-01

79

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

PubMed Central

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

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

2005-01-01

80

Comparison of Preoperative Temporal Bone CT with Intraoperative Findings in Patients with Cholesteatoma  

PubMed Central

Introduction: Cholesteatoma is traditionally diagnosed by otoscopic examination and treated by surgery. The necessity for imaging in an uncomplicated case is controversial. This study was planned to investigate the usefulness of a preoperative high-resolution computed tomography (HRCT) scan in depicting the status of middle ear structures in the presence of cholesteatoma and also to compare the correspondence between pre- and intraoperative CT findings in patients with cholesteatoma. Materials and Methods: This prospective descriptive study was performed from January 2009 to May 2011 in 36 patients with cholesteatoma who were referred to the Kashani and Al-Zahra Clinics of Otolaryngology. Preoperative high-resolution temporal bone CT scans (axial and coronal views) were carried out and compared with intraoperative findings. Results: Evaluation of 36 patients and their CT scans revealed excellent correlation for sigmoid plate erosion, widening of aditus, and erosion of scutum; good correlation for erosion of malleus and tegmen; moderate correlation for lateral canal fistula (LCF) and erosion of mastoid air cells; and poor correlation for facial nerve dehiscence (FND), incus, and stapes erosion. Conclusion: A preoperative CT scan may be helpful in relation to diagnosis and decision making for surgery in cases of cholesteatoma and ossicular erosion. The CT scan can accurately predict the extent of disease and is helpful for detection of lateral canal fistula, erosions of dural plate, and ossicular erosions. However it is not able to distinguish between cholesteatoma and mucosal disease, facial nerve dehiscency, incus, and stapes erosion.

Rogha, Mehrdad; Hashemi, Sayyed Mostafa; Mokhtarinejad, Farhad; Eshaghian, Afrooz; Dadgostar, Alireza

2014-01-01

81

Non-specific interstitial pneumonia: findings on sequential CT scans of nine patients  

PubMed Central

BACKGROUND—The purpose of this study was to describe findings on sequential high resolution computed tomographic (CT) scans of nine patients with non-specific interstitial pneumonia.?METHODS—Thin section CT scans of nine patients with pathologically proven non-specific interstitial pneumonia were evaluated retrospectively. All patients underwent sequential CT scanning (mean follow up 3.1 years (range 1-8)).?RESULTS—The predominant finding on the initial CT scans in seven patients was patchy areas of ground glass opacity in both the central and peripheral lung, with (n = 5) or without (n = 2) irregular areas of consolidation. In another two patients areas of consolidation in both the central and peripheral lung were seen as the predominant abnormality. The initial parenchymal abnormalities had resolved completely in four patients with predominant ground glass opacity without bronchiolectasis. Some of the bronchiectasis and bronchiolectasis resolved. In two patients bronchiectasis and bronchiolectasis occurred at one year and two years of follow up, respectively. In two patients with predominant consolidation the consolidation decreased but persisted, and in one patient the consolidation evolved into honeycombing. In the other patient bronchiectasis progressed over the course of seven years, forming varicoid bronchiectasis.?CONCLUSION—Patients with non-specific interstitial pneumonia may recover completely after treatment with corticosteroids, but as many as half of these patients will have persistent pulmonary abnormalities on CT scans including bronchiectasis and honeycomb lung.??

Akira, M.; Inoue, G.; Yamamoto, S.; Sakatani, M.

2000-01-01

82

Spinal aneurysmal bone cyst causing acute cord compression without vertebral collapse: CT and MRI findings  

Microsoft Academic Search

Aneurysmal bone cyst (ABC) of the spine can cause acute spinal cord compression in young patients. We report the CT and MRI findings in a histology-proven case of spinal ABC presenting with sudden paraplegia. Typical features of a spinal ABC at the thoracic level with considerable extension into the posterior epidural space and cord compression were demonstrated. Special note was

Monica S. M. Chan; Yiu-Chung Wong; Ming-Keung Yuen; Dicky Lam

2002-01-01

83

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

84

SPECT/CT evaluation of unusual physiologic radioiodine biodistributions: pearls and pitfalls in image interpretation.  

PubMed

Radioiodine imaging has a well-established role in depicting metastatic disease after thyroidectomy in patients with well-differentiated thyroid cancer. Uptake of radioiodine in thyroid metastases depends on expression of sodium-iodide symporter (NIS) by tumor tissues. However, because radioiodine may also accumulate in normal structures and tissues, it is important to distinguish physiologic radioiodine activity from metastatic disease. Furthermore, secretions that contain radioiodine may also simulate pathologic uptake. A spectrum of physiologic distributions, normal variants, and benign mimics of disease have been described in the literature; yet, even when armed with a comprehensive knowledge of these patterns, interpreting radiologists and nuclear physicians may still encounter diagnostic uncertainty. Single-photon emission computed tomography (SPECT) with integrated computed tomography (CT) is a novel technology that, when applied to diagnostic iodine 123 or iodine 131 ((131)I) radioiodine scintigraphy, may accurately localize and help distinguish benign mimics of disease, with the potential to alter the management plan. SPECT/CT is increasingly being used with radioiodine scintigraphy to evaluate patients with thyroid cancer and shows promise for improving imaging specificity and reducing false-positive results. PMID:23479704

Glazer, Daniel I; Brown, Richard K J; Wong, Ka Kit; Savas, Hatice; Gross, Milton D; Avram, Anca M

2013-01-01

85

Mechanisms of injury and CT findings in bowel and mesenteric trauma.  

PubMed

Bowel and mesenteric injuries are relatively uncommon but associated with significant morbidity and mortality. Early recognition is crucial, and multidetector computed tomography (MDCT) now has a central role in the evaluation of patients with a history of trauma. In this review, we describe the MDCT appearances of bowel and mesenteric injuries with reference to findings at surgery. Emphasis is placed on the importance of an understanding of mechanism of injury when interpreting CT findings following abdominal trauma. PMID:24606835

Khan, I; Bew, D; Elias, D A; Lewis, D; Meacock, L M

2014-06-01

86

Pacemaker stimulus amplitude alteration without loss of capture: an unusual ECG finding in cardiac tamponade from pacemaker lead perforation.  

PubMed

A variation in pacemaker stimulus amplitude can represent pacemaker system dysfunction from generator malfunction, lead insulation defect, lead fracture, or artefact of digital signal processing of the electrocardiography recorder. Pacemaker lead perforation into the pericardial space typically results in loss of capture which was not demonstrated in our patient. In summary, we report an unusual ECG finding of pacemaker stimulus amplitude alteration without loss of capture in the setting of cardiac tamponade from pacemaker lead perforation. PMID:23830112

Suksaranjit, P; Prasidthrathsint, K

2014-01-01

87

Unusual findings on studying surfactant solutions: displacing solvatochromic pyridinium N-phenolate towards outlying areas of rod-like micelles?  

Microsoft Academic Search

During studies of colloidal surfactants solutions by means of acid\\/base and solvatochromic indicators an unusual finding was observed. The properties of micelles of cetyl trimethylammonium bromide (CTAB) and N-cetyl pyridinium bromide (CPB), modified by introducing various organic anions (altogether 24 anions), were examined by means of 4-(2,4,6-triphenylpyridinium-1-yl)-2,6-diphenylphenolate, used to establish the empirical ET(30) solvent polarity scale, at working concentrations of

Nikolay O. Mchedlov-Petrossyan; Natalya A. Vodolazkaya; Christian Reichardt

2002-01-01

88

Spectrum and detection of musculoskeletal findings on trauma-related CT torso examinations.  

PubMed

This study aims (1) to evaluate the spectrum of musculoskeletal (MSK) findings detected on trauma-related torso CT exams performed in the emergency department and (2) to identify the findings of high clinical importance that are underreported. Following IRB approval, two fellowship-trained MSK radiologists independently reviewed 200 consecutive trauma CT torso examinations performed at a level 1 trauma center, focusing on MSK findings. Discrepancies were resolved by consensus. Findings were categorized as of high, moderate, or low clinical importance based on criteria established with an orthopedic trauma surgeon. Findings evident on only one series (scout, axial, or sagittal/coronal reformations) were documented. The consensus reading was compared to the final report. Unreported findings of high clinical importance were entered into our departmental QA system. Eighty-two percent (164/200) of the studies had at least one MSK finding. There were 433 total findings of varying importance and the overall detection rate was 61 % (266/433). The detection rate for high importance findings was 80 % (177/221) with the majority representing acute fractures (99 %). For findings of high clinical importance, the lowest detection rates were for fractures of the sternum, proximal humerus, and forearm. Of the high severity findings, 6.3 % (14/221) were detected only on sagittal or coronal reformatted or scout images. Twenty percent of musculoskeletal findings of high clinical importance on trauma-related CT torso exams were not reported. Fractures of the sternum, proximal humerus, and forearm were the most commonly missed fractures and review of scout and multiplanar reformations can increase detection. PMID:24557456

Kung, Justin W; Wu, Jim S; Shetty, Sanjay K; Khasgiwala, Vhaibhav C; Appleton, Paul; Hochman, Mary G

2014-08-01

89

CT imaging findings and endovascular management of isolated spontaneous dissecting aneurysm of celiac artery  

PubMed Central

Isolated spontaneous dissecting aneurysm of celiac artery without concomitant involvement of aorta is a rare entity and only a few cases are reported in the literature. More cases are being detected recently with greater advancements in CT technology. Clinicians and emergency physicians should be aware of this condition and should include it in the differential diagnosis of patients who present with refractory postprandial epigastric pain, particularly in middle-aged men. We present a case of a 45-year-old male with isolated spontaneous dissecting celiac artery aneurysm, with special emphasis on CT findings and the role of endovascular management.

Rama Krishnan, RS; Murali, K; Madan, R; Francis, G

2013-01-01

90

Limitations in the CT Diagnosis of Acute Diverticulitis: Comparison of CT, Contrast Enema, and Pathologic Findings in 16 Patients  

Microsoft Academic Search

Pitfalls in CT diagnosis of acute diverticuhitis were investigated in 16 patients with the disease who had misleading or equivocal CT features. The CT appearance was corre- hated with contrast enemas (13 cases) and with surgical assessment and pathologic evaluation of resected specimens (12 cases). Limitations in the CT diagnosis were related to (1) marked thickening of the colonic wall,

Emil J. Balthazar; Alec Megibow; Roger A. Schinella; Richard Gordon

91

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

SciTech Connect

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

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

2007-06-15

92

Differentiation Between Mucus Secretion and Endoluminal Tumors in the Airway: Analysis and Comparison of CT Findings.  

PubMed

OBJECTIVE. The objective of our study was to suggest CT features that help differentiate transient mucus secretion from airway tumors in the evaluation of soft-tissue nodular lesions confined within the airway lumen. MATERIALS AND METHODS. Forty-two patients with airway tumors (mean age, 57.6 ± 14.9 [SD] years) and 48 patients with secretion (mean age, 67.8 ± 13.4 years) were included. Two observers analyzed the following features on contrast-enhanced CT in consensus readings: shape (round, ovoid, lobulating, or complex); margin (circumscribed or uncircumscribed); size (including change in size between mediastinal and lung window images); location (anterior, posterior, or unclear); angle between the lesion and contacting airway wall (acute, obtuse, or unclear); attenuation (quantitative and qualitative analyses); and presence of air, fat, or calcification within the lesion. The positive predictive value (PPV) of each CT finding was calculated for secretion and tumor, respectively. RESULTS. Round (90.0%) or lobulating (92.9%) shape, uncircumscribed margin (100.0%), unclear location (87.5%), unclear angle (87.5%), a CT number of 21.7 HU or more (91.7%), and internal features such as fat (100.0%) or calcification (100.0%) showed high PPVs for tumors. Complex shape (100.0%), change in size of more than 15.9% (96.8%), a CT number of less than 21.7 HU (83.3%), and internal air density (100.0%) showed high PPVs for secretion. CONCLUSION. On contrast-enhanced CT, the evaluation of shape, change in size between mediastinal and lung window images, the measurement of CT number, and internal features such as air, fat, or calcification might help differentiate secretion from tumors. PMID:24758650

Hong, Sae Rom; Lee, Yeo Jin; Hong, Yoo Jin; Hur, Jin; Kim, Young Jin; Choi, Byoung Wook; Lee, Hye-Jeong

2014-05-01

93

Orbital positron emission tomography/computed tomography (PET/CT) imaging findings in graves ophthalmopathy  

PubMed Central

Background We aimed to describe orbital positron emission tomography/computed tomography (PET/CT) imaging findings, both structural and metabolic, in different clinical stages of Graves ophthalmopathy (GO). This prospective, observational, cross-sectional study examined 32 eyes of 16 patients with GO. Methods Patients were assessed with a complete ophthalmological evaluation and assigned a VISA classification for GO. All patients underwent serum thyroid hormone measurement, antibody profile, and 18-fluorodeoxyglucose positron emission tomography/computed tomography (18-FDG PET/CT) of the orbits. The 18-FDG uptake on PET images was expressed in terms of maximum standard uptake value (SUVmax). CT images were analyzed, and orbital structures were measured in millimeters. Vision, inflammation, strabismus, and overall appearance were assessed according to the VISA classification system, thyroid hormone levels, antibody values, 18-FDG uptake, and thickness of orbital structures. Results Altogether, 32 eyes of 16 patients (10 women, 6 men; mean age 44.31?±?13 years, range 20–71 years) were included. Three patients were hypothyroid, seven were euthyroid, and six were hyperthyroid. CT measurements of extraocular muscle diameter were elevated (P?CT (R2?=?0.0755, P?>?0.05). Conclusions We demonstrated a lack of correlation between 18-FDG extraocular muscle uptake and either clinical inflammation score or muscle diameter. Although 18-FDG uptake has been used as an inflammation marker in other pathologies, inflammation in GO may be clinically detected in PET/CT-negative cases, and cases with negative clinical findings may show inflammation on PET/CT. Clinical evaluation is mandatory but may be insufficient and inaccurate for classifying GO. A larger and homogeneous sample size and further research is needed to define the role of PET/CT in detecting, grading, and follow-up of GO to optimize treatment of the inflammatory stage respect clinical methods currently used.

2013-01-01

94

CT-findings in haemorrhages from aneurysms of the anterior communicating artery: Correlation with angiography and clinical course  

Microsoft Academic Search

Summary CT findings, angiography and clinical course were analyzed in a series of 31 patients with a recent subarachnoid haemorrhage (SAH) from an aneurysm of the anterior communicating artery (ACoAA). It is shown that 3 types of bleedings can be distinguished according to the CT findings. In thefirst group (52%), suffering a mild or moderate bleeding into the basal cisterns

P. Stoeter; H.-J. Reulen; U. Groeger

1987-01-01

95

Clinical, histopathological and mineralogical analysis findings of an unusual case of pneumoconiosis.  

PubMed

A 43-year-old man with a long history of dyspnea which had progressively worsened over the preceding month is presented. He had worked in an antimony mine for 3 years. Radiologically, there were diffuse reticulonodular shadowing opacities in both lung parenchymas. Histopathologic examination of the open-lung biopsy specimen revealed alveolar spaces filled with dust-laden macrophages and amorphous proteinaceous semifluid, the latter being immunoreactive for Human Surfactant Apoprotein A, associated with marked interstitial accumulation of the similar-looking macrophages along the bronchovascular bundles and mild interstitial fibrosis. Silicotic nodules or mixed dust fibrosis were not seen. The patient was diagnosed as silicoproteinosis with unusual histopathological features because he had worked in an antimony mine for only 3 years and had 86% silica in a mineralogical analysis. Pneumoconiosis is a rare lung disease which may be confused with other interstitial lung diseases. Clinical, radiological and unusual histopathologic features of this rare case are presented and discussed with the differential diagnosis, especially of mixed dust pneumoconiosis. PMID:22627642

Kefel?, Mehmet; Akpolat, Ilkser; Zeren, Handan; Atici, Atilla Güven; Dumortier, Pascal; Honma, Koichi; Can, Bilge

2012-01-01

96

Comparison of CT and MRI findings in the differentiation of acute from chronic cholecystitis.  

PubMed

We compared individual computed tomography (CT) and MRI findings in differentiating acute from chronic cholecystitis. Thirty-seven patients undergoing both studies before cholecystectomy were included. Two radiologists (R1/R2) independently assessed all cases. For detecting acute cholecystitis, MRI showed better sensitivity (R1) using gallbladder wall thickening, accuracy (R1) and sensitivity (R1) using gallstones, sensitivity (R1 and R2) and accuracy (R2) using gallbladder wall hyperemia, accuracy (R1 and R2) using gallbladder wall defect, and accuracy (R2) using adjacent liver hyperemia (P=.004-.063). MRI also showed better specificity (R2) using pericholecystic fat stranding (P=.016). Overall, several findings showed better sensitivity and/or accuracy for acute cholecystitis on MRI than CT. PMID:23541278

Kaura, Samantha H; Haghighi, Mohammad; Matza, Brent W; Hajdu, Cristina H; Rosenkrantz, Andrew B

2013-01-01

97

Abnormal Ocular Enhancement in Sturge-Weber Syndrome: Correlation of Ocular MR and CT Findings with Clinical and Intracranial Imaging Findings  

Microsoft Academic Search

PURPOSE: To estimate the prevalence of abnormal ocular enhancement in children with Sturge- Weber syndrome as detected with MR imaging and CT and to correlate this with the clinical, fundoscopic, and intracranial imaging findings. METHODS: Fifteen children, 4 years old or younger, with Sturge-Weber syndrome were examined with enhanced CT and MR imaging. Eleven children had unilateral intracranial involvement and

Paul D. Griffiths; Mitra B. Boodram; Susan Blaser; Filiberto Altomare; J. Raymond Buncic; Alex V. Levin; Venita Jay; Derek Armstrong; Derek Harwood-Nash

98

CT and MR Imaging Findings of Lymphangioleiomyomatosis Involving the Uterus and Pelvic Cavity  

PubMed Central

Lymphangioleiomyomatosis (LAM) is a rare idiopathic disease and this is characterized by a proliferation of abnormal smooth muscle cells in the lungs and in the lymphatic system of the thorax and retroperitoneum. The female genital tract is rarely affected by LAM. We report here on the CT and MR imaging findings of extensive LAM involving the uterus and pelvic cavity, and this was seen as multiple cystic uterine and parauterine masses with internal hemorrhage in a young female with tuberous sclerosis complex.

Kim, You Sung; Byun, Jae Young; Lee, Ahwon; Park, Jong Sup

2011-01-01

99

Unusual histological findings after partial pancreaticoduodenectomy including benign multicystic mesothelioma, adenomyoma of the ampulla of Vater, and undifferentiated carcinoma, sarcomatoid variant: a case series  

Microsoft Academic Search

INTRODUCTION: The standard operation for carcinoma of the pancreatic head is a partial pancreaticoduodenectomy. Unusual histological findings may occasionally occur in the surgical specimen. We present three unusual histologic diagnoses after pancreaticoduodenectomy. CASE PRESENTATIONS: In the first case, an 86-year-old Caucasian woman was admitted with abdominal pain and nausea. Preoperative evaluation showed a 3 cm cystic lesion in the head

Nadja Lehwald; Kenko Cupisti; Stephan E Baldus; Patric Kröpil; Jan Schulte am Esch; Claus F Eisenberger; Wolfram T Knoefel

2010-01-01

100

Intraoperative Bleeding in Stereotactic Biopsies and Its Implication on Postoperative Management: Can We Predict CT Findings?  

PubMed

Background: Stereotactic biopsies are procedures with a high diagnostic yield and a low but serious risk of hemorrhage. Postoperative management remains controversial. Objectives: To evaluate the predictive value of intraoperative bleeding and its implication on postoperative management. Methods: Cases of intraoperative bleeding were prospectively documented in a consecutive series comprising 303 patients. Categories were as follows: no bleeding, single drop, ?10 drops and >10 drops. Incidence, size of hemorrhage and neurological deterioration were noted. Hemorrhage on routine postoperative CT scans was correlated with intraoperative findings, sample size, location and pathology. Results: A total of 93 patients (30.7%) showed intraoperative bleeding and 68 (22.4%) showed blood on postoperative CT. In 13 patients (4.3%) the diameter was >1 cm; 19 patients (6.3%) experienced neurological worsening, 9 (3.0%) having postoperative hemorrhage and 3 (1.0%) permanent neurological deficits. Bleeding was associated with postoperative hemorrhage (p < 0.0001). The negative predictive values to rule out any postoperative hemorrhage or hemorrhages >1 cm were 92 and 100%, respectively. Number of samples, location and pathology had no significant influence on postoperative hemorrhage. Conclusion: Stereotactic biopsies have a low risk of symptomatic hemorrhages. Intraoperative bleeding is a surveillance parameter of hemorrhage on CT. Therefore, routine postoperative CT may be restricted to patients who show intraoperative bleeding. © 2014 S. Karger AG, Basel. PMID:24481033

Eibach, Sebastian; Weise, Lutz; Setzer, Matthias; Seifert, Volker; Senft, Christian

2014-01-01

101

Benign nocturnal alternating hemiplegia of childhood: a new case with unusual findings.  

PubMed

It has been described a neuro developmental disorder labelled "Benign nocturnal alternating hemiplegia of childhood" (BNAHC) characterized by recurrent attacks of nocturnal hemiplegia without progression to neurological or intellectual impairment. We report a female patient who at 11months revealed a motionless left arm, unusual crying without impairment of consciousness and obvious precipitating factors. The attacks occur during sleep in the early morning with lack of ictal and interictal electroencephalographic abnormalities, progressive neurological deficit, and cognitive impairment. Unlike previous reports of BNAHC our patient come from a family with a history of both migraine, hemiplegic migraine, and sleep disorders. Our study remarks on the typical features described in previous studies and stresses the uncommon aspects that could help to identify the disorder which is likely to have been underestimated. Despite some clinical similarities between BNAHC and familiar hemiplegic migraine and alternating hemiplegia of childhood, the genetic analyses of our patient did not reveal genetic mutations found in both disorders. PMID:23820111

Mangano, Salvatore; Fontana, Antonina; Spitaleri, Chiara; Mangano, Giuseppa Renata

2014-05-01

102

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

103

CT Findings of Gallbladder Metastases: Emphasis on Differences According to Primary Tumors  

PubMed Central

Objective To describe computed tomography (CT) features of metastatic gallbladder (GB) tumors (MGTs) from various primary tumors and to determine whether there are differential imaging features of MGTs according to different primary tumors. Materials and Methods Twenty-one patients who had pathologically confirmed MGTs and underwent CT were retrospectively enrolled. Clinical findings including presenting symptoms, type of surgery, and interval between primary and metastatic tumors were recorded. Histologic features of primary tumor and MGTs including depth of invasion were also reviewed. Imaging findings were analyzed for the location and morphology of MGTs, pattern and degree of enhancement, depth of invasion, presence of intact overlying mucosa, and concordance between imaging features of primary and metastatic tumors. Significant differences between the histologies of MGTs and imaging features were determined. Results The most common primary tumor metastasized to the GB was gastric cancer (n = 8), followed by renal cell carcinoma (n = 4) and hepatocellular carcinoma (n = 3). All MGTs (n = 21) manifested as infiltrative wall thickenings (n = 15) or as polypoid lesions (n = 6) on CT, similar to the features of primary GB cancers. There were significant differences in the morphology of MGTs, enhancement pattern, enhancement degree, and depth of invasion according to the histology of primary tumors (p < 0.05). Metastatic adenocarcinomas of the GB manifested as infiltrative and persistently enhancing wall thickenings, while non-adenocarcinomatous metastases usually manifested as polypoid lesions with early wash-in and wash-out. Conclusion Although CT findings of MGTs are similar to those of primary GB cancer, they are significantly different between the various histologies of primary tumors.

Choi, Won Seok; Lee, Eun Sun; Lee, Kyoung-Bun; Yoon, Won Jae; Shin, Cheong-Il; Han, Joon Koo

2014-01-01

104

Managing incidental findings on abdominal and pelvic CT and MRI, part 1: white paper of the ACR Incidental Findings Committee II on adnexal findings.  

PubMed

This white paper describes adnexal (ovarian and paraovarian) incidental findings found on CT and MRI in nonpregnant postmenarchal patients in whom no adnexal disorder is clinically known or suspected. This represents the first 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. Recommendations for the management of incidental adnexal findings are organized into 4 main categories: benign-appearing cysts, probably benign cysts, adnexal masses with characteristic features, and all other adnexal masses, with pathways on the basis of patient menstrual status or age (when last menstrual period is unknown). A table and flowchart are provided for reference. PMID:24007607

Patel, Maitray D; Ascher, Susan M; Paspulati, Raj Mohan; Shanbhogue, Alampady K; Siegelman, Evan S; Stein, Marjorie W; Berland, Lincoln L

2013-09-01

105

Fat-forming variant of solitary fibrous tumour of the pleura: CT findings  

PubMed Central

The fat-forming variant of solitary fibrous tumour (SFT) was previously called lipomatous haemangiopericytoma and is a rare variant of solitary fibrous tumour. It predominantly occurs in the deep soft tissues of the retroperitoneum and thigh. Only a handful of cases involving the perineum, spine, thoracic wall and pelvic cavity have been reported in the radiological literature and the fat-forming variant of SFT involving the pleura has not been previously reported. Herein, we report the CT findings of a case of the fat-forming variant of SFT involving the pleura that was treated by excision. Chest CT showed a large lobulated heterogeneous fatty mass with a multifocal enhancing soft-tissue component in the left lower hemithorax. Although rare, the fat-forming variant of SFT of the pleura should be added to the differential diagnosis of fat-containing pleural soft-tissue tumours.

Park, C Y; Rho, J Y; Yoo, S M; Jung, H K

2011-01-01

106

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

PubMed Central

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

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

2013-01-01

107

Aortic Valve Calcification as an Incidental Finding at CT of the Elderly: Severity and Location as Predictors of Aortic Stenosis  

Microsoft Academic Search

OBJECTIVE. The purpose of this study was to correlate the severity and location of aortic valve calcifications, as an incidental finding at chest CT of elderly persons, with pressure gra- dients across the valve. MATERIALS AND METHODS. One hundred fifteen subjects who were 60 years old or older and who showed aortic valve calcification on chest CT (5-mm reconstructed section

Franklin Liu; Courtney A. Coursey; Cairistine Grahame-Clarke; Robert R. Sciacca; Anna Rozenshtein; Shunichi Homma; John H. M. Austin

108

CT colonography interpretation times: effect of reader experience, fatigue, and scan findings in a multi-centre setting  

Microsoft Academic Search

Our purpose was to assess the effect of reader experience, fatigue, and scan findings on interpretation time for CT colonography. Nine radiologists (experienced in CT colonography); nine radiologists and ten technicians (both groups trained using 50 validated examinations) read 40 cases (50% abnormal) under controlled conditions. Individual interpretation times for each case were recorded, and differences between groups determined. Multi-level

David Burling; Steve Halligan; Douglas G. Altman; Wendy Atkin; Clive Bartram; Helen Fenlon; Andrea Laghi; Jaap Stoker; Stuart Taylor; Roger Frost; Guido Dessey; Melinda De Villiers; Jasper Florie; Shane Foley; Lesley Honeyfield; Riccardo Iannaccone; Teresa Gallo; Clive Kay; Philippe Lefere; Andrew Lowe; Filipo Mangiapane; Jesse Marrannes; Emmanuele Neri; Giulia Nieddu; David Nicholson; Alan O’Hare; Sante Ori; Benedetta Politi; Martin Poulus; Daniele Regge; Lisa Renaut; Velauthan Rudralingham; Saverio Signoretta; Paola Vagli; Victor Van der Hulst; Jane Williams-Butt

2006-01-01

109

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

110

Syndrome of the mesencephalic artery: report of a case with CT and necropsy findings.  

PubMed Central

The syndrome of the mesencephalic artery refers to the clinical constellation of akinetic mutism and third nerve palsy which results from occlusion of one or more of the posterior thalamo-perforating arteries that arise from the proximal posterior cerebral artery. A patient with this syndrome is described in whom a bilateral paramedian midbrain infarct was shown by computed tomography and confirmed pathologically. To our knowledge, this is only the second reported case of mesencephalic infarct shown by computed tomography and the first in which the CT findings have been corroborated by pathological examination. Images

Hochman, M S; Sowers, J J; Bruce-Gregorios, J

1985-01-01

111

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

PubMed

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

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

2013-01-01

112

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

PubMed

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

Zheng, Xingju; Tan, Xianzheng; Wu, Bing

2014-02-01

113

Unusual fibroepithelial polyp in renal pelvis  

Microsoft Academic Search

We report a case in which a fibroepithelial polyp of the renal pelvis showed unusual radiological features. The growth of\\u000a the fibroepithelial polyp over a period of 11 months was noticed. Curvilinear surface calcifications and strong enhancement\\u000a on multiphasic enhanced CT and MR images were noticeable findings.

Young Hun Choi; Sun Ho Kim; Jeong Yeon Cho; Seung Hyup Kim

2008-01-01

114

CT findings of the nose and paranasal sinuses in chromium intoxication.  

PubMed

We performed computed tomography (CT) of the nose and paranasal sinuses in 21 patients with chromium induced septal perforation or thinning. Twenty patients showed various magnitudes of septal perforation. Twelve of 20 had perforation at the mid portion of the cartilaginous nasal septum. One patient had a sheet-like thinning of septal cartilage. Sixteen patients had mucosal thinning of the nasal conchas. In most cases, unilateral involvement of the inferior concha was seen. Eleven of 21 cases showed paranasal sinus mucosal thickening and one patient had a cyst or polyp in the sinus cavity. The main finding was nodular thickening of mucosa. Septal perforation by inhalation of chromic acid was located in the cartilaginous septum and there was no destruction of the bony septum and wall of the sinuses. PMID:2588668

Kim, M J; Lee, J D; Choi, H S; Kim, D I; Chung, T S; Suh, J H; Roh, J H

1989-09-01

115

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

116

Efficacy of conventional whole-body 18 F-FDG PET\\/CT in the incidental findings of parotid masses  

Microsoft Academic Search

Objective  The objective of this study was to evaluate the incidence of incidental parotid masses with conventional whole-body 18F-deoxyglucose (FDG) PET\\/CT and assess the ability of PET\\/CT to characterize these unexpected parotid lesions.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Fifty eight incidental findings of parotid masses with routine FDG PET\\/CT whole-body scan were reviewed in this retrospective\\u000a analysis, which were selected from the patients without any known

Hui-Chun Wang; Chuan-Tao Zuo; Feng-Chun Hua; Zhe-Min Huang; Hai-Bo Tan; Jun Zhao; Yi-Hui Guan

2010-01-01

117

An Immunoglobulin G4-Related Sclerosing Disease of the Small Bowel: CT and Small Bowel Series Findings  

PubMed Central

Immunoglobulin G4 (IgG4)-related sclerosing disease is rare and is known to involve various organs. We present a case of histologically proven IgG4-related sclerosing disease of the small bowel with imaging findings on computed tomography (CT) and small bowel series. CT showed irregular wall thickening, loss of mural stratification and aneurysmal dilatation of the distal ileum. Small bowel series showed aneurysmal dilatations, interloop adhesion with traction and abrupt angulation.

Ko, Younghwan; Kim, Jeong Won; Hong, Hye Sook; Yang, Ik; Lee, Yul; Hwang, Daehyun; Min, Seon Jeong

2013-01-01

118

An immunoglobulin G4-related sclerosing disease of the small bowel: CT and small bowel series findings.  

PubMed

Immunoglobulin G4 (IgG4)-related sclerosing disease is rare and is known to involve various organs. We present a case of histologically proven IgG4-related sclerosing disease of the small bowel with imaging findings on computed tomography (CT) and small bowel series. CT showed irregular wall thickening, loss of mural stratification and aneurysmal dilatation of the distal ileum. Small bowel series showed aneurysmal dilatations, interloop adhesion with traction and abrupt angulation. PMID:24043971

Ko, Younghwan; Woo, Ji Young; Kim, Jeong Won; Hong, Hye Sook; Yang, Ik; Lee, Yul; Hwang, Daehyun; Min, Seon Jeong

2013-01-01

119

Pulmonary embolism: CT findings with the use of helical computed tomography  

PubMed Central

Aim. The aim of this study is the presentation of the imaging findings in patients with pulmonary embolism, the diagnosis of which was made with the use of helical computed tomography. Material and Methods. The lung CT scans of 14 patients were retrospectively studied. The presence of hypoattenuating thrombus within the lumen of one or more pulmonary arterial branches was considered as the imaging criterion for the diagnosis of pulmonary embolism. Resalts. Emboli within the lumen of 1st order branches were found in 2 patients, within the lumen of 2nd order branches in 8 patients, into the lumen of 3rd order branches (lobar) in 10 patients and into the lumen of 4th order branches (segmental) in 6 patients. No emboli were detected in subsegmental or more peripheral branches. Concomitant, secondary findings were the presence of unilateral pleural effusion, areas of pulmonary oligaemia and the presence of a wedge-shaped, pleural-based opacity, indicative of a pulmonary infarct. Conclusion. In conclusion, we were able to make the diagnosis of pulmonary embolism through the direct visualization of intraluminal emboli up until the segmental level, as well as of concomitant, accessory findings of pulmonary embolism.

Grollios, G; Kazantzidou, Ir; Georgopoulou, V; Karakozoglou, Th; Kotoula, A; Michailidou, G; Kourou, E; Georgitziki, K

2006-01-01

120

A Case of Jugular Foramen Chordoma with Extension to the Neck: CT and MR Findings  

Microsoft Academic Search

We describe a case of jugular foramen chordoma with extracranial extension into the carotid, parapharyngeal, and perivertebral spaces through the jugular foramen. Although this type of extension is unusual, the differential diagnosis of head and neck tumors includes unusual extention of chordoma as well as extention of meningioma and neurinoma from the posterior skull base.

Takashi Itoh; Motoko Harada; Tamaki Ichikawa; Kazuhiro Shimoyamada; Nobuhito Katayama; Yoshihiko Tsukune

121

A case of jugular foramen chordoma with extension to the neck: CT and MR findings.  

PubMed

We describe a case of jugular foramen chordoma with extracranial extension into the carotid, parapharyngeal, and perivertebral spaces through the jugular foramen. Although this type of extension is unusual, the differential diagnosis of head and neck tumors includes unusual extension of chordoma as well as extension of meningioma and neurinoma from the posterior skull base. PMID:10852658

Itoh, T; Harada, M; Ichikawa, T; Shimoyamada, K; Katayama, N; Tsukune, Y

2000-01-01

122

Pulmonary Metastases at Diagnosis of Neuroblastoma in Pediatric Patients: CT Findings and Prognosis  

Microsoft Academic Search

OBJECTIVE . We undertook this study to determine the frequency, CT appearance, and clinical implications of the rare occurrence of pulmonary metastases among children present- ing with neuroblastoma. MATERIALS AND METHODS . A search of the Children's Cancer Group database re- vealed 21 of 567 children with reported lung metastases at original diagnosis of neuroblastoma. CT examinations available for 17

Bamidele F. Kammen; Katherine K. Matthay; Preeyacha Pacharn; Robert Gerbing; Robert C. Brasch; Charles A. Gooding

123

Dermoids of the Eustachian Tube: CT and MR Findings with Histologic Correlation  

Microsoft Academic Search

Summary: Two patients with congenital dermoids of the eusta- chian tube presented with recurrent otitis media and chronic otorrhea resistant to antimicrobial therapy. CT demonstrated fat density, homogeneous lesions, filling and expanding the eusta- chian tube. On MR, signal from the lesions was consistent with fat, and the relationship with the internal carotid artery was better delineated than by CT.

Spyros S. Kollias; William S. Ball; Erin C. Prenger; Charles M. Myers

124

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

Microsoft Academic Search

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

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

125

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

2013-01-01

126

Unusual widespread metastatic subcutaneous lesions in a patient with ileal carcinoid evidenced by 68Ga-DOTATOC PET/CT.  

PubMed

68Ga-DOTATOC PET/CT has been widely validated in diagnosis and follow-up of carcinoid. A 47-year-old woman with ileal carcinoid underwent a 68Ga-DOTATOC PET/CT for restaging purposes. Images showed extensive liver involvement and also a widespread metastatic subcutaneous metastases in the right chest wall and in the right laterocervical region. The presence of multiple soft-tissue metastases, as described in our case and imaged with 68Ga-DOTATOC, represents a very rare clinical entity. PMID:24561684

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

2014-04-01

127

High-Resolution CT Findings of Re-Expansion Pulmonary Edema  

PubMed Central

Objective To describe the high-resolution CT (HRCT) findings of re-expansion pulmonary edema (REPE) following a thoracentesis for a spontaneous pneumothorax. Materials and Methods HRCT scans from 43 patients who developed REPE immediately after a thoracentesis for treatment of pneumothorax were retrospectively analyzed. The study group consisted of 41 men and two women with a mean age of 34 years. The average time interval between insertion of the drainage tube and HRCT was 8.5 hours (range, 1-24 hours). The patterns and distribution of the lung lesions were analyzed and were assigned one of the following classifications: consolidation, ground-glass opacity (GGO), intralobular interstitial thickening, interlobular septal thickening, thickening of bronchovascular bundles, and nodules. The presence of pleural effusion and contralateral lung involvement was also assessed. Results Patchy areas of GGO were observed in all 43 patients examined. Consolidation was noted in 22 patients (51%). The geographic distribution of GGO and consolidation was noted in 25 patients (58%). Interlobular septal thickening and intralobular interstitial thickening was noted in 28 patients (65%), respectively. Bronchovascular bundle thickening was seen in 13 patients (30%), whereas ill-defined centrilobular GGO nodules were observed in five patients (12%). The lesions were predominantly peripheral in 38 patients (88%). Of these lesions, gravity-dependent distribution was noted in 23 cases (53%). Bilateral lung involvement was noted in four patients (9%), and a small amount of pleural effusion was seen in seven patients (16%). Conclusion The HRCT findings of REPE were peripheral patchy areas of GGO that were frequently combined with consolidation as well as interlobular septal and intralobular interstitial thickening.

Baik, Jun Hyun; Park, Young Ha; Park, Seog Hee

2010-01-01

128

An automatic technique for finding and localizing externally attached markers in CT and MR volume images of the head  

Microsoft Academic Search

An image processing technique is presented for finding and localizing the centroids of cylindrical markers externally attached to the human head in computed tomography (CT) and magnetic resonance (MR) image volumes. The centroids can be used as control points for image registration. The technique, which is fast, automatic, and knowledge-based, has two major steps. First, it searches the entire image

Matthew Y. Wang; J. M. Fitzpatrick; R. J. Maciunas

1996-01-01

129

Impact of FDG-PET/CT on Radiotherapy Volume Delineation in Non-Small-Cell Lung Cancer and Correlation of Imaging Stage With Pathologic Findings  

SciTech Connect

Purpose: Fluorodeoxyglucose-positron emission tomography (FDG-PET)/computed tomography (CT) is more accurate than CT in determining the extent of non-small-cell lung cancer. We performed a study to evaluate the impact of FDG-PET/CT on the radiotherapy volume delineation compared with CT without using any mathematical algorithm and to correlate the findings with the pathologic examination findings. Methods and Materials: A total of 32 patients with proven non-small-cell lung cancer, pathologic specimens from the mediastinum and lung primary, and pretreatment chest CT and FDG-PET/CT scans were studied. For each patient, two data sets of theoretical gross tumor volumes were contoured. One set was determined using the chest CT only, and the second, done separately, was based on the co-registered FDG-PET/CT data. The disease stage of each patient was determined using the TNM staging system for three data sets: the CT scan only, FDG-PET/CT scan, and pathologic findings. Results: Pathologic examination altered the CT-determined stage in 22 (69%) of 32 patients and the PET-determined stage in 16 (50%) of 32 patients. The most significant alterations were related to the N stage. PET altered the TNM stage in 15 (44%) of 32 patients compared with CT alone, but only 7 of these 15 alterations were confirmed by the pathologic findings. With respect to contouring the tumor volume for radiotherapy, PET altered the contour in 18 (56%) of 32 cases compared with CT alone. Conclusion: The contour of the tumor volume of non-small-cell lung cancer patients with co-registered FDG-PET/CT resulted in >50% alterations compared with CT targeting, findings similar to those of other publications. However, the significance of this change is unknown. Furthermore, pathologic examination showed that PET is not always accurate and histologic examination should be obtained to confirm the findings of PET whenever possible.

Faria, Sergio L. [Department of Radiation Oncology, McGill University Health Centre, Montreal, QC (Canada)], E-mail: sergio.faria@muhc.mcgill.ca; Menard, Sonia [Department of Radiation Oncology, McGill University Health Centre, Montreal, QC (Canada); Devic, Slobodan [Department of Medical Physics, McGill University Health Centre, Montreal, QC (Canada); Sirois, Christian [Department of Surgery, McGill University Health Centre, Montreal, QC (Canada); Souhami, Luis [Department of Radiation Oncology, McGill University Health Centre, Montreal, QC (Canada); Lisbona, Robert [Department of Nuclear Medicine, McGill University Health Centre, Montreal, QC (Canada); Freeman, Carolyn R. [Department of Radiation Oncology, McGill University Health Centre, Montreal, QC (Canada)

2008-03-15

130

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

PubMed Central

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.

Dournes, Gael; Laurent, Francois

2012-01-01

131

Umbilical metastatic deposit from recurrent cholangiocarcinoma: F18-FDG PET-CT findings.  

PubMed

A 69-year-old woman was diagnosed with stage IIIA advanced Type IV Klatskin cholangiocarcinoma, which was treated with radical choledochectomy, extended right hepatectomy and left hepaticojejunostomy. About six months after surgery, she presented with painless jaundice. A 2-18F-fluoro-2-deoxy-D-glucose positron emission tomography-computed tomography (F18-FDG PET-CT) was performed, which detected an FDG-avid umbilical metastatic nodule. We describe the F18-FDG PET-CT features of umbilical metastatic nodule in recurrent cholangiocarcinoma. It is sometimes difficult to detect the lesions when they present with non-specific soft tissue thickening on routine CT imaging. F18-FDG PET-CT would probably render these lesions easier to detect and interpret. PMID:22173264

Tan, M L; Padhy, A K

2011-11-01

132

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] [Univ. of Genoa (Italy); and others

1996-01-01

133

Spinal Cord Injuries With Normal Postmortem CT Findings: A Pitfall of Virtual Autopsy for Detecting Traumatic Death.  

PubMed

OBJECTIVE. The purpose of this study was to assess the incidence of spinal cord injuries without radiographic abnormalities (SCIWORA) on postmortem MDCT studies and to characterize this entity in detail. MATERIALS AND METHODS. Data from consecutive autopsies from October 2009 through December 2012 were searched, yielding 30 cases of cervical spinal cord injuries. Two board-certified radiologists interpreted postmortem MDCT images acquired before autopsy. Cases with normal findings were defined as SCIWORA. RESULTS. Postmortem MDCT images in 6 of 30 cases (20%; 95% CI, 8-39%) met SCIWORA criteria. In all these cases, traumatic death was not apparent before CT, the highest injury level was below C3, and fractures were not identified at autopsy. All subjects had occult disk injuries and perivertebral hemorrhage. Potentially fatal CT-detectable injuries to other parts of the body were not seen in five of six SCIWORA cases. CONCLUSION. A substantial proportion of fatal spinal cord injuries are without radiographic abnormalities at CT. Forensic radiologists and other interpreters of postmortem MDCT images must be aware of this entity to avoid excluding spinal cord injuries solely on the basis of postmortem MDCT findings. Special care is necessary in cases of unknown circumstances of death without abnormal CT findings. MRI may be used for further examination in the future, but until then, MDCT cannot replace autopsy for detecting SCIWORA. PMID:25055254

Makino, Yohsuke; Yokota, Hajime; Hayakawa, Mutsumi; Yajima, Daisuke; Inokuchi, Go; Nakatani, Eiji; Iwase, Hirotaro

2014-08-01

134

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

135

Incidental finding of the nutcracker phenomenon detected by 18F-FDG PET/CT.  

PubMed

A 46-year-old man was found to have an increased carcinoembryonic antigen level (25.7 ?g/L) during physical examination, and an (18)F-FDG PET/CT scan was subsequently performed. The PET image indicated abnormal radioactivity levels in the left kidney, and the coregistered CT revealed compression of the left renal vein between the aorta and superior mesenteric artery. An ultrasonography was then performed, which revealed that the ratio between the renal hilum and the aortomesenteric left renal vein was 3.2. Therefore, the nutcracker phenomenon was diagnosed. When abnormal radioactivity is found in the left kidney on PET/CT scanning, the nutcracker syndrome should be considered. PMID:23354041

Yin, Hongyan; Zhao, Jinhua; Du, Lianfang

2013-03-01

136

Ossifying renal tumor of infancy: findings at ultrasound, CT and MRI.  

PubMed

A 4-month-old boy presented with persistent gross hematuria. At ultrasonography, a 3.5-cm echogenic mass with posterior shadowing and tumor vascularity was detected within the right renal pelvis. Precontrast CT showed a slightly hyperattenuating mass in the renal pelvis. At MRI the mass was heterogeneously hypointense on T2-weighted images and isointense on T1-weighted images. Contrast-enhanced CT and MRI both revealed peripheral enhancement of the mass. A histological diagnosis of ossifying renal tumor of infancy was made after open pyelostomy and tumor enucleation. We suggest that ossifying renal tumor of infancy should be considered when a mass with posterior acoustic shadowing and tumor vascularity on US, hyperattenuation on precontrast CT and hypointensity on T2-weighted MRI is seen within the renal pelvis of an infant with hematuria. PMID:24407230

Lee, Sang Hwan; Choi, Young Hun; Kim, Woo Sun; Cheon, Jung-Eun; Moon, Kyung Chul

2014-05-01

137

A Case of Sarcoidosis with Unusual Radiographic Findings that Developed 5 Years after Silicone Augmentation Mammoplasty Complicated by Miliary Tuberculosis during Corticosteroid Treatment  

PubMed Central

A 54-year-old woman with a past history of silicone augmentation mammoplasty was admitted with fever and dyspnea with diffuse interstitial shadows on computed tomography (CT). Although radiological findings were atypical, we diagnosed sarcoidosis by laboratory, microbiological, and bronchoalveolar lavage fluid analysis. Corticosteroids ameliorated the condition, but she had recurrent of fever and CT revealed miliary nodules while interstitial shadows disappeared. Liver biopsy showed that noncaseating granuloma and Ziehl-Neelsen stain was positive. We diagnosed miliary tuberculosis which developed during corticosteroid therapy. Antituberculotic therapy resulted in favorable outcome. Possibility exists that onset of sarcoidosis was induced by mammoplasty, namely, human adjuvant disease.

Miyashita, Tomoko; Yoshioka, Katsunobu; Nakamura, Tomoyuki; Yamagami, Keiko

2011-01-01

138

Perforations of the rectosigmoid colon induced by cleansing enema: CT findings in 14 patients  

Microsoft Academic Search

Background: We report the computed tomographic (CT) features of colorectal perforations caused by cleansing enema.\\u000a \\u000a \\u000a \\u000a \\u000a Methods: We reviewed the medical records and CT studies of all patients with colorectal perforations caused by a cleansing enema.\\u000a \\u000a \\u000a \\u000a \\u000a Results: Fourteen patients (10 men, four women; average age = 80 years) were included in the study. The most common presenting symptoms\\u000a were severe abdominal

G. Gayer; R. Zissin; S. Apter; A. Oscadchy; M. Hertz

2002-01-01

139

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

140

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

141

Study Finds Small Increase in Cancer Risk after Childhood CT Scans  

Cancer.gov

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

142

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

Cancer.gov

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

143

Do High-Resolution CT Findings of Usual Interstitial Pneumonitis Obviate Lung Biopsy?  

Microsoft Academic Search

Background: High-resolution CT (HRCT) of the lungs has become an essential component to evaluate patients with diffuse lung disease. Little is known, however, about the current practices of pulmonologists caring for patients with these complex conditions, and, in particular, whether HRCT can obviate the need for surgical lung biopsy. Objectives: To investigate the practices of pulmonologists concerning the acceptability of

Gregory B. Diette; John C. Scatarige; Edward F. Haponik; Barry Merriman; Elliot K. Fishman

2005-01-01

144

Characteristic findings of hepatocellular carcinoma: An evaluation with comparative study of US, CT, and MRI  

Microsoft Academic Search

The sensitivity, specificity, and accuracy of ultrasonography (US), dynamic incremented computed tomography (CT) with delayed phase imaging, and magnetic resonance imaging (MRI) with or without Gd-DTPA were studied for detecting the characteristic appearances of hepatocellular carcinomas (HCC): fibrous capsules, fibrous septa, and mosaic appearances. Results were prospectively evaluated in 30 patients who subsequently underwent hepatic lobectomies or segmentectomies. Pathologic evaluations

Hiroshi Honda; Hideo Onitsuka; Junji Murakami; Kuniyuki Kaneko; Sadayuki Murayama; Eisuke Adachi; Takashi Kanematsu; Keizou Sugimachi; Kouji Masuda

1992-01-01

145

Soft-tissue changes after head and neck radiation: CT findings  

Microsoft Academic Search

To identify possible soft-tissue changes of the head and neck after radiation therapy, 102 CT scans from 78 patients with head and neck tumors were reviewed to assess (1) skin thickening, (2) epiglottic thickening, (3) stranding of subcutaneous fat, and (4) stranding of deep cervical fat. Scans were obtained after radiation therapy alone (10 cases), after radiation and surgery (27

A. D. Bronstein; D. A. Nyberg; A. N. Schwartz; W. P. Shuman; B. R. Griffin

1989-01-01

146

Bone Erosion Caused by Sinonasal Cavernous Hemangioma: CT Findings in Two Patients  

Microsoft Academic Search

Summary: We report two cases of cavernous hemangioma orig- inating in the sinonasal cavity. Although CT showed some en- hancing areas within both tumors, the substantial bone destruc- tion caused by these tumors made it difficult to differentiate them from the more common malignant epithelial tumors. An- giography was performed in one patient and showed character- istic pooling of contrast

Hyung-Jin Kim; Jung Hee Kim; Jae Hyoung Kim; Eui Gee Hwang

147

Congenital conductive hearing loss and multiple synostosis syndrome with analysis of temporal bone CT scan findings  

Microsoft Academic Search

We present the case of a mother and four children displaying signs of Multiple Synostosis Syndrome (SYNS1) associated with conductive hearing loss. The intra-familial phenotypic variation is due to variable penetrance, which is typical of this syndrome. The child with the most significant hearing loss showed lucency of the otic capsule on temporal bone CT. There is no evidence of

Jonathan A. Joseph; Toby Pillinger; Pieter M. Pretorius; Pablo Martinez-Devesa

2010-01-01

148

The Sturge-Weber syndrome: correlation between the clinical status and radiological CT and MRI findings  

Microsoft Academic Search

In the Sturge-Weber syndrome facial venous and leptomeningeal angiomas are associated. We studied 14 consecutive cases with clinical and radiological evaluations [computed tomography (CT) and magnetic resonance imaging (MRI)]. Radiological studies demonstrated the extent and patency of the leptomeningeal angiomatous malformation, the degree of parenchymal atrophy, the presumed ischemic changes affecting the gray and white matter, the presence and extent

L. Martí-Bonmatí; F. Menor; F. Mulas

1993-01-01

149

A comparative study of thin-section CT findings between seasonal influenza virus pneumonia and Streptococcus pneumoniae pneumonia.  

PubMed

Objective: To compare the pulmonary thin-section CT findings in patients with seasonal influenza virus pneumonia with Streptococcus pneumoniae pneumonia. Methods: The study group included 30 patients (20 males and 10 females; age range, 20-91 years; mean age, 55.9 years) with seasonal influenza virus pneumonia and 71 patients (47 males and 24 females; age range, 27-92 years; mean age, 67.5 years) with S. pneumoniae pneumonia. Results: The proportion of community-acquired infection was significantly higher in patients with influenza virus pneumonia than with S. pneumoniae pneumonia (p?=?0.001). CT findings of ground-glass attenuation (GGA) (p?=?0.012) and crazy-paving appearance (p?=?0.03) were significantly more frequent in patients with influenza virus pneumonia than with S. pneumoniae pneumonia. Conversely, consolidation (p?CT findings, such as consolidation and mucoid impaction may be useful in distinguishing between seasonal influenza virus pneumonia and S. pneumoniae pneumonia. Advances in knowledge: (1) Distinguishing seasonal influenza virus pneumonia with S. pneumoniae pneumonia is important. (2) The CT findings of GGA and crazy-paving appearance were more frequently found in patients with influenza virus pneumonia than in patients with S. pneumoniae pneumonia, whereas consolidation, mucoid impaction, centrilobular nodules and pleural effusion were more frequently found in patients with S. pneumoniae pneumonia. PMID:24834476

Ono, A; Okada, F; Takata, S; Hiramatsu, K; Ando, Y; Nakayama, T; Maeda, T; Mori, H

2014-07-01

150

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

151

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

PubMed Central

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

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

2014-01-01

152

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

Microsoft Academic Search

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

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

2010-01-01

153

Helical CT Evaluation of Potential Kidney Donors: Findings in 154 Subjects  

Microsoft Academic Search

OBJECTIVE. The purpose of our study was to assess renal helical CT (RHCT) as the pri- mary imaging technique in the evaluation of potential kidney donors. SUBJECTS AND METHODS. Unenhanced and enhanced (3-mm collimation) RHCT was performed in 154 kidney donors using 125-150 ml ofIV contrast material at an injection rate of 3 or 4 mi\\/sec and a pitch of

James H. Ellis; Melvyn Korobkin; Karen Reige

154

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

155

Calcifying Pseudoneoplasm of the Neuraxis. Two Case Reports and Review of CT and MR Findings.  

PubMed

Calcifying pseudoneoplasm is rarely encountered along the neuraxis, and only few cases have been reported to involve the spine. Its exact pathogenesis is unknown, and has been regarded as an unusual reactive process which must be differentiated from infection or malignancy. This rare entity carries a good prognosis after surgical resection. We report on the computed tomography and magnetic resonance imaging and diffusion-weighted features of calcifying pseudoneoplasm of the spine by describing two patients with involvement of the craniocervical junction, and thoracic spine. PMID:24029037

Muccio, C F; Cerase, A; Leone, A; Dalena, A M; Di Blasi, A; De Simone, M; Esposito, G

2012-09-01

156

CT findings for intracerebral hemorrhage have little incremental impact on post-stroke mortality prediction model performance  

PubMed Central

Background Stroke outcome studies often combine cases of intracerebral hemorrhage (ICH) and ischemic stroke (IS). These studies of mixed stroke typically ignore computed tomography (CT) findings for ICH cases, though the impact of omitting these traditional predictors of ICH mortality is unknown. We investigated the incremental impact of ICH CT findings on mortality prediction model performance. Methods Cases of ICH and IS (2000–2003) were identified from the Brain Attack Surveillance in Corpus Christi (BASIC) project. Base models predicting 30-day mortality included demographics, stroke type, and clinical findings (National Institutes of Health Stroke Scale (NIHSS) +/? Glasgow coma scale (GCS)). The impact of adding CT data (volume, intraventricular hemorrhage, infratentorial location) was assessed with the area under the curve (AUC), unweighted sum of squared residuals (?), and integrated discrimination improvement (IDI). The model assessment was performed first for the mixed case of IS and ICH, and then repeated for ICH cases alone to determine whether any lack of improvement in model performance with CT data for mixed stroke type was due to IS cases naturally forming a larger proportion of the total sample than ICH. Results A total of 1,256 cases were included (86% IS, 14% ICH). Thirty-day mortality was 16% overall (11% for IS; 43% for ICH). When both clinical scales (NIHSS and GCS) were included, none of the model performance measures showed improvement with the addition of CT findings whether considering IS and ICH together (?AUC: 0.002, 95% CI ?0.01, 0.02; ??: ?3.0, 95% CI ?9.1, 2.6; IDI: 0.017, 95% CI ?0.004, 0.05) or considering ICH cases alone (?AUC: 0.02, 95% CI ?0.02, 0.08; ? ?: ?2.0, 95% CI ?9.7, 3.4); IDI 0.065, 95% CI ?0.03, 0.21). If NIHSS was the only clinical scale included, there was still no improvement in AUC or ? when CT findings were added for the sample with IS/ICH combined (?AUC: 0.005, 95%CI ?0.01, 0.02; ??: ?5.0, 95%CI ?11.6, 1.0) or for ICH cases alone (?AUC: 0.05, 95% CI ?0.002, 0.11; ??: ?4.2, 95%CI ?11.5, 2.3). However, IDI was improved when NIHSS was the only clinical scale for IS/ICH combined (IDI: 0.029, 95%CI 0.002, 0.065) and ICH alone (IDI: 0.12, 95%CI 0.005, 0.26). Conclusions Excluding ICH CT findings had only minimal impact on mortality prediction model performance whether examining ICH and IS together or ICH alone. These findings have important implications for the design of clinical studies involving ICH patients.

Zahuranec, Darin B.; Sanchez, Brisa N.; Brown, Devin L.; Wing, Jeffrey J.; Smith, Melinda A.; Garcia, Nelda M.; Meurer, William J.; Morgenstern, Lewis B.; Lisabeth, Lynda D.

2012-01-01

157

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

158

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

159

CT findings in patients with gliomas, surviving more than 10 years.  

PubMed

After reviewing the latest CT scans of 23 mostly low grade glioma patients who survived more than 10 years after treatment, it was suggested that loss of the original tumour bulk and frequently the presence of porencephalic cavity replacing the original tumour, with a smooth lining which is not contrast-enhanced is essential to assume a clinical "cure" in the case of intrinsic cerebral gliomas. In the case of gliomas growing within the ventricle or subarachnoid space, tissue with calcium deposit but without contrast-enhancement was noted, although the number of cases was limited. PMID:6483067

Hatanaka, H; Sano, K; Kitamura, K; Fukui, M; Mogami, H; Ushio, Y; Kuwabara, T; Kyuma, Y; Inaba, Y; Hiratsuka, H

1984-07-01

160

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

PubMed Central

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

2011-01-01

161

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

PubMed

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

Piciucchi, Sara; Tomassetti, Sara; Casoni, Gianluca; Sverzellati, Nicola; Carloni, Angelo; Dubini, Alessandra; Gavelli, Giampaolo; Cavazza, Alberto; Chilosi, Marco; Poletti, Venerino

2011-01-01

162

Soft-tissue changes after head and neck radiation: CT findings  

SciTech Connect

To identify possible soft-tissue changes of the head and neck after radiation therapy, 102 CT scans from 78 patients with head and neck tumors were reviewed to assess (1) skin thickening, (2) epiglottic thickening, (3) stranding of subcutaneous fat, and (4) stranding of deep cervical fat. Scans were obtained after radiation therapy alone (10 cases), after radiation and surgery (27 cases), after surgery alone (24 cases), or before either surgery or radiation (41 cases). Skin thickening, epiglottic thickening, and stranding of subcutaneous fat were seen more frequently after radiation therapy than before such treatment. However, skin thickening and stranding of subcutaneous fat were sometimes also associated with tumor involvement and/or previous surgery, while epiglottic thickening was only occasionally associated with tumor involvement. Stranding of deep cervical fat was noted with increased frequency after radiation or surgery, but postradiation effects could not be reliably distinguished from postsurgical or tumor effects. We conclude that soft-tissue changes of the head and neck on CT may commonly be associated with previous radiation therapy, but these postradiation effects are not always distinguishable from postsurgical effects or tumor.

Bronstein, A.D.; Nyberg, D.A.; Schwartz, A.N.; Shuman, W.P.; Griffin, B.R.

1989-01-01

163

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

164

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

165

Contrast-enhanced ct and angiographic findings in hepatic perivascular epithelioid cell tumor.  

PubMed

We report a case of hepatic perivascular epithelioid cell tumor (PEComa) in a woman who was not a carrier of viral hepatitis and had a normal alpha-fetoprotein (AFP) level. CT scan showed a well-enhanced mass in the arterial-phase followed by early washout in the portal venous-phase in the lateral segment of the liver. Angiography revealed a hypervascular tumor in the liver with rapid washout of the contrast. If a hepatic tumor is found in a female patient with normal AFP level who is not a carrier of hepatitis and is free of alcoholic liver cirrhosis, tissue biopsy should precede treatment to avoid misdiagnosis of liver PEComa as hepatocellular carcinoma. PMID:24479295

Tay, Sh Y; Lao, W T; Chen, Ch L; Chan, W P

2013-01-01

166

The Association of Anisakiasis in the Ascending Colon with Sigmoid Colon Cancer: CT Colonography Findings  

PubMed Central

The association of anisakiasis of the colon with colon cancer is rare and difficult to diagnose. Only one case of this type has been reported to date. In this study, we report a case of synchronous colon cancer and colonic anisakiasis. A 50-year-old woman was admitted for abdominal pain, and a volume-rendered surface-shaded image of CT colonography (CTC) revealed a concentric narrowing in the sigmoid colon and a segmental fold thickening in the ascending colon. A total colectomy was performed and the diagnosis of synchronous sigmoid colon cancer and anisakiasis of the ascending colon was confirmed. This case is the first reported visualization of synchronous colon cancer and colonic anisakiasis on a CTC.

Yoo, Hye Jin; Lee, Jeong Min; Kim, Min A; Han, Joon Koo; Choi, Byung Ihn

2008-01-01

167

Ceramic liner fatigue fracture: 3-D CT findings in a late recurrent THA dislocation.  

PubMed

Dislocation is one of the most common complications of total hip arthroplasty (THA). To the authors' knowledge, late recurrent dislocation of a THA with a ceramic-on-ceramic coupling secondary to fatigue fracture of the ceramic liner has never been described. A 76-year-old woman with right hip osteoarthritis underwent cementless modular THA with a ceramic-on-ceramic coupling. Approximately 10 years postoperatively, she experienced right hip pain with no trauma, which resolved in 14 days. Family members reported that the patient had shown a progressive cognitive and muscular decline in the previous months. Six months later, the patient was admitted for THA dislocation, which was immediately reduced. Computed tomography revealed that the right acetabular component had a retroversion of 4° and an inclination angle of 45°. An orthopedic brace was applied, but dislocation recurred 2 days after discharge. A 3-dimensional CT reconstruction showed a fracture of the ceramic liner in the posterolateral region. The patient underwent revision surgery, and the ceramic liner breakage was confirmed. After removal of the acetabular components, a cemented polyethylene cup was implanted. The stability of the stem was verified. The existing modular neck was replaced with a chromium-cobalt neck, and a new ceramic head was applied. At 7-month follow-up, the patient had good functional recovery with no hip instability. Fatigue failure of a ceramic liner should be considered as responsible for late dislocation after ceramic-on-ceramic THA. As part of the diagnostic strategy, 3-dimensional CT reconstruction should be used to evaluate ceramic liner breakage. PMID:23276339

Trivellin, Giacomo; Sandri, Andrea; Bizzotto, Nicola; Marino, Marco Andrea; Mezzari, Silvio; Sambugaro, Elena; Regis, Dario

2013-01-01

168

CT findings of increased splanchnic circulation in a case of celiac sprue  

Microsoft Academic Search

We report a diagnosis of celiac disease first suggested by the computed tomographic appearance, which included findings indicative of increased splanchnic circulation. Similar findings have been reported with angiography and ultrasound but, to our knowledge, have not been reported with computed tomography.

P. P. Moser; J. K. Smith

2004-01-01

169

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

170

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

PubMed Central

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.

2013-01-01

171

Synovial chondromatosis simulating neoplastic degeneration of osteochondroma: findings on MRI and CT.  

PubMed

A case is presented of synovial chondromatosis within a bursal sac overlying an osteochondroma in a patient with osteochondromatosis. This condition presented with a symptomatic soft tissue mass containing calcified bodies. It can be mistaken clinically and radiographically for malignant degeneration of an osteochondroma with development of chondrosarcoma. Magnetic resonance findings have not previously been described in this entity and proved helpful in the preoperative diagnosis. Magnetic resonance imaging was also helpful in defining the extent of the lesion. Ultrasound and other imaging modalities are also discussed, including the pathologic basis for the radiographic findings. PMID:8191308

Schofield, T D; Pitcher, J D; Youngberg, R

1994-02-01

172

Giant benign cystic peritoneal mesothelioma: US, CT,and MRI findings  

Microsoft Academic Search

.   Benign cystic peritoneal mesothelioma (BCPM) is a rare tumor, primarily affecting young women; approximately 130 cases have\\u000a been described mainly in the pathological and surgical literature. We present imaging findings of a giant BCPM in a male patient\\u000a and discuss the radiological differential diagnosis with a brief review of the literature.

A. Özgen; D. Akata; O. Akhan; M. Tez; G. Gedikoglu; M. N. Özmen

1998-01-01

173

First finding of libyostrongylosis in farm-reared ostriches (Struthio camelus) in Croatia: unusual histopathological finding in the brain of two ostriches, naturally infected with Libyostrongylus douglasi.  

PubMed

In the present work, the very first finding of Libyostrongylus douglasi in farm-reared ostriches in Croatia, was described, not only as the main cause of the death, but also as the cause of persistent infection. The results of histopathological examination of almost all parenchymatous organs in two routinely necropsied ostriches were presented, including atypical histopathological finding in the brain and the result of the L. douglasi scanning electron microscopical (SEM) examination. In order to determine the parasite species to which the larval form found in the brain belonged, polymerase chain reaction (PCR) was performed. Total DNA was isolated from fresh L. douglasi, and from archival formalin-fixed and paraffin-embedded brain section. Additionally, the smears of the proventricular mucosal lining were cytologically examined. Virological examination for newcastle disease virus (NDV) was also performed. As there was very limited information concerned ostrich's health status in Croatian farms, a preliminary evaluation of the parasite infestation level in the Croatian ostrich population over the period 2001-2002 was also done, and an attempt at characterising individual parasite species, was made. PMID:17448602

Tisljar, Marina; Beck, R; Cooper, R G; Marinculi?, A; Tudja, M; Lukac-Novak, Irena; Grabarevi?, Z; Herak-Perkovi?, Vlasta; Simpraga, Borka

2007-06-20

174

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

175

Naeglaeria infection of the central nervous system, CT scan findings: a case series.  

PubMed

The imaging findings in four cases of a rare infection of the central nervous system caused by amoebae, Naeglaeria fowleri are presented. Naeglaeria fowleri are pathogenic free-living amoebae. They cause primary amoebic meningoencephalitis (PAM), a rapidly fatal disease of the central nervous system. The computed tomography brain findings in 3 (75%) of our cases of pan amoebic meningoencephalitis showed non-specific brain oedema; 2 (66%) of these cases also had moderate hydrocephalus and among that 1 (50%) case showed an old lacunar infarction in peri-ventricular region. In the remaining 1 (25%) case the scan was normal with no evidence of oedema or abnormal lesion. Out of three cases with diffuse brain oedema, postcontrast images showed abnormal meningeal enhancement throughout the brain parenchyma in 1 (33%) case. However, no definite focal enhancing lesion was noted. In the rest of the cases, no abnormal parenchymal or meningeal enhancement was seen on post-contrast images. PMID:23914650

Naqi, Rohana; Azeemuddin, Muhammad

2013-03-01

176

Mesenteric involvement in neurofibromatosis type 1: CT and MRI findings in two cases  

Microsoft Academic Search

We report computerized tomographic and magnetic resonance imaging findings of neurofibromatosis type 1 with mesenteric involvement in two patients. The first patient was a 13-year-old female with a panmesenteric plexiform neurofibroma with segmental involvement of the bowel wall; she had a 3-year history of abdominal pain. The second patient was a 60-year-old female who presented with malignant transformation of multiple

P. Ko?ucu; A. Ahmeto?lu; Ü. Çobano?lu; H. Dinç; O. Özdemir; H. R. Gümele

2003-01-01

177

PSA doubling time for prediction of [ 11 C]choline PET\\/CT findings in prostate cancer patients with biochemical failure after radical prostatectomy  

Microsoft Academic Search

Purpose  Previous studies have shown that the positive detection rate of [11C]choline positron emission tomography\\/computed tomography (PET\\/CT) depends on prostate-specific antigen (PSA) plasma levels.\\u000a This study compared PSA levels and PSA doubling time (PSADT) to predict [11C]choline PET\\/CT findings.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  PSADT was retrospectively calculated in 170 prostate cancer (PCa) patients with biochemical failure after radical prostatectomy\\u000a who underwent [11C]choline PET\\/CT. PSADT was

Giampiero Giovacchini; Maria Picchio; Vincenzo Scattoni; Rita Garcia Parra; Alberto Briganti; Luigi Gianolli; Francesco Montorsi; Cristina Messa

2010-01-01

178

Hepatic schwannoma: Imaging findings on CT, MRI and contrast-enhanced ultrasonography  

PubMed Central

A primary benign schwannoma of the liver is extremely rare and is difficult to preoperatively discriminate from a malignant tumor. We compared the imaging and pathological findings, and examined the possibility of preoperatively diagnosing a benign liver schwannoma. A 72-year-old woman was admitted to our hospital because of a 4.6-cm mass in the liver. A malignant tumor was suspected, and a right hepatectomy was performed. After this, the diagnosis of a primary benign schwannoma of the liver was made through pathological examination. Contrast-enhanced ultrasonography (CEUS) with Sonazoid showed minute blood flows into the septum and solid areas of the tumor in the vascular phase; most likely due to increased arterial flow associated with infiltration of chronic inflammatory cells. In the postvascular phase, CEUS showed contrast defect of cystic areas and delayed enhancement of solid areas; most likely due to aggregation of siderophores. Because discriminating between a benign and malignant schwannoma of the liver is difficult, surgery is generally recommended. However, the two key findings from CEUS may be useful in discriminating ancient schwannoma by recognizing the hemorrhage involved in the secondary degeneration and aggregation of siderophores.

Ota, Yu; Aso, Kazunobu; Watanabe, Kenji; Einama, Takahiro; Imai, Koji; Karasaki, Hidenori; Sudo, Ryuji; Tamaki, Yosui; Okada, Mituyoshi; Tokusashi, Yosihiko; Kono, Toru; Miyokawa, Naoyuki; Haneda, Masakazu; Taniguchi, Masahiko; Furukawa, Hiroyuki

2012-01-01

179

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

180

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

PubMed

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

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

2010-01-01

181

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

PubMed Central

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

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

2010-01-01

182

High-Resolution CT Scan Findings in Familial Interstitial Pneumonia Do Not Conform to Those of Idiopathic Interstitial Pneumonia  

PubMed Central

Background: The aim of this study was to describe the high-resolution CT (HRCT) scan features that characterize familial interstitial pneumonia (FIP). Methods: FIP was defined by the presence of two or more cases of probable or definite idiopathic interstitial pneumonia (IIP) in individuals related within three degrees. The cases were collected consecutively from three centers. We identified 371 individuals with potential FIP from 289 families, including 340 individuals who had HRCT scans. Two chest radiologists independently reviewed the HRCT scans, scoring the extent and distribution of HRCT scan findings, and assessed the overall radiologic diagnosis. Results: HRCT scan abnormalities suggestive of IIP were present in 85% (289 of 340 subjects). The most frequent findings were reticular pattern (n = 238, 82%) and ground-glass opacity (GGO) associated with reticular abnormality (n = 231, 80%). Other changes included GGO in 116 (40%), honeycombing in 92 (32%), and micronodules in 65 (22%). In the 289 cases with evidence of IIP, the findings were diffusely distributed in the craniocaudal plane in 186 (64%), and the lower lung zones were predominantly involved in 89 (31%). In the axial plane, 194 (67%) had a subpleural distribution; 88 (30%) were diffuse. The imaging pattern was classified as definite or probable usual interstitial pneumonia (UIP) in only 62 subjects (22%) and definite or probable nonspecific interstitial pneumonia (NSIP) in 35 subjects (12%). In 160 subjects (55%), the imaging findings did not conform to previously described UIP or NSIP patterns. Conclusions: Reticulation and a mixed GGO/reticular pattern are the most common HRCT scan findings in FIP. The parenchymal abnormalities are most often diffuse in the craniocaudal dimension and have a predominantly peripheral distribution in the axial dimension. Although a radiologic UIP pattern is not uncommon, most cases do not conform to typical UIP or NSIP patterns.

Lee, Ho Yun; Seo, Joon Beom; Steele, Mark P.; Schwarz, Marvin I.; Brown, Kevin K.; Loyd, James E.; Talbert, Janet L.

2012-01-01

183

CT colonography interpretation times: effect of reader experience, fatigue, and scan findings in a multi-centre setting.  

PubMed

Our purpose was to assess the effect of reader experience, fatigue, and scan findings on interpretation time for CT colonography. Nine radiologists (experienced in CT colonography); nine radiologists and ten technicians (both groups trained using 50 validated examinations) read 40 cases (50% abnormal) under controlled conditions. Individual interpretation times for each case were recorded, and differences between groups determined. Multi-level linear regression was used to investigate effect of scan category (normal or abnormal) and observer fatigue on interpretation times. Experienced radiologists (mean time 10.9 min, SD 5.2) reported significantly faster than less experienced radiologists and technicians; odds ratios of reporting times 1.4 (CI 1.1, 1.8) and 1.6 (1.3, 2.0), respectively (P

Burling, David; Halligan, Steve; Altman, Douglas G; Atkin, Wendy; Bartram, Clive; Fenlon, Helen; Laghi, Andrea; Stoker, Jaap; Taylor, Stuart; Frost, Roger; Dessey, Guido; De Villiers, Melinda; Florie, Jasper; Foley, Shane; Honeyfield, Lesley; Iannaccone, Riccardo; Gallo, Teresa; Kay, Clive; Lefere, Philippe; Lowe, Andrew; Mangiapane, Filipo; Marrannes, Jesse; Neri, Emmanuele; Nieddu, Giulia; Nicholson, David; O'Hare, Alan; Ori, Sante; Politi, Benedetta; Poulus, Martin; Regge, Daniele; Renaut, Lisa; Rudralingham, Velauthan; Signoretta, Saverio; Vagli, Paola; Van der Hulst, Victor; Williams-Butt, Jane

2006-08-01

184

Prediction of Nodal Involvement in Primary Rectal Carcinoma without Invasion to Pelvic Structures: Accuracy of Preoperative CT, MR, and DWIBS Assessments Relative to Histopathologic Findings  

PubMed Central

Objective To investigate the accuracy of preoperative computed tomography (CT), magnetic resonance (MR) imaging and diffusion-weighted imaging with background body signal suppression (DWIBS) in the prediction of nodal involvement in primary rectal carcinoma patients in the absence of tumor invasion into pelvic structures. Methods and Materials Fifty-two subjects with primary rectal cancer were preoperatively assessed by CT and MRI at 1.5 T with a phased-array coil. Preoperative lymph node staging with imaging modalities (CT, MRI, and DWIBS) were compared with the final histological findings. Results The accuracy of CT, MRI, and DWIBS were 57.7%, 63.5%, and 40.4%. The accuracy of DWIBS with higher sensitivity and negative predictive value for evaluating primary rectal cancer patients was lower than that of CT and MRI. Nodal staging agreement between imaging and pathology was fairly strong for CT and MRI (Kappa value?=?0.331 and 0.348, P<0.01) but was relatively weaker for DWIBS (Kappa value?=?0.174, P<0.05). The accuracy was 57.7% and 59.6%, respectively, for CT and MRI when the lymph node border information was used as the criteria, and was 57.7% and 61.5%, respectively, for enhanced CT and MRI when the lymph node enhancement pattern was used as the criteria. Conclusion MRI is more accurate than CT in predicting nodal involvement in primary rectal carcinoma patients in the absence of tumor invasion into pelvic structures. DWIBS has a great diagnostic value in differentiating small malignant from benign lymph nodes.

Zhou, Jun; Zhan, Songhua; Zhu, Qiong; Gong, Hangjun; Wang, Yidong; Fan, Desheng; Gong, Zhigang; Huang, Yanwen

2014-01-01

185

Posttherapeutic 131 I SPECT-CT offers high diagnostic accuracy when the findings on conventional planar imaging are inconclusive and allows a tailored patient treatment regimen  

Microsoft Academic Search

Purpose  The purpose of this prospective study was to determine the diagnostic impact and influence on patient treatment of posttherapeutic\\u000a 131I SPECT-CT when the findings on planar posttherapeutic whole-body scintigraphy (ptWBS) were inconclusive.\\u000a \\u000a \\u000a \\u000a Materials and methods  A total of 53 SPECT-CT scans were performed in 41 patients with thyroid cancer after high-dose 131I therapy (2.944 to 7.526 GBq 131I) because of diagnostic uncertainty

S. Kohlfuerst; I. Igerc; M. Lobnig; H. J. Gallowitsch; I. Gomez-Segovia; S. Matschnig; J. Mayr; P. Mikosch; M. Beheshti; P. Lind

2009-01-01

186

Hydrodynamic CT preoperative staging of gastric cancer: correlation with pathological findings. A prospective study of 107 cases  

Microsoft Academic Search

.   The aim of this study was to evaluate the accuracy of dynamic CT in the preoperative staging of gastric cancer. One hundred\\u000a seven patients affected by gastric cancer diagnosed by endoscopic biopsy were prospectively staged by dynamic CT prior to\\u000a tumor resection. After an oral intake of 400–600 ml of tap water and an intravenous infusion of a hypotonic

F. D'Elia; A. Zingarelli; D. Palli; M. Grani

2000-01-01

187

Bifid mandibular condyle: CT and MRI appearance.  

PubMed

Bifid mandibular condyle (BMC) is a rare asymptomatic morphological alteration with no predilection for age group or gender. Its morphology varies from a shallow groove to two condylar heads with separate necks, oriented mediolaterally or anteroposteriorly. This report describes an unusual case of bilateral mediolateral bifid condyle in a 24-year-old female patient with the main complaint of mouth-opening limitation. MRI and CT findings revealed bilateral bifid condyle. PMID:22922936

Tutar, Onur; Bas, Ahmet; Gülsen, Gökçe; Bayraktarov, Elmar

2012-01-01

188

Correlation of histological findings from a large ciliochoroidal melanoma with CT perfusion and 3T MRI dynamic enhancement studies  

PubMed Central

Background The initial use of a 64-slice computed tomography (CT) scanner for obtaining quantitative perfusion data from a large ciliochoroidal melanoma, and correlation with 3T magnetic resonance imaging (MRI) dynamic enhancement and tumor histology. Methods The CT perfusion scan was performed using 80 kVp, 250 mA and 1-sec rotation time for 40 sec. The analysis was performed using commercial perfusion analysis software with a prototype 3-dimensional motion correction tool. Dynamic contrast-enhanced 3-Tesla MRI measured the kinetics of enhancement to estimate the vascular permeability. The time-dependent enhancement patterns were obtained using the average signal intensity using Functool analysis software. The involved globe was enucleated and microscopic evaluation of the tumor was performed. Results The perfusion parameters blood flow, blood volume and permeability surface area product in the affected eye determined by CT perfusion analysis were 118 ml/100 ml/min, 11.3 ml/100 ml and 48 ml/100 ml/min. Dynamic MRI enhancement showed maximal intensity increase of 111%. The neoplasm was a ciliochoroidal spindle cell melanoma which was mitotically active (13 mitoses/40 hpf). Vascular loops and arcades were present throughout the tumor. The patient developed metastases within 9 months of presentation. Conclusion Quantitative CT perfusion analysis of ocular tumors is feasible with motion correction software.

Pulido, Jose S; Campeau, Norbert G; Klotz, Ernst; Primak, Andrew N; Saba, Osama; Gunduz, Kaan; Cantrill, Herbert; Salomao, Diva; McCollough, Cynthia H

2008-01-01

189

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

PubMed

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

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

2014-01-01

190

18F-FDG PET/CT findings in a patient with Sweet syndrome associated with myelodysplastic syndrome.  

PubMed

A 73-year-old man was admitted to our hospital because of a 2-year history of repeated painful edematous erythemas on the skin and pancytopenia for the last 8 months. FDG PET/CT demonstrated multiple cutaneous foci with increased tracer accumulation throughout the body, multiple FDG-avid lymph nodes in the mediastinum, bilateral pulmonary hili and abdomen, and diffusively increased FDG uptake of bone marrow. A skin biopsy revealed infiltration by neutrophilic granulocytes consistent with Sweet syndrome. Myelodysplastic syndrome was established on bone marrow aspiration and biopsy. PMID:23579974

Dong, Aisheng; Wang, Yang; Gao, Lei; Zuo, Changjing

2013-12-01

191

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

Cancer.gov

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

192

Dissecting aneurysm of the superior mesenteric artery associated with transomental hernia of the small bowel: helical CT findings  

Microsoft Academic Search

We present a case of intestinal obstruction caused by a transomental hernia with an associated finding of a dissecting aneurysm\\u000a of the superior mesenteric artery. These two rare conditions both cause acute abdomen with similar symptoms. This case shows\\u000a the possible diagnostic pitfalls of transomental hernia.

Tadao Hiromura; Hiroyuki Ikeda; Tatsuzou Tanabe

2000-01-01

193

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

194

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

PubMed Central

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

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

2014-01-01

195

Traumatic esophago-bronchopleural fistula-CT finding and treatment using glue: A procedure not so commonly performed  

PubMed Central

Bronchopleural fistulas can occur from a number of causes (infective, traumatic, or neoplastic). Combined esophageal-pleural and bronchopleural fistula is not a common entity and previously has been reported after pneumonectomy. We describe the imaging findings and procedure of endoscopic glue injection in a case of combined esophageal-pleural and bronchopleural fistula after penetrating thoracic trauma. The treatment included esophageal exclusion for esophageal-pleural fistula, followed by endoscopic injection of glue for closure of bronchopleural fistula. The fistulae were completely sealed.

Jana, Manisha; Gamanagatti, Shivanand R.; Kumar, Atin; Mishra, Biplab

2011-01-01

196

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

197

Evaluation of the relationship between smear positivity and high-resolution CT findings in children with pulmonary tuberculosis  

PubMed Central

Summary Background The aim of this study is to find a relationship between the radiological manifestations of childhood tuberculosis on a high-resolution computed tomography (HRCT) and the results of sputum smear. This study aims to propose an alternative indicator of infectivity in terms of prevention of disease transmission through selective isolation policy in children whose clinical condition is highly suggestive of tuberculosis. Material/Methods This retrospective comparative study was performed on 95 children under 15 years of age diagnosed with tuberculosis based on both WHO criteria and positive sputum culture for mycobacterium Tuberculosis. The children were admitted for TB screening in the pediatric department of national research institute of tuberculosis and lung disease (NRITLD) between 2008–2012. Direct smear collected from sputum or gastric lavage, as well as HRCT were performed in all children prior to administration of medical therapy. Children were divided into 2 groups based on positive and negative smear results. HRCT abnormalities, as well as their anatomical distribution were compared between these 2 groups using multivariate analytic model. Results The most prevalent abnormalities in the positive smear group were consolidation, tree-in-bud pattern, upper lobe nodular infiltration and cavitation. The negative smear group featured lymphadenopathy, consolidation, collapse and nodular infiltration in the upper lobe. Cavity, tree- in-bud pattern and upper lobe nodular infiltration were highly associated with smear positivity in children. Conversely, lymphadenopathy and collapse had significant association with a negative smear. Conclusions This study revealed that cavity, tree-in-bud and upper lobe nodular infiltration has significant association with smear positivity in childhood tuberculosis. On the other hand, lymphadenopathy and collapse were closely associated with smear negativity in this age group. It was also demonstrated that children with a positive smear most likely presented with radiological features of post primary tuberculosis, while the negative smear group most often manifested with primary tuberculosis.

Bolursaz, Mohammad Reza; Mehrian, Payam; Aghahosseini, Farahnaz; Lotfian, Ferial; Khalilzadeh, Soheila; Baghaie, Nooshin; Hassanzad, Maryam; Velayati, Ali Akbar

2014-01-01

198

Lung in Dengue: Computed Tomography Findings  

PubMed Central

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

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

2014-01-01

199

Lung cancer mimicking lung abscess formation on CT images  

PubMed Central

Patient: Male, 64 Final Diagnosis: Lung pleomorphic carcinoma Symptoms: Cough • fever Medication: — Clinical Procedure: — Specialty: Oncology Objective: Unusual clinical course Background: The diagnosis of lung cancer is often made based on computed tomography (CT) image findings if it cannot be confirmed on pathological examinations, such as bronchoscopy. However, the CT image findings of cancerous lesions are similar to those of abscesses.We herein report a case of lung cancer that resembled a lung abscess on CT. Case Report: We herein describe the case of 64-year-old male who was diagnosed with lung cancer using surgery. In this case, it was quite difficult to distinguish between the lung cancer and a lung abscess on CT images, and a lung abscess was initially suspected due to symptoms, such as fever and coughing, contrast-enhanced CT image findings showing a ring-enhancing mass in the right upper lobe and the patient’s laboratory test results. However, a pathological diagnosis of lung cancer was confirmed according to the results of a rapid frozen section biopsy of the lesion. Conclusions: This case suggests that physicians should not suspect both a lung abscesses and malignancy in cases involving masses presenting as ring-enhancing lesions on contrast-enhanced CT.

Taira, Naohiro; Kawabata, Tsutomu; Gabe, Atsushi; Ichi, Takaharu; Kushi, Kazuaki; Yohena, Tomofumi; Kawasaki, Hidenori; Yamashiro, Toshimitsu; Ishikawa, Kiyoshi

2014-01-01

200

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

201

Unusual properties of superoscillating particles  

Microsoft Academic Search

It has been found that differentiable functions can locally oscillate on length scales that are much smaller than the smallest wavelength contained in their Fourier spectrum---a phenomenon called superoscillation. Here, we consider the case of superoscillations in quantum mechanical wavefunctions. We find that superoscillations in wavefunctions lead to unusual phenomena that are of measurement theoretic, thermodynamic and information theoretic interest.

Achim Kempf; Paulo J. S. G. Ferreira

2004-01-01

202

The more you look, the more you find: challenging results on FDG-PET CT in a patient with neurofibromatosis type I  

PubMed Central

Background FDG-PET/CT is part of the standard diagnostic management of a patients with a large variety of common and less common malignant tumors, based on the increased glucose metabolism within tumors. Case presentation A hybrid fluorodeoxyglucose positron emission tomography and computed tomography (FDG-PET/CT) was performed in a neurofibromatosis patient to rule out relapse of malignant peripheral nerve sheet tumor. The scan revealed non-malignant neurofibromas, a testis seminoma and hypermetabolic syphilitic granulomata. Conclusion This case stresses the need to rule out infectious diseases when atypical hypermetabolic lesions are present.

2014-01-01

203

CT findings and serum ca 125 levels in malignant peritoneal mesothelioma: report of 11 new cases and review of the literature  

Microsoft Academic Search

The aim of this study was to review and reappraise the clinical and CT features of malignant peritoneal mesothelioma (MPM), and to discuss differential diagnosis. The history, clinical, and laboratory data, and imaging studies of 11 patients with a histologically proven diagnosis of MPM, were retrospectively reviewed. Our patients consisted of 7 women and 4 men, with a median age

Mahmut Kebapci; Eser Vardareli; Baki Adapinar; Mustafa Acikalin

2003-01-01

204

Optimizing the Balance Between Radiation Dose and Image Quality in Pediatric Head CT: Findings Before and After Intensive Radiologic Staff Training.  

PubMed

OBJECTIVE. The purpose of this study was to assess the radiation dose and image quality of pediatric head CT examinations before and after radiologic staff training. MATERIALS AND METHODS. Outpatients 1 month to 14 years old underwent 215 unenhanced head CT examinations before and after intensive training of staff radiologists and technologists in optimization of CT technique. Patients were divided into three age groups (0-4, 5-9, and 10-14 years), and CT dose index, dose-length product, tube voltage, and tube current-rotation time product values before and after training were retrieved from the hospital PACS. Gray matter conspicuity and contrast-to-noise ratio before and after training were calculated, and subjective image quality in terms of artifacts, gray-white matter differentiation, noise, visualization of posterior fossa structures, and need for repeat CT examination was visually evaluated by three neuroradiologists. RESULTS. The median CT dose index and dose-length product values were significantly lower after than before training in all age groups (27 mGy and 338 mGy ? cm vs 107 mGy and 1444 mGy ? cm in the 0- to 4-year-old group, 41 mGy and 483 mGy ? cm vs 68 mGy and 976 mGy ? cm in the 5- to 9-year-old group, and 51 mGy and 679 mGy ? cm vs 107 mGy and 1480 mGy ? cm in the 10- to 14-year-old group; p < 0.001). The tube voltage and tube current-time values after training were significantly lower than the levels before training (p < 0.001). Subjective posttraining image quality was not inferior to pretraining levels for any item except noise (p < 0.05), which, however, was never diagnostically unacceptable. CONCLUSION. Radiologic staff training can be effective in reducing radiation dose while preserving diagnostic image quality in pediatric head CT examinations. PMID:24848830

Paolicchi, Fabio; Faggioni, Lorenzo; Bastiani, Luca; Molinaro, Sabrina; Puglioli, Michele; Caramella, Davide; Bartolozzi, Carlo

2014-06-01

205

An unusual aortic coarctation  

PubMed Central

An unusual variety of aortic coarctation is described in which the left common carotid, left subclavian, and aberrant right subclavian arteries arose distal to the coarcted segment. The literature relating to unusual coarctation is briefly reviewed. Images

Le Roux, B. T.; Williams, M. A.

1968-01-01

206

Unusual spacecraft materials  

NASA Technical Reports Server (NTRS)

For particularly innovative space exploration missions, unusual requirements are levied on the structural components of the spacecraft. In many cases, the preferred solution is the utilization of unusual materials. This trend is forecast to continue. Several hypothetic examples are discussed.

Post, Jonathan V.

1990-01-01

207

Unusual presentation of metastatic adenocarcinoma  

PubMed Central

Background The most common tumours of the adrenal gland are adenoma, pheochromocytoma, adrenocortical carcinoma, and metastases. Although the imaging features of these tumours are established, the imaging characteristics of uncommon adrenal masses are less well known. In patients with extradrenal tumour, incidental discovery of an adrenal mass necessitates excluding the possibility of metastatic malignancy. Case presentation A 52 year-old female was diagnosed with oesophageal adenocarcinoma and treated with oesophagectomy and adjuvant chemotherapy. Sixteen months later on staging CT scan a 2 × 2 cm adrenal mass was detected, which increased in size over a period of time to 3 × 3 cm in size. Adrenalectomy was performed and histological examination revealed metastatic adenocarcinoma within an adrenal adenoma. Conclusion The present case highlights the unusual behaviour of an oesophageal adenocarcinoma causing metastasis to an adrenocortical adenoma.

Bagwan, Izhar N; Cook, Gary; Mudan, Satvinder; Wotherspoon, Andrew

2007-01-01

208

Cystic Meningioma Simulating Arachnoid Cyst: Report of an Unusual Case  

PubMed Central

The purpose of this paper is to show an unusual case of meningioma simulating arachnoid cyst on CT scan and MRI, diagnosed in a 63-year-old woman evaluated for headache and vision disorders. The meningioma shown is predominantly cystic with a small mural nodule enhancing after gadolinium and exhibiting diffusion restriction. Cystic portion of the tumor is hypodense on CT, and evidences fluid signal intensity on T1- and T2-weighted MR imaging.

Jorge, Docampo; Nadia, Gonzalez; Claudio, Vazquez; Carlos, Morales; Eduardo, Gonzalez-Toledo

2014-01-01

209

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

210

Peritoneal mesothelioma simulating pseudomyxoma peritonei on CT and sonography  

Microsoft Academic Search

We present an unusual case of peritoneal mesothelioma with ultrasound (US) and computed tomographic (CT) features of scalloping of liver margins and ascitic septations mimicking pseudomyxoma peritonei. A brief review of the literature is also presented.

Sanjay Gupta; R. K. Gupta; Ratni B. Gujral; Deepak Agarwal; Rajan Saxena; Pradeep Tandon

1992-01-01

211

An Unusual Lunar Halo  

ERIC Educational Resources Information Center

Discusses a photograph of an unusual combination of lunar halos: the 22-degree refraction halo, the circumscribed halo, and a reflection halo. Deduces the form and orientations of the ice crystals responsible for the observed halo features. (MLH)

Cardon, Bartley L.

1977-01-01

212

Unusual Imaging Appearance of an Intracranial Dermoid Cyst  

Microsoft Academic Search

Summary: Intracranial dermoid cysts have characteristic CT and MR imaging findings that generally make preop- erative diagnosis straightforward. Enhancement of uncom- plicated intradural dermoid cysts on CT or MR studies has been reported but is rare. We present a case of a posterior fossa dermoid cyst that was not only hyperattenuating on CT scans but also contained a mural nodule

Jacqueline Y. Brown; Andrew P. Morokoff; Peter J. Mitchell; Michael F. Gonzales

213

Unusual properties of superoscillating particles  

NASA Astrophysics Data System (ADS)

It has been found that differentiable functions can locally oscillate on length scales that are much smaller than the smallest wavelength contained in their Fourier spectrum—a phenomenon called superoscillation. Here, we consider the case of superoscillations in quantum mechanical wavefunctions. We find that superoscillations in wavefunctions lead to unusual phenomena that are of measurement theoretic, thermodynamic and information theoretic interest. We explicitly determine the wavefunctions with the most pronounced superoscillations, together with their scaling behaviour. We also briefly address the question of how superoscillating wavefunctions might be produced experimentally.

Kempf, Achim; Ferreira, Paulo J. S. G.

2004-12-01

214

Unusual Spinal Dysraphic Lesions  

PubMed Central

Human tail and multiple spinal dysraphism are unusual congenital malformations. Human tail appeared as a prominent lesion from the lumbosacrococcygeal region, generally without connection between the tail and the neurospinal axis. Spinal dysraphisms are usually isolated, reaching 0.038% of incidence of multiple spinal dysraphisms in the same child. There were three cases described of unusual spinal dysraphic lesions: two cases of human tail and a case of a multiple thoracic myelomeningocele. The literature about diagnosis and treatment was reviewed. Microsurgical technique was performed to provide better exploration of the lesions, and resection could be done in those congenital malformations, without morbidity.

Pacheco, Pollyana; Wanderley, Luiz Eduardo

2013-01-01

215

Chylous ascites: CT and ultrasound appearance  

Microsoft Academic Search

An unusual but pathognomonic appearance of chylous ascites was observed on computed tomographic (CT) and ultrasound examinations of the abdomen in a patient with AIDS and disseminated tuberculosis. The images showed gradual development of fat-fluid level in the peritoneal collection when the patient maintained a recumbent position. The explanation for this phenomenon is provided together with a brief review of

J. F. Hibbeln; M. D. Wehmueller; A. C. Wilbur

1995-01-01

216

CT evaluation of gastrointestinal tract perforation  

Microsoft Academic Search

The purpose of this study is to review the computed tomography (CT) appearance of gastrointestinal tract (GI) perforation. Forty-two patients with 10 cases of proximal GI perforation and 32 cases of distal GI perforation were evaluated based on the CT findings of extraluminal air (which was subdivided into the CT-falciform ligament sign crossing the midline and scattered pockets of air),

Kwok-Wan Yeung; Ming-Sung Chang; Chao-Peng Hsiao; Jee-Fu Huang

2004-01-01

217

CT -- Body  

MedlinePLUS

... tissues such as muscle and blood vessels. In pediatric patients, CT is rarely used to diagnose tumors of ... you through a built-in intercom system. With pediatric patients, a parent may be allowed in the room ...

218

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

219

Extracolonic Findings on Computed Tomography (CT) Colonography  

ClinicalTrials.gov

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

2013-01-25

220

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

2008-01-01

221

Unusual chiasmal visual field defects.  

PubMed

Masses beneath the chiasm usually cause superiorly denser field defects. This report showed two very rare field defects related with infrachiasmal compression, monocular inferotemporal quadrantanopia in Case 1 and monocular temporal and inferonasal field defect in Case 2. We presume that these very rare visual field defects might be caused by a compression between the mass and the anterior cerebral artery. The detailed anatomic relations of the compressed optic chiasm between the mass and the anterior cerebral artery are best revealed on a coronal T2-weighted image with a section thickness of 3 mm or less, and a routine brain MRI with a larger section thickness may not reveal such findings. Therefore, appropriate resolutions and a meticulous review of MR imaging may provide the clues to the etiology of these visual defects. In conclusion, the clinician should be aware that such unusual visual field defects could also be caused by a compression between the mass and anterior cerebral arteries. PMID:23563861

Kim, Jae Hyoung; Kim, Chae-Yong; Yang, Hee Kyung; Hwang, Jeong-Min

2013-11-01

222

Leukostasis in an Adult with AML Presenting as Multiple High Attenuation Brain Masses on CT  

PubMed Central

Acute myeloid leukemia (AML) is a hematologic malignancy that can present with central nervous system (CNS) symptoms. Neurological symptoms may result from the local accumulation of malignant cells in or near the brain (chloroma), infection, hemorrhage, or infarcts from leukostasis. Leukostasisis a syndrome that can include brain infarction due hyperviscosity of blood with vascular occlusion but CNS involvement is rarely encountered in adults. We report an unusual case of leukostasis in an adult who presented with multiple high attenuation intracranial masses on CT. While initially thought to represent chloromasthey proved to be hemorrhagic infarcts secondary toleukostasis on open brain biopsy. This condition is under-reported in the radiology literature and only rarely biopsy proven. We review in this paper the pathological, CT and MRI findings of leukostasis in order to increase awareness of this uncommon entity and facilitate diagnosis.

Algharras, Abdulaziz Ahmad; Mamourian, Alexander; Coyne, Thomas; Mohan, Suyash

2013-01-01

223

POEMS syndrome: unusual radiographic, scintigraphic and CT features  

Microsoft Academic Search

.   POEMS syndrome is a multisystemic disorder related to a plasma cell dyscrasia. Radiologically, this syndrome is characterized\\u000a by sclerotic focal bone lesions with a normal radionuclide bone scan. We report a case of POEMS syndrome with an expansile\\u000a lytic lesion in the sternum showing periosteal reaction and soft tissue mass, which revealed locally increased uptake of radiotracer\\u000a in bone

J. A. Narváez; C. Majós; C. Valls; L. Fernandez-Cabrera

1998-01-01

224

Rhiinosporidiosis - unusual presentations.  

PubMed

Rhinosporidiosis is an infection caused by Rhinosporidium seeberi that frequently presents as polypoidal nasal lesions. Here, we report two cases of rhinosporidiosis with unusual presentations. The first case presented in our department with chronic dacryocystitis of left side for endoscopic dacryocystorhinostomy (endoscopic DCR) operation. The second case presented as a long hanging mass arising from the right side of nasal septum. The diagnosis was established on the morphological basis by the identification of endospores and sporangia. The clinicopathological and immunologic features were discussed and the literature was reviewed. PMID:23120527

Ghosh, Anirban; Saha, Somnath; Srivastava, Abhishek; Mishra, Saibal

2008-06-01

225

Unusual swelling of elastin.  

PubMed

The swelling behavior of the elastin network has been investigated by comparing the linear expansion of samples of purified elastin with the volume expansion of the network, calculated on the basis of composition. Elastin sample dimensions and sample masses were measured under three conditions in which volume changes: thermal expansion at fixed water contents, deswelling due to dehydration, and swelling to greater than normal levels due to the swelling agent, sodium dodecyl sulfate. Isotropic network swelling usually changes length in proportion to the cube root of network volume, but length was found to be directly proportional to volume, showing a greater increase in length than expected. This unusual swelling behavior is attributed to an unusual elastin structure at the subfiber level, but there is insufficient detail on elastin's molecular organization to identify a mechanism to explain how it occurs. Assuming the network swells homogeneously, we describe two models that correctly predict swelling behavior, but these models imply a significant deviation from the structure generally assumed for an elastomeric polymer network of kinetically free molecular chains. Assuming that the network swells heterogeneously removes part of the difficulty with the models, but the observed direct proportionality between length and network volume remains to be explained. PMID:12012347

Lillie, M A; Gosline, J M

2002-07-15

226

Unusual gingival enlargement: a rare case report.  

PubMed

This is an atypical case report of a 20-year-old male patient who suffered from unusual unilateral, gingival enlargement together with rapidly progressive alveolar bone loss. The enlarged gingiva completely covered his left posterior teeth in both arches. The patient was diagnosed with gingival fibromatosis and aggressive periodontitis based on the clinical, histological, and radiographic findings. The gingival enlargement was treated by conventional gingivectomy under local anaesthesia. The postoperative result was uneventful. PMID:24715997

Dixit, Ashutosh; Dixit, Seema; Kumar, Pravin

2014-01-01

227

Unusual Gingival Enlargement: A Rare Case Report  

PubMed Central

This is an atypical case report of a 20-year-old male patient who suffered from unusual unilateral, gingival enlargement together with rapidly progressive alveolar bone loss. The enlarged gingiva completely covered his left posterior teeth in both arches. The patient was diagnosed with gingival fibromatosis and aggressive periodontitis based on the clinical, histological, and radiographic findings. The gingival enlargement was treated by conventional gingivectomy under local anaesthesia. The postoperative result was uneventful.

Dixit, Ashutosh; Dixit, Seema; Kumar, Pravin

2014-01-01

228

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.

229

Schwannoma of the nasal septum: An unusual finding.  

PubMed

Schwannomas of the nasal cavity are rare benign tumors, and those that arise from the nasal septum are even rarer. When they do occur, they usually become symptomatic early because of the close confines of the nasal cavity. We describe a case of nasal septal schwannoma that was noteworthy in that the patient-a 28-year-old woman-waited 8 months after the onset of symptoms to seek medical care. Her symptoms included complete right-sided nasal obstruction, occasional epistaxis, and hemifacial pain. The tumor was completely removed via an endoscopic approach. We discuss the clinical presentation, differential diagnosis, and treatment of this rarely encountered neoplasm. PMID:24652570

Dhingra, Shruti; Bakshi, Jaimanti; Mohindra, Satyawati

2014-03-01

230

PAPILLEDEMA: AN UNUSUAL FINDING IN A PATIENT WITH HERPES ENCEPHALITIS  

Microsoft Academic Search

Herpes simplex virus accounts for 10 to 25% of sporadic viral encephalitis throughout the world among people of different age with two peaks, one at 5 to 30 and the other at > 50 years of age. Pathologic process includes focal brain tissue inflammation and necrosis (predominantly temporal lobe). Therefore local neurological signs and symptoms will ensue. Although CSF pressure

A. Sudbakhsh; M. Mashayekh; S. Ghazvinian; B. Omidzohur

231

Bleomycin-related lung damage: CT evidence  

SciTech Connect

Computed tomography (CT) examinations of the chest were evaluated in 100 patients treated with bleomycin. The CT findings were compared with those of conventional chest radiographs and lung-function tests. Lung damage due to bleomycin was detected in 38% of patients by CT, while damage was detected in only 15% by radiography. Changes in appearance seen on CT scans due to bleomycin damage were compared with measurements of lung volume and gas transfer per unit lung volume. There was good correlation between severity of damage shown on CT scans and changes in lung volume. Gas transfer capabilities were reduced in most patients regardless of changes observed on CT scans. Sequential CT studies showed that complete resolution of bleomycin damage may occur within 9 months in patients with minor or moderate damage. Residual abnormalities were seen in all patients with severe damage.

Bellamy, E.A.; Husband, J.E.; Blaquiere, R.M.; Law, M.R.

1985-07-01

232

Use of ICT and its Relationship with Performance in Examinations: A Comparison of the ImpaCT2 Project's Research Findings Using Pupil-Level, School-Level and Multilevel Modelling Data  

ERIC Educational Resources Information Center

This paper reports a previously unpublished comparative analysis of data from the ImpaCT2 study investigating the relationship between students' performance in England on national tests and their reported use of information technology (particularly networked technology) for school work, at three age levels (11, 14 and 16), in English, Maths and…

Harrison, Colin; Lunzer, Eric A.; Tymms, Peter; Fitz-Gibbon, Carol Taylor; Restorick, Jane

2004-01-01

233

An unusual case of incaprettamento.  

PubMed

Incaprettamento is a ritual strangulation that represents a method of homicide typical of the Italian Mafia. While the victim is in the prone position, he/she is bound by one end of a rope, creating a slipknot around the throat, while the other end is used to tie the limbs behind the back. Forensic investigations reveal that in most cases, the binding of the extremities and the positioning of the victim are carried out after death due to others means and are intended to hold somebody in contempt and to punish betrayers. When the victim is tied while alive, the death is caused by self-strangulation because it is impossible to maintain the legs in this forced position. Here, we describe in detail a case with a lot of similarities to incaprettamento, although we define it as atypical because of the unusual methods of the actual binding and the circumstances in which death occurred. In fact, the investigation of the crime scene, the external and internal findings, and the histologic examination result show that this is a crime of passion. PMID:24457582

Focardi, Martina; Pinchi, Vilma; Defraia, Beatrice; Norelli, Gian-Aristide

2014-06-01

234

CT signs of urethral injury.  

PubMed

Computed tomography (CT) is the accepted frontline imaging modality for blunt abdominopelvic trauma. However, urethral injuries are traditionally diagnosed with retrograde urethrography. The CT appearances of urethral injuries and the signs associated with posterior urethral injuries are not well described in the literature. CT scans of patients with pelvic fractures and urethrographically proved posterior urethral injuries were evaluated. CT scans of patients with similar pelvic fractures who did not have urethral injuries were also evaluated. The CT findings of elevation of the prostatic apex, extravasation of urinary tract contrast material above the urogenital diaphragm (UGD), and extravasation of urinary tract contrast material below the UGD were specific for type I, II, and III urethral injuries, respectively. If extraperitoneal bladder rupture is present along with periurethral extravasation of contrast material, the possibility of type IV and IVA urethral injuries should be considered. In addition, the CT findings of distortion or obscuration of the UGD fat plane, hematoma of the ischiocavernosus muscle, distortion or obscuration of the prostatic contour, distortion or obscuration of the bulbocavernosus muscle, and hematoma of the obturator internus muscle were more common in patients with pelvic fractures and associated urethral injuries than in patients with uncomplicated pelvic fractures. PMID:12853670

Ali, Muhammad; Safriel, Yair; Sclafani, Salvatore J A; Schulze, Robert

2003-01-01

235

Rare case of urinary bladder agenesis - Multislice CT abdomen imaging  

PubMed Central

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

Indiran, Venkatraman; Chokkappan, Kabilan; Gunaseelan, Emmanuel

2013-01-01

236

Comparison of preoperative computed tomographic findings with postoperative histopathological findings in laryngeal cancers  

Microsoft Academic Search

In this study of 22 patients with laryngeal cancer, computed tomographic (CT) scans in the axial plane were compared with histopathological sections prepared in the same plane. The value of the preoperative CT for evaluating tumor invasion, location and size was then investigated. Findings demonstrated that CT was most sensitive in determining tumor invasion to the paralaryngeal and pre-epiglottic spaces,

M. Kazkayasi; T. Önder; Y. Özkaptan; C. Can; Y. Pabusçu

1995-01-01

237

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

238

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

239

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

PubMed

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

Tai, Mei-Ling Sharon; Velayuthan, Rukumani Devi

2014-04-15

240

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 Brière; Marcela Anitei; Jean-Emmanuel Filmont; David Sibon; Eric de Kerviler; Jean-Luc Moretti

2010-01-01

241

CT enterography with polyethylene glycol solution vs CT enteroclysis in small bowel disease  

PubMed Central

Objective The aim of the study is to compare CT enterography with polyethylene glycol solution (PEG-CT) with CT enteroclysis (CT-E) in patients with suspected small bowel disease. Methods 145 patients underwent abdominal contrast-enhanced 16-row multidetector CT after administration of 2000 ml of PEG by mouth (n = 75) or after administration of 2000 ml of methylcellulose by nasojejunal tube (n = 70). Small bowel distension, luminal and extraluminal findings were evaluated and compared with small bowel follow-through examination in 60 patients, double contrast enema in 50, surgery in 25 and endoscopy in 35. Statistical evaluation was carried out by ?2 testing. For both techniques we have also calculated the effective dose and the equivalent dose in a standard patient. Results Crohn's disease was diagnosed in 64 patients, neoplasms in 16, adhesions in 6. Distension of the jejunum was better with CT-E than PEG-CT (p<0.05: statistically significant difference). No significant difference was present for others sites (p>0.05). Evaluation of pathological ileal loops was good with both techniques. The values of sensitivity, specificity and diagnostic accuracy were respectively 94%, 100% and 96% with CT-E, and 93%, 94% and 93% with PEG-CT. The effective dose for PEG-CT was less than the dose for the CT-E (34.7 mSv vs 39.91 mSv). Conclusion PEG-CT shows findings of Crohn's disease as well as CT-E does, although CT-E gives better bowel distension, especially in the jejunum, and has higher specificity than PEG-CT.

Minordi, L M; Vecchioli, A; Mirk, P; Bonomo, L

2011-01-01

242

An unusual case of hypertensive encephalopathy.  

PubMed

This case report describes a 59-year-old male who presented with headaches, seizures and hypertension followed by coma. Initial magnetic resonance imaging showed T2 hyperintensities typical of Hypertensive Encephalopathy (HE), the follow up scans showed diffusion-weighted imaging (DWI) hyperintensities which is a rare finding in HE. DWI hyperintensities are typically suggestive of areas of cytotoxic damage, and the presence of these changes makes this case unusual, since the pathogenesis of HE is usually due to vasogenic oedema rather than cytotoxic damage of the brain tissue. PMID:15851096

Seneviratne, Janaka; Brotchie, Peter; Gates, Peter; Talman, Paul

2005-04-01

243

An Unusual Case of Rapidly Progressive Hyperbilirubinemia  

PubMed Central

We present an unusual case of hyperbilirubinemia with rapid early progression leading to bilirubin encephalopathy in a term neonate. Despite early recognition and intervention, the total serum bilirubin reached a maximum level of 39?mg/dL at 32 hours of life. Prior to an emergent exchange transfusion, the patient's diagnostic evaluation was significant for Coombs-negative microangiopathic hemolytic anemia and thrombocytopenia. Further testing revealed a deficiency of ADAMTS13 protein, or von Willebrand factor-cleaving protease, a finding diagnostic of congenital thrombotic thrombocytopenic purpura, or Upshaw-Schulman syndrome. This rare disease is often misdiagnosed, especially in the newborn period.

Thornton, Kimberly M.; Nyp, Michael F.; Music Aplenc, Lejla; Jones, Gary L.; Carpenter, Shannon L.; Guest, Erin M.; Shapiro, Steven M.; Manimtim, Winston M.

2013-01-01

244

CT and MR imaging of chondroblastoma of the temporal bone  

Microsoft Academic Search

We report a case of chondroblastoma of the temporal bone occurring in a 28-year-old man. Chondroblastoma is a benign bone tumor that classically occurs in the epiphysis of long bones in young people. The temporal bone is an unusual location. Computed tomography (CT) showed a mass in the temporal bone with bone erosion and destruction. On magnetic resonance (MR) imaging,

Ken Motoori; Kiyoshi Hiruma; Takashi Nikaido; Seiji Yamamoto; Takuya Ueda; Hisao Ito

2004-01-01

245

An unusual case of giant primary mediastinal liposarcoma.  

PubMed

Primary liposarcomas of the mediastinum are extremely rare. They have a dramatic clinical course. An unusual case of a giant primary liposarcoma of the mediastinum in a 49-year-old female is described. In spite of the tumor size the patient's only symptom was dry cough. Chest X-ray and CT showed a huge mass in the left pleural cavity. A radical procedure was performed with removal of a giant 25 x 31 cm soft fatty tumor. Pathology showed liposarcoma. The postoperative course was uneventful and follow-up examination after 12 months showed no recurrence of the disease. PMID:19670126

Gasiorowski, L; Dyszkiewicz, W; Piwkowski, C T

2009-06-01

246

An Unusual Exponential Graph  

NASA Astrophysics Data System (ADS)

This paper is an addition to the series of papers on the exponential function begun by Albert Bartlett.1 In particular, we ask how the graph of the exponential function y =e-t/? would appear if y were plotted versus ln t rather than the normal practice of plotting ln y versus t. In answering this question, we find a new way to interpret the mean life (or time constant) ? using such a linear-log graph.

Syed, M. Qasim; Lovatt, Ian

2014-05-01

247

An initial experience with screening for colon polyps using spiral CT with and without CT colography (virtual colonoscopy)  

Microsoft Academic Search

Background: Computed tomographic (CT) colography (virtual colonoscopy) is a new imaging method for detection of colon polyps and cancer. Objective: To evaluate the sensitivity of CT colography for polyp detection in a population without symptoms that included persons without colon neoplasia and with radiologists blinded to colonoscopic findings. Methods: Forty-six persons without symptoms underwent spiral CT followed by same-day colonoscopy

Douglas K. Rex; David Vining; Kenyon K. Kopecky

1999-01-01

248

An unusual shoulder injury  

PubMed Central

Traumatic pseudoaneurysm of the axillary artery is a rare sequel of shoulder injury. We report here a unique phenomenon of delayed presentation axillary pseudoaneurysm some time after an initial blunt injury, with no evidence of gross bony injury. The gentleman presented again some weeks later after a failure of rehabilitation and progressive neurological deficit in the affected arm. Ultimate management of the lesion was by endovascular insertion of a covered stent, and decompression of the axilla. Unfortunately the lack of subsequent neurological recovery parallels some of the findings in the literature, from cases where relief of the brachial plexus was not undertaken soon enough.

Moss, AJ; Valenti, D; Fraser, SC; Murie, J

2011-01-01

249

Unusual Cancers of the Chest  

MedlinePLUS

... a benign tumor begins to grow quickly, a fine-needle aspiration (FNA) biopsy or an excisional biopsy will be ... ray of the chest. CT scan . PET scan . Fine-needle aspiration (FNA) biopsy . See the General Information section for ...

250

The use of CT scanning in forensic autopsy  

Microsoft Academic Search

Postmortem computed tomography (CT) is being used more frequently in forensic medicine. This review discusses 100 deceased\\u000a individuals who underwent CT scanning, as well as a standard autopsy. The CT scan was performed and interpreted by a forensic\\u000a medicine specialist. In 11 cases, important findings discovered during the CT scan were not found at autopsy, and in 58 cases,\\u000a important

Peter Mygind Leth

2007-01-01

251

Stapes prosthesis: evaluation with CT.  

PubMed

We used computed tomography (CT) to evaluate 44 patients who had undergone stapedectomy with insertion of a prosthesis. Several patients had poor surgical results, including recurrent conductive hearing loss, vertigo, and sensorineural hearing loss. Conductive hearing loss occurring immediately after the procedure was most often caused by anatomic limitations or surgical technique. Causes of delayed or recurrent conductive hearing loss included reparative granuloma formation, incus necrosis (at the attachment of the wire), prosthesis subluxation (most often posterior), and regrowth of otosclerosis, which occasionally is further complicated by incus dislocation. We found that CT is often diagnostic when these complications occur. Immediate sensorineural hearing loss or vertigo can be self-limited if caused by serous labyrinthitis. When delayed, these symptoms may be due to perilymph fistula. If caused by the latter, CT may not yield abnormal findings unless subluxation of the prosthesis into the vestibule has occurred. PMID:3940377

Swartz, J D; Lansman, A K; Berger, A S; Wolfson, R J; Bell, G; Popky, G L; Swartz, N G

1986-01-01

252

How do Unusual Working Schedules Affect Social Life?  

Microsoft Academic Search

The widening of the working hour distribution complicates the coordination of social leisure. This paper examines the short- and long-run impact of unusual working schedules on social life using German Time Use Data for 2001\\/02. I find evidence that younger workers with higher than median earnings seem to accept higher levels of solitary leisure as investment and because of the

Juliane Scheffel

2011-01-01

253

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

2013-01-01

254

An Unusual Case of Bilateral Granulomatous Mastitis  

PubMed Central

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.

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

2013-01-01

255

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

256

Computed tomographic findings in bowel infarction  

SciTech Connect

Findings on computed tomography (CT) were considered diagnostic or highly suggestive in seven cases of bowel infarction. Important findings were portal or mesenteric venous gas, intramural gas, focal thickening of bowel wall, focal or diffusely dilated fluid-filled bowel, and clot in the superior mesenteric artery. Only one patient had unequivocal extraluminal gas on initial abdominal radiographs, although others had equivocal findings or later developed obvious extraluminal gas. Because CT may detect extraluminal gas and mesenteric arterial occlusion not apparent on plain films, and because CT is increasingly used early in the evaluation of abdominal pain, it can play an important role in the diagnosis and management of bowel infarction.

Federele, M.P. (Univ. of California, San Francisco); Chun, G.; Jeffrey, R.B.; Rayor, R.

1984-01-01

257

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

PubMed

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

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

2014-01-01

258

Evolution of IPv6 Internet topology with unusual sudden changes  

NASA Astrophysics Data System (ADS)

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

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

2013-07-01

259

The CT Scout View: Does It Need to Be Routinely Reviewed as Part of the CT Interpretation?  

PubMed

OBJECTIVE. The objective of our study was to determine whether the CT scout view should be routinely reviewed by comparing diagnostic information on the scout view with that provided by the correlative CT study. MATERIALS AND METHODS. Two radiologists blinded to history and CT findings reviewed retrospectively 2032 scout views. All cases with major findings (defined as any abnormality that would prompt additional diagnostic tests or require management) were correlated with the CT study, other imaging study, or medical record when necessary by a third radiologist to determine the validity of the scout view finding and whether the finding was identifiable on the current CT study. RESULTS. Major findings were identified in 257 (13%, reader 1) and 436 (23%, reader 2) of cases. Most major findings were confirmed (69-78%) or refuted (13-16%) by the CT study. However, 15 (6%, reader 1) and 48 (11%, reader 2) of the major findings were not included in the CT FOV, of which five (2%, reader 1) and 21 (5%, reader 2) constituted a missed pathologic finding. The most common one was cardiomegaly detected on a nonchest CT scout view. Additional pathologic findings included fracture, metastasis, avascular necrosis or subluxation of the humeral head, dilated bowel, and thoracic aortic dilatation. The most common false-positive finding was cardiomegaly. CONCLUSION. In a small percentage of cases, review of the CT scout view will disclose significant pathologic findings not included in the CT FOV. The results of this study support the routine inspection of the scout view, especially for the detection of pathologic findings in anatomic regions not imaged by CT. PMID:24848822

Johnson, Pamela T; Scott, William W; Gayler, Bob W; Lewin, Jonathan S; Fishman, Elliot K

2014-06-01

260

Brown tumor as an unusual but preventable cause of spinal cord compression: Case report and review of the literature  

PubMed Central

Brown tumor (BT), also known as osteoclastoma, may appear in the context of primary and secondary hyperparathyroidism. Spinal cord compression due to the BT is extremely rare. We present here an unusual case of BT involving thoracal spine and mandible. A 26-year-old woman, who had been on hemodialysis for chronic renal failure for over 6 years, got admitted with dorsal pain and progressive weakness in her lower extremities and gait disturbances. Neurological examination revealed spastic paraparesis and symmetrically hyperactive tendon reflex in the lower extremities. She had hypoesthesia under T10 level. On physical examination, a swelling on the left side of her jaw was also detected. Magnetic resonance imaging (MRI) showed cord compression due to an extradural mass lesion at T8 level. A computerized tomography (CT) scan showed that this expansile lytic lesion was caused by the collapse of vertebra corpus (T8) at that level. CT of the mandible revealed an expansile lytic lesion on left arm of the mandible. Laboratory findings were nearly normal except parathormone level elevation to 1289 pg/mL (normal 30-70 pg/mL). Ultrasound examination showed enlargement of the parathyroid glands. The patient underwent an emergency decompression and stabilization surgery. The lesion was fragile and reddish in appearance and was easy to aspirate. The tumor was reported as “BT.” Her weakness in the lower extremities improved in the early postoperative period. Following surgical intervention, the patient was transferred to nephrology clinic for additional medical treatment.

Tayfun, Hakan; Metin, Orakdogen; Hakan, Somay; Zafer, Berkman; Vardar, Aker Fugen

2014-01-01

261

Muscle imaging findings in GNE myopathy.  

PubMed

GNE myopathy (MIM 600737) is an autosomal recessive muscle disease caused by mutations in the UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE) gene. Besides the typical phenotype, characterized by the initial involvement of the distal leg muscles that eventually spreads proximally with sparing of the quadriceps, uncommon presentations with a non-canonical clinical phenotype, unusual muscle biopsy findings or both are increasingly recognized. The aim of our study was to characterize the imaging pattern of pelvic and lower limb muscles in GNE myopathy, thus providing additional diagnostic clues useful in the identification of patients with atypical features. We retrospectively evaluated muscle MRI and CT scans of a cohort of 13 patients heterogeneous for GNE mutations and degree of clinical severity. We found that severe involvement of the biceps femoris short head and, to a lesser extent, of the gluteus minimus, tibialis anterior, extensor hallucis and digitorum longus, soleus and gastrocnemius medialis was consistently present even in patients with early or atypical disease. The vastus lateralis, not the entire quadriceps, was the only muscle spared in advanced stages, while the rectus femoris, vastus intermedius and medialis showed variable signs of fatty replacement. Younger patients showed hyperintensities on T2-weighted sequences in muscles with a normal or, more often, abnormal T1-weighted signal. Our results define a pattern of muscle involvement that appears peculiar to GNE myopathy. Although these findings need to be further validated in a larger cohort, we believe that the recognition of this pattern may be instrumental in the initial clinical assessment of patients with possible GNE myopathy. PMID:22231866

Tasca, Giorgio; Ricci, Enzo; Monforte, Mauro; Laschena, Francesco; Ottaviani, Pierfrancesco; Rodolico, Carmelo; Barca, Emanuele; Silvestri, Gabriella; Iannaccone, Elisabetta; Mirabella, Massimiliano; Broccolini, Aldobrando

2012-07-01

262

Adrenal nonhyperfunctioning adenoma and nonadenoma: CT attenuation value as discriminative index  

Microsoft Academic Search

Background: When an asymptomatic adrenal mass is incidentally discovered on abdominal CT scans, the distinction between a nonhyperfunction ing adenoma and a nonadenoma would be important. Methods: We evaluated the CT findings of 36 adrenal masses (14 nonhyperfunction ing adenomas, 22 nonadenomas) in 34 patients with no evidence of hormonal hypersecretion. CT attenuation values of adrenal masses on CT scans

H. Miyake; H. Takaki; S. Matsumoto; S. Yoshida; T. Maeda; H. Mori

1995-01-01

263

Pathologically Proved Nonspecific Interstitial Pneumonia: CT Pattern Analysis as Compared with Usual Interstitial Pneumonia CT Pattern.  

PubMed

Purpose To assess the variability of computed tomography (CT) patterns in patients with pathologic nonspecific interstitial pneumonia (NSIP) and to evaluate correlation of CT patterns with new idiopathic pulmonary fibrosis (IPF) classification guidelines, including pathologic diagnosis and predicted mortality. Materials and Methods The ethical review boards of the five institutions that contributed cases waived the need for informed consent for retrospective review of patient records and images. The study included 114 patients with (a) a pathologic diagnosis of idiopathic NSIP (n = 39) or (b) a pathologic diagnosis of usual interstitial pneumonia (UIP) and a clinical diagnosis of IPF (n = 75). Two groups of independent observers evaluated the extent and distribution of various CT findings and identified the following five patterns: UIP, possible UIP, indeterminate (either UIP or NSIP), NSIP, and suggestive of an alternative diagnosis. CT findings were compared with pathologic diagnoses and outcome from clinical findings by using the log-rank test and Kaplan-Meier curves. Results Radiologists classified 17 cases as UIP, 24 as possible UIP, 13 as indeterminate (either UIP or NSIP), and 56 as NSIP. In 35 of 39 patients with pathologic NSIP, a diagnosis of NSIP was made with CT. On the basis of CT interpretations, the mean overall survival time of patients with UIP, possible UIP, indeterminate findings, or NSIP was 33.5, 73.0, 101.0, and 140.2 months, respectively. Outcome of patients with a CT diagnosis of UIP was significantly worse than that of patients with a pattern of possible UIP, indeterminate findings, or NSIP (log-rank test: P = .013, P = .018, and P < .001, respectively). Conclusion CT pattern in patients with pathologic NSIP is more uniform than that in patients with pathologic UIP, and CT NSIP pattern is associated with better patient outcome than is CT UIP pattern. © RSNA, 2014 Online supplemental material is available for this article. PMID:24661246

Sumikawa, Hiromitsu; Johkoh, Takeshi; Fujimoto, Kiminori; Arakawa, Hiroaki; Colby, Tomas V; Fukuoka, Junya; Taniguchi, Hiroyuki; Kondoh, Yasuhiro; Kataoka, Kensuke; Ogura, Takashi; Baba, Tomohisa; Ichikado, Kazuya; Gyobu, Tomoko; Yanagawa, Masahiro; Honda, Osamu; Tomiyama, Noriyuki

2014-08-01

264

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

265

Find Someone  

NSDL National Science Digital Library

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

2010-01-01

266

Chest CT Scan  

MedlinePLUS

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

267

NETL CT Imaging Facility  

ScienceCinema

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

None

2014-05-21

268

NETL CT Imaging Facility  

SciTech Connect

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

None

2013-09-04

269

Pelvic CT scan  

MedlinePLUS

... computer, viewed on a monitor, or printed on film. Three-dimensional models of the body area can ... Mosby; 2009:chap 19. Gjelsteen AC. CT, MRI, PET, PET/CT, and ultrasound in the evaluation of ...

270

False-Positive Result in 18F-Fluorocholine PET/CT Due to Incidental and Ectopic Parathyroid Hyperplasia.  

PubMed

PET/CT with F-fluorocholine (a positron-labeled choline analog) is currently used as a diagnostic tool for restaging prostate cancer patients with increasing prostate-specific antigen. We present an unusual case of a false-positive result using F-fluorocholine PET/CT because of incidental and ectopic parathyroid hyperplasia. PMID:24152627

Cazaentre, Thomas; Clivaz, Florence; Triponez, Frédéric

2014-06-01

271

Helical CT myelogram: the Ibadan initial experience.  

PubMed

To evaluate our initial experience with Helical Computed Tomography (CT) Myelogram in the investigation of spinal abnormalities. As late as 1980, CT was still regarded as unreliable compared with myelography however, the advent of slip-ring technology in the 1990s, in association with the use of more powerful computers and higher energy x-ray tubes allowed a process known as Helical CT. This revolutionized CT scanning allowing achievement of thinner slices in a single breath-hold. Helical CT myelogram is one of the recent applications with the potential of improving clinical diagnosis in patients with spinal disorders. This is a descriptive study of 56 patients who had a CT myelogram in the first 15 months of operation of a helical CT scanner at Ibadan (January 2004-March 2005). Axial scans were done after a lumbar puncture with injection of 8-10 mls of contrast (iopamidol). Demographic, clinical data and CT findings were analyzed. Patient ages ranged from 3 to 75 years. The highest age frequency was seen in the 4th and 5th decade. 37 (66%) of these patients were males and 19 (34%) were females. The majority of scans, 22 (39.2%) were in the thoracic and thoraco-lumbar regions. Low back pain was the most common indication 26 (32.1%) followed by paraplegia 24 (29.6%). Spinal cord compression and spondylosis represented 34% and 20% of the CT findings respectively. Helical CT myelogram is a valuable investigative tool which demonstrates spinal abnormalities well by providing a good silhouette image of the spinal cord. PMID:17876914

Ogunseyinde, O A; Ogbole, G I; Osuagwu, Y U

2007-03-01

272

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

273

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

274

UNUSUAL BACTEROIDES-LIKE ORGANISM  

PubMed Central

Goldberg, Herbert S. (University of Missouri, Columbia), Ella M. Barnes, and Anthony B. Charles. Unusual Bacteroides-like organism. J. Bacteriol. 87:737–742. 1964.—An organism is described which appears to be a new species of gram-negative, anaerobic, nonsporulating rod. It was isolated from poultry caeca at levels of 107 to 108 per g. It is primarily distinguished from related organisms by its unusual size (2.0 by 10.0 ?). It is biochemically differentiated from known species of Bacteroides, Fusobacterium, Sphaerophorous, and other accepted related genera. Its presence in large numbers in the gut of poultry, and its high metabolic activity would seem to indicate an important intestinal organism. Images

Goldberg, Herbert S.; Barnes, Ella M.; Charles, Anthony B.

1964-01-01

275

Unidentified phenomena - Unusual plasma behavior?  

NASA Astrophysics Data System (ADS)

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

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

1992-06-01

276

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

277

Some Considerations of the Findings  

ERIC Educational Resources Information Center

Investigated are the statistical findings of the IEA International Study of Mathematics Achievement and their implications in the areas of school organization, curriculum and instruction, and socioeconmic factors. Also given are a number of criticisms of the study and its significance. (CT)

Becker, Jerry P.; McKellar, Marie T.

1971-01-01

278

An unusual case of pneumocephalus  

PubMed Central

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

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

2011-01-01

279

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

280

Syringocystadenoma Papilliferum: An Unusual Presentation  

PubMed Central

Syringocystadenoma papilliferum is a benign hamartomatous adnexal tumour. Most of the patients present with solitary lesions in the head and neck region at birth or in early childhood. Multiple lesions are rarely seen and those which arise outside the head and neck region are even more uncommon. A case of syringocystadenoma papilliferum with multiple verrucous lesions and which was located in the right flank, an unusual site, has been presented.

Kumar, Parbodh; Varshney, Rahul

2014-01-01

281

Unusual foreign body of larynx  

Microsoft Academic Search

An interesting and unusual case of foreign body of larynx is presented here, where the foreign body—bubble gum—was lying over\\u000a the vocal cord and in subglottis. Bubble gum is used very commonly as a mouth cleaner. A balloon can be made for fun from\\u000a bubble gum, after chewing it well ; its thin layer is wrapped between teeth and tongue.

R. K. Mundra; S. K. Gupta; Charu Mishra; Ashok Bandi

1989-01-01

282

77 FR 76491 - Findings of Research Misconduct  

Federal Register 2010, 2011, 2012, 2013

...reported in the abstracts are being redone. Specifically, ORI finds that Respondent: Falsified Powerpoint slides and spreadsheets for histomorphometric and microCT results by using the values of HS1 knockout (KO) mice and their controls to...

2012-12-28

283

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

284

[Cardiac tumors: CT and MR imaging features].  

PubMed

The CT and MR imaging features of the main cardiac tumors will be reviewed. Cross-sectional imaging features may help differentiate between cardiac tumors and pseudotumoral lesions and identify malignant features. Based on clinical features, imaging findings are helpful to further characterize the nature of the lesion. CT and MR imaging can demonstrate the relationship of the tumor with adjacent anatomical structures and are invaluable in the presurgical work-up and postsurgical follow-up. PMID:20814374

Moskovitch, G; Chabbert, V; Escourrou, G; Desloques, L; Otal, P; Glock, Y; Rousseau, H

2010-09-01

285

CT diagnosis of cardiac and pericardial injuries  

Microsoft Academic Search

The purpose of this retrospective study was to determine the CT findings diagnostic of cardiac and pericardial injury, including\\u000a signs of pericardial tamponade, in patients suffering from blunt and penetrating trauma. A search of the CT radiology database\\u000a at a level I trauma center was performed to identify cases in which injury to the heart or pericardium was diagnosed, as

Karen L. Killeen; Pierre A. Poletti; K. Shanmuganathan; Stuart E. Mirvis

1999-01-01

286

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

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

2012-11-01

288

Kienböck's disease: two unusual cases.  

PubMed

Two unusual cases of Kienböck's disease are reported. The first is of a young woman whose presenting feature was spontaneous rupture of the flexor pollicis longus tendon. This is the first reported case in which such a rupture was the presenting feature of the condition. The second is of a 71-year-old woman with scleroderma and Raynaud's disease who did not develop her Kienböck's disease until late in life. The literature contains no older patient with this condition and a likely association is made between the avascular necrosis and the vasculitis associated with this connective tissue disorder. PMID:3249152

Ribbans, W J

1988-11-01

289

High level cross of the esophagus with the descending aorta in scoliosis: CT study  

SciTech Connect

The esophagus occasionally crosses the descending aorta at an unusually high level (3-5 cm inferior to the carina) in right-sided scoliosis. The purpose of this study was to analyze the mechanism of this finding. We prospectively evaluated thoracic CT scans in 30 patients with right-sided scoliosis. We assessed the alterations in the positions of the esophagus and the descending aorta by the thoracic deformity. The descending aorta followed the scoliotic curve of the spine in 26 (87%) patients. The esophagus followed the scoliotic curve of the spine in 14 (47%) patients and did not in 16 (53%). The anteroposterior diameter of the thorax in the former group was significantly smaller than that in the latter (p < 0.01). High level cross of both structures was identified in 14 (47%) patients, and all of them belonged to the group in which the esophagus did not follow the scoliotic curve of the spine. The unusual high level cross of the esophagus with the descending aorta occasionally seen in scoliosis is due to a difference in the positional alterations of the two structures resulting from the scoliosis. 6 refs., 3 figs.

Takahashi, Koji; Kikuno, Motoyuki; Hyodoh, Hideki [Jichi Medical School Hospital, Minamikawachi-machi, Tochigi-ken (Japan)] [and others] [Jichi Medical School Hospital, Minamikawachi-machi, Tochigi-ken (Japan); and others

1996-05-01

290

Multidetector CT of blunt abdominal trauma.  

PubMed

The morbidity, mortality, and economic costs resulting from trauma in general, and blunt abdominal trauma in particular, are substantial. The "panscan" (computed tomographic [CT] examination of the head, neck, chest, abdomen, and pelvis) has become an essential element in the early evaluation and decision-making algorithm for hemodynamically stable patients who sustained abdominal trauma. CT has virtually replaced diagnostic peritoneal lavage for the detection of important injuries. Over the past decade, substantial hardware and software developments in CT technology, especially the introduction and refinement of multidetector scanners, have expanded the versatility of CT for examination of the polytrauma patient in multiple facets: higher spatial resolution, faster image acquisition and reconstruction, and improved patient safety (optimization of radiation delivery methods). In this article, the authors review the elements of multidetector CT technique that are currently relevant for evaluating blunt abdominal trauma and describe the most important CT signs of trauma in the various organs. Because conservative nonsurgical therapy is preferred for all but the most severe injuries affecting the solid viscera, the authors emphasize the CT findings that are indications for direct therapeutic intervention. PMID:23175542

Soto, Jorge A; Anderson, Stephan W

2012-12-01

291

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

2010-01-01

292

SPECT/CT in the Diagnosis of Skull Base Osteomyelitis.  

PubMed

Skull base osteomyelitis is a potentially fatal disease. We demonstrate here the utility of SPECT/CT in diagnosing this entity, which was not obvious on a planar bone scan. A (99m)Tc MDP bone scan with SPECT/CT was carried out on a patient with clinically suspected skull base osteomyelitis. Findings were correlated with contrast-enhanced CT (CECT) and MRI. Planar images were equivocal, but SPECT/CT showed intense uptake in the body of sphenoid and petrous temporal bone as well as the atlas corresponding to irregular bone destruction on CT and MRI. These findings indicate that SPECT/CT may have an additional role beyond planar imaging in the detection of skull base osteomyelitis. PMID:24900006

Damle, Nishikant Avinash; Kumar, Rakesh; Kumar, Praveen; Jaganathan, Sriram; Patnecha, Manish; Bal, Chandrasekhar; Bandopadhyaya, Gurupad; Malhotra, Arun

2011-09-01

293

Multislice CT angiography  

Microsoft Academic Search

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

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

2003-01-01

294

Diagnosis and management of unusual dental abscesses in children.  

PubMed

Although the majority of dental abscesses in children originate from dental caries or trauma, a few are associated with unusual conditions which challenge diagnosis and management. Recent research findings have shed light on these unusual entities and greatly improved understanding of their clinical implications. These conditions include developmental abnormalities such as dens invaginatus in which there is an invagination of dental tissues into the pulp chamber and dens evaginatus in which a tubercle containing pulp is found on the external surface of a tooth crown. In addition, inherited conditions which show abnormal dentine such as dentine dysplasia, dentinogenesis imperfecta, and osteogenesis imperfecta predispose the dentition to abscess formation. Furthermore, 'spontaneous' dental abscesses are frequently encountered in familial hypophosphataemia, also known as vitamin D-resistant rickets, in which there is hypomineralization of dentine and enlargement of the pulp. In addition to developmental conditions, there are also acquired conditions which may cause unusual dental abscesses. These include pre-eruptive intracoronal resorption which was previously known as 'pre-eruptive caries' or the 'fluoride bomb'. In addition, some undiagnosed infections associated with developing teeth are now thought to be the mandibular infected buccal cysts which originate from infection of the developing dental follicles. In the present paper, these relatively unknown entities which cause unusual abscesses in children are reviewed with the aim of updating the general practitioner in their diagnosis and management. PMID:14640368

Seow, W K

2003-09-01

295

CT of tuberculosis and nontuberculous mycobacterial infections.  

PubMed

Radiologic manifestations of pulmonary tuberculosis (TB) can vary according to several host factors, including prior exposure to TB, age, and underlying immune status. Although chest radiography is the mainstay in the evaluation of pulmonary TB, CT generally is required to detect fine lesions overlooked on chest radiographs, to define equivocal lesions, or to evaluate complications. High-resolution CT is useful in understanding the pathologic process of the disease and in determining disease activity in selected cases. This article describes the characteristic CT findings of various forms of pulmonary TB and nontuberculous mycobacterial infection according to immune status of the patients, and assesses the role of CT in the diagnosis and management of pulmonary TB. PMID:11813821

Goo, Jin Mo; Im, Jung-Gi

2002-01-01

296

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

297

3D Volumetric CT Liver Segmentation Using Hybrid Segmentation Techniques  

Microsoft Academic Search

The first step for computer-aided diagnosis for liver of CT scans is the identification of liver region. To deal with multislice CT scans, automatic liver segmentation is required. In this paper, we propose a liver segmentation algorithm using hybrid techniques by combining morphological-based, region-based and histogram-based techniques to segment volumetric CT data. A morphological-based technique is used to find the

W. N. J. W. Yussof; H. Burkhardt

2009-01-01

298

Pneumoconiosis: comparison of imaging and pathologic findings.  

PubMed

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. PMID:16418244

Chong, Semin; Lee, Kyung Soo; Chung, Myung Jin; Han, Joungho; Kwon, O Jung; Kim, Tae Sung

2006-01-01

299

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

300

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

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

2013-01-01

302

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

303

Unusual Filaments inside the Umbra  

NASA Astrophysics Data System (ADS)

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

Kleint, L.; Sainz Dalda, A.

2013-06-01

304

[Musculoskeletal hydatidosis: an unusual location].  

PubMed

Hydatidosis is a zoonosis with a continuing high prevalence in our environment. The most commonly affected organs are the lungs and the liver, with the musculoskeletal location being considered an unusual one. We comment the case of a patient who presented a series of lesions in his left iliac crest and middle left buttock with spontaneous fistulization to the skin surface. In this case a combined treatment was given; prior to the surgical operation we administered a cycle of albendazol. Following removal of the lesion, the patient was given two further cycles of albendazol in order to minimize the risk of a recurrence of the illness. This patient is currently free of any symptoms relating to this illness. PMID:16817701

Pleguezuelo Navarro, M; Iglesias Flores, E M; Domínguez Jiménez, J L; González Galilea, A; Abad Lara, J A; Jiménez Sánchez, C; De Dios Vega, J F

2006-05-01

305

UNUSUAL FILAMENTS INSIDE THE UMBRA  

SciTech Connect

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

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

2013-06-10

306

SpaceWire Tiger Team Findings and Suggestions  

NASA Technical Reports Server (NTRS)

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

Ishac, Joseph A.

2011-01-01

307

A case of pneumoperitoneum and retropneumoperitoneum without bowel perforation due to extensive intestinal necrosis as a complication to chemotherapy: CT evaluation  

PubMed Central

Acute intestinal ischemia continues to be a challenging diagnostic problem with high mortality. We describe a rare case of acute intestinal necrosis, due to vasculitis, related with chemotherapy. A patient was examined in our emergency department, presenting with abdominal pain. Three months before he had undergone an operation for lung carcinoma (lobectomy) and received chemotherapy. CT of the abdomen demonstrated free air in 10 different locations: hepatic part of the portal vein, branches of mesenteric veins, femoral and iliac veins, the bowel wall, peritoneal cavity and retroperitoneal space, abdominal muscles, inguinal canals, meso-sigmoid space, and in the para-rectal space. Moreover, pathological findings revealed that the free air in the peritoneum and retropneumoperitoneum occurred without intestinal perforation, but with transudation through the necrotic bowel wall. This is a rare complication of chemotherapy. This case refers to the unusual CT findings which appeared in this patient. The key to a better outcome is early diagnosis of this condition and the CT examination of the abdomen plays an important role.

Antonopoulos, Petros; Siaperas, Petros; Demonakou, Maria; Alexiou, Kostas; Economou, Nikos

2013-01-01

308

A case of pneumoperitoneum and retropneumoperitoneum without bowel perforation due to extensive intestinal necrosis as a complication to chemotherapy: CT evaluation.  

PubMed

Acute intestinal ischemia continues to be a challenging diagnostic problem with high mortality. We describe a rare case of acute intestinal necrosis, due to vasculitis, related with chemotherapy. A patient was examined in our emergency department, presenting with abdominal pain. Three months before he had undergone an operation for lung carcinoma (lobectomy) and received chemotherapy. CT of the abdomen demonstrated free air in 10 different locations: hepatic part of the portal vein, branches of mesenteric veins, femoral and iliac veins, the bowel wall, peritoneal cavity and retroperitoneal space, abdominal muscles, inguinal canals, meso-sigmoid space, and in the para-rectal space. Moreover, pathological findings revealed that the free air in the peritoneum and retropneumoperitoneum occurred without intestinal perforation, but with transudation through the necrotic bowel wall. This is a rare complication of chemotherapy. This case refers to the unusual CT findings which appeared in this patient. The key to a better outcome is early diagnosis of this condition and the CT examination of the abdomen plays an important role. PMID:24349710

Antonopoulos, Petros; Siaperas, Petros; Troumboukis, Nikos; Demonakou, Maria; Alexiou, Kostas; Economou, Nikos

2013-01-01

309

Unusual imaging appearance of a huge intracranial dermoid cyst located across the anterior and middle skull base.  

PubMed

Intracranial dermoid cysts are rare congenital neoplasms. Typical dermoid cysts are well-circumscribed fat-density masses with no associated contrast enhancement. We report a woman with a dermoid cyst across the anterior and middle skull base of unusual imaging appearance. This report highlights the challenge facing the diagnosis and management of intracranial dermoid cysts with unusual primary imaging findings. PMID:23504668

Wang, Xuejian; Yu, Yong; Zhang, Xiaobiao; Hu, Fan; Gu, Ye; Xie, Tao; Yu, Hao; Cai, Zhenhua

2013-12-01

310

[A case of juvenile pilocytic astrocytoma with unusual neuroimaging features].  

PubMed

We present a case of cerebellar juvenile pilocytic astrocytoma(JPA) with unusual neuroimaging features. The patient was a 14-year-old male who suffered from chronic headaches for a couple of weeks. Plain craniogram showed a decalcification and bulging of the occipital bone. Computed tomography(CT) scans demonstrated low density multiple components with small calcifications in the right cerebellar hemisphere extending to the left. These calcifications were found at the margin of these multi-lobular components. Magnetic resonance imaging(MRI) revealed iso or low intensity on T1 weighted image, and slightly high intensity on T2 weighted image. The lesion indicated more heterogeneous and higher intensity than brain parenchyma on FLAIR imaging, and remarkable higher intensity than brain parenchyma with some small low intensity areas on diffusion weighted imaging. He underwent the complete resection except for the cranial tissue surrounding the pons. Histologic diagnosis was juvenile pilocytic astrocytoma, because of biphasic pattern of bipolar cells and a number of Rosenthal fibers. Generally JPA has sharp and smooth demarcated cysts with well-enhanced mural nodule. It was difficult to diagnose the presented tumor as JPA before operation, since its unusual neuroimaging resembled both dermoid and high grade gliomas. PMID:11360482

Matsushige, T; Yoshioka, H; Yamasaki, F; Sugiyama, K; Arita, K; Kurisu, K; Hamasaki, O; Yano, T

2001-04-01

311

Spiral CT angiography.  

PubMed

Spiral CT angiography is a new, minimally invasive technique for vascular imaging that is made possible by combining two recently developed techniques: slip-ring CT scanning and computerized three-dimensional (3D) reconstruction. The purpose of this essay is to illustrate the appearances of various normal and diseased vessels using this technique. PMID:8498233

Dillon, E H; van Leeuwen, M S; Fernandez, M A; Mali, W P

1993-06-01

312

Finding Colors  

NSDL National Science Digital Library

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

Sciencenter

2011-08-20

313

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

314

Optic Nerve Cysticercosis: Imaging Findings  

Microsoft Academic Search

Summary: We present the imaging findings of retrobulbar optic nerve cysticercosis in a 50-year-old woman with a 6- month history of vision loss. Contrast-enhanced CT re- vealed an approximately 7-mm ring-enhancing cyst with a mural nodule located in the anterior portion of the left op- tic nerve. A contrast-enhanced MR imaging study revealed a cystic lesion with peripheral enhancement of

Satish Chandra; Sushma Vashisht; Vimla Menon; Manorama Berry; Suresh K. Mukherji

315

FDG-PET/CT in lymphoma  

PubMed Central

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

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

2013-01-01

316

[CT imaging features of bronchiolitis].  

PubMed

Bronchiolitis may be encountered in numerous clinical circumstances. Previous history of smoking, infections, toxic exposure, immunodeficiency, chronic inflammatory disorders or transplantation must be known. CT findings consist in centrilobular micronodules with sharp or ill borders of various density and/or a mosaic attenuation with expiratory air trapping. Tree-in-bud pattern suggest an inflammatory or infectious bronchiolitis. The associated presence of bronchiectasis and bronchiolectasis must be considered. Imaging-pathologic correlations will be presented for inflammatory bronchiolitis (infectious bronchiolitis, hypersensitivity pneumonitis, respiratory bronchiolitis, follicular bronchiolitis, diffuse panbronchiolitis) and fibrosing bronchiolitis (constrictive bronchiolitis, post-infectious bronchiolitis, toxic fume exposure, transplant-related bronchiolitis). PMID:19953075

Beigelman-Aubry, C; Touitou, D; Mahjoub, R; Stivalet, A; Fernandez Perea, G; Grenier, P; Capron, F

2009-11-01

317

CT evaluation of chronic thromboembolic pulmonary hypertension.  

PubMed

Eight patients with chronic thromboembolic pulmonary hypertension (CTPH) that had been demonstrated by perfusion lung scan, pulmonary arteriography, and right heart catheterization had their pulmonary circulation evaluated by CT. Eight subjects without lung pathology were also studied for comparison. High resolution CT from apex to base with 1 cm thick sections after intravenous injection of contrast medium was performed in each individual. Emboli lodged in main pulmonary arteries on arteriography were regularly shown by CT, whereas those in segmental or smaller arteries were not detected. Diameters of the main pulmonary arteries measured on CT correlated with systolic pulmonary artery pressure (p < 0.001). The ratio between diameters of segmental arteries and the corresponding bronchi (A/B ratio) on CT was > 1 in 72 of 144 examined pulmonary segments (18 segments for each patient) in patients with CTPH. The ratio was > 1 in only 10 of 144 examined segments in normal control subjects. Dilatation of bronchial arteries was present in four of eight patients with CTPH. The parenchymal density in patients with CTPH was significantly higher in the axial than in the middle or peripheral lung compartments. In conclusion, CT may help with the diagnosis of CTPH by detecting thrombi of main arteries and by showing characteristic findings; moreover, it is accurate in estimating pulmonary arterial pressure secondary to thromboembolic obstruction. PMID:1430438

Falaschi, F; Palla, A; Formichi, B; Sbragia, P; Petruzzelli, S; Giuntini, C; Bartolozzi, C

1992-01-01

318

Orodental findings in postaxial acrofacial dysostosis  

PubMed Central

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

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

2014-01-01

319

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

320

A Rare Presentation of Myocardial Plasmacytoma Assessed by FDG PET/CT.  

PubMed

We describe a rare case of myocardial plasmacytoma staged and followed up with FDG PET/CT. A 72-year-old man was incidentally identified with a right ventricular apical mass, which was pathologically confirmed to be a plasmacytoma. A pre-treatment FDG PET/CT scan subsequently showed lesions not only in the right ventricle but also in the bones and mediastinal lymph nodes, which led to the change in treatment plan. Post-therapy PET scan revealed good response. This case demonstrates the value of FDG PET/CT in accurately staging unusually presented plasmacytoma and in monitoring response to treatment. PMID:24662655

Tong, Aaron Kian Ti; Mann, Karen P; Schuster, David M; Yan, Xuexian

2014-07-01

321

BVRI Photometry of 53 Unusual Asteroids  

NASA Astrophysics Data System (ADS)

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

Ye, Q.-z.

2011-02-01

322

Learning optimal eye movements to unusual faces.  

PubMed

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

Peterson, Matthew F; Eckstein, Miguel P

2014-06-01

323

Primary thyroid angiosarcoma: an unusual localization  

PubMed Central

The finding of thyroid nodules is a very common occurrence in routine clinical practice. Approximately 5% to 7% of the entire population have thyroid nodules. Vascular lesions are one of the most controversial issues in thyroid pathology. These include benign lesions such as hemangiomas and, rarely, malignant tumors such as angiosarcomas or undifferentiated angiosarcomatoid carcinomas. In particular, angiosarcoma of the thyroid gland is a rare, highly aggressive malignant vascular tumor and in Italy the greatest geographical incidence of this lesion is witnessed near the Alps. Here, a case of thyroid angiosarcoma in a 71-year-old man with a history of goiter for about 20 years is described. The unusual localization of this lesion, the difficulties in reaching a definitive diagnosis for this particular histological type of primary tumor and a history of long-standing multinodular goiter in thyroid of an older man from outside the Alpine region prompted us to report this case of thyroid angiosarcoma mainly to discuss surgical, histopathological and immunohistochemical features.

2012-01-01

324

Unusual foreign bodies in the orofacial region.  

PubMed

Foreign bodies may be deposited in the oral cavity either by traumatic injury or iatrogenically. Among the commonly encountered iatrogenic foreign bodies are restorative materials like amalgam, obturation materials, broken instruments, needles, and so forth. The discovery of foreign bodies in the teeth is a special situation, which is often diagnosed accidentally. Detailed case history, clinical and radiographic examinations are necessary to come to a conclusion about the nature, size, location of the foreign body, and the difficulty involved in its retrieval. It is more common to find this situation in children as it is a well-known fact that children often tend to have the habit of placing foreign objects in the mouth. Sometimes the foreign objects get stuck in the root canals of the teeth, which the children do not reveal to their parents due to fear. These foreign objects may act as a potential source of infection and may later lead to a painful condition. This paper discusses the presence of unusual foreign bodies-a tip of the metallic compass, stapler pin, copper strip, and a broken sewing needle impregnated in the gingiva and their management. PMID:22830058

Passi, Sidhi; Sharma, Neeraj

2012-01-01

325

Granulocytic sarcoma: three unusual patients.  

PubMed

This report describes three unusual patients with lesions due to myeloblasts. In one instance, the patient presented with massive adenopathy. The second patient had bone lesions and a pathologic fracture. The third patient, with myelodysplasia, had diffuse skin lesions infiltrated with myeloblasts. These cases fit the diagnostic category of granulocytic sarcoma. Granulocytic sarcoma is a tumor of immature myeloid cells that may involve any site in the body but that most commonly affects the skin, soft tissues, lymph nodes, bone, and periosteum. Lesions can predate leukemia or occur late in an established chronic granulocytic leukemia or acute granulocytic leukemia. The most common presentation occurs late in the course of acute granulocytic leukemia or in chronic granulocytic leukemia as a herald to blastic transformation. Therapy for localized lesions is radiotherapy, which produces prompt shrinkage of the lesions but relapse occurs subsequently. Systemic chemotherapy also produces satisfactory clinical results. In all instances, therapy can only be considered palliative since virtually all patients have a short survival following the appearance of an extramedullary myeloblastic lesion. Recognition of this pathologic entity at an early stage may give us information on the best management for these patients. PMID:2773969

Gittin, R G; Scharfman, W B; Burkart, P T

1989-09-01

326

The course of the traumatising force in acceleration head injury: CT evidence  

Microsoft Academic Search

Since brain damage in closed head injury of acceleration-deceleration type depends on the site of impact and on the course of the traumatising force, a reconstruction of these was attempted using CT. The study included 45 standard CT studies of adults with closed acceleration-deceleration head injuries. We selected 32 patients exclusively on the basis of CT findings of soft tissue

N. Bešenski; R. Broz; D. Jadro-Šantel; D. Pavi?; D. Mikuli?

1996-01-01

327

Association of Early CT Abnormalities, Infarct Size, and Apparent Diffusion Coefficient Reduction in Acute Ischemic Stroke  

Microsoft Academic Search

BACKGROUND AND PURPOSE: Diffusion-weighted (DW) imaging is more sensitive for early ischemia than CT, and apparent diffusion coefficient (ADC) mapping permits quantification of the severity of cytotoxic edema. We examined the relationship between early CT findings, ischemic lesion volume on DW images, and edema subtype. METHODS: Patients in whom early signs of ischemia were detected on baseline CT scans were

Diederik M. Somford; Michael P. Marks; Vincent N. Thijs; David C. Tong

328

Histopathological correlates of abnormal pericolic fat on CT in the assessment of colorectal carcinoma  

Microsoft Academic Search

The aim of this study was to assess the pathological significance of abnormal pericolic fat shown by CT in the context of colorectal carcinoma. CT and histopathological findings of 63 resected colorectal carcinomas were retrospectively reviewed. CT examinations were assessed by two observers for the presence or absence of abnormal pericolic fat (typically linear or nodular opacities) at tumour sites.

T C DOYLE; A K DIXON; R MILLER; M J ARENDS

329

[Primary epiploic appendicitis: an etiology of acute abdomen revealed by CT scan].  

PubMed

Primary epiploic appendicitis are considered to be a rare cause of acute abdomen. We reported 2 cases in which computed tomography CT suggested the diagnosis. Primary epiploic appendicitis shows characteristic CT findings that allow the diagnosis and follow-up. This entity resolves spontaneously and CT helps in avoiding unnecessary surgery. PMID:12878072

Bretagnol, F; Gomez, M A; Pautrat, K; Scotto, B; de Calan, L

2003-06-01

330

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

331

Lumbosacral spine CT  

MedlinePLUS

You should remove all jewelry or other metal objects before the test, as they may cause inaccurate images. ... is small. The risk increases as numerous additional studies are performed. In some cases, a CT scan ...

332

Lipoma of the liver: US, CT, and MRI appearance  

Microsoft Academic Search

A case of hepatic lipoma is reported. Since the sonographic (US), computed tomographic (CT), and magnetic resonance imaging (MRI) findings are characteristic, we believe more aggressive diagnostic procedures are not necessary.

Luis Martí-Bonmatí; Francisco Menor; Isidro Vizcaino; Jose Vilar

1989-01-01

333

Postoperative Radiographic Findings Following Acoustic Neuroma Removal  

PubMed Central

This paper assesses the radiographic findings seen on early postoperative CT following acoustic neuroma resection. CT head scans were routinely obtained from 86 patients within 24 hours of tumor resection via a translabyrinthine or retrosigmoid approach. Repeat CT scans were performed in those patients with abnormal clinical symptoms. The abnormalities seen on postoperative CT included cerebellar hematoma (nine patients), cerebral and/or cerebellar infarction (six patients), CSF leak at the incision (two patients), subdural hematoma (two patients), hydrocephalus (one patient), and residual acoustic neuroma (two patients). An unexpected CT finding was ipsilateral temporal lobe lucency, suggesting venous edema, ischemia, and/or infarction in 16% (14/86) of patients. Overall, the clinical complication rate was 8%, and subclinical CT abnormalities were seen in 17% of patients. Temporal lobe venous edema, ischemia, or infarction is a complication of translabyrinthine resection of acoustic neuroma and is thought to be due to obstruction of an inferior temporal lobe draining vein. Some cases may be related to intraoperative interruption of the superior petrosal sinus or petrosal vein, and/or coagulation of the sigmoid sinus dural margins, interruption of an inferior temporal vein, or venous hypotension. Care in dealing with the superior petrosal and sigmoid sinuses at surgery is needed. ImagesFigure 1Figure 2Figure 3Figure 4Figure 6

Horowitz, Sandra W.; Leonetti, John P.; Azar-Kia, Behrooz; Anderson, Douglas

1996-01-01

334

Postoperative radiographic findings following acoustic neuroma removal.  

PubMed

This paper assesses the radiographic findings seen on early postoperative CT following acoustic neuroma resection. CT head scans were routinely obtained from 86 patients within 24 hours of tumor resection via a translabyrinthine or retrosigmoid approach. Repeat CT scans were performed in those patients with abnormal clinical symptoms. The abnormalities seen on postoperative CT included cerebellar hematoma (nine patients), cerebral and/or cerebellar infarction (six patients), CSF leak at the incision (two patients), subdural hematoma (two patients), hydrocephalus (one patient), and residual acoustic neuroma (two patients). An unexpected CT finding was ipsilateral temporal lobe lucency, suggesting venous edema, ischemia, and/or infarction in 16% (14/86) of patients. Overall, the clinical complication rate was 8%, and subclinical CT abnormalities were seen in 17% of patients. Temporal lobe venous edema, ischemia, or infarction is a complication of translabyrinthine resection of acoustic neuroma and is thought to be due to obstruction of an inferior temporal lobe draining vein. Some cases may be related to intraoperative interruption of the superior petrosal sinus or petrosal vein, and/or coagulation of the sigmoid sinus dural margins, interruption of an inferior temporal vein, or venous hypotension. Care in dealing with the superior petrosal and sigmoid sinuses at surgery is needed. PMID:17171009

Horowitz, S W; Leonetti, J P; Azar-Kia, B; Anderson, D

1996-01-01

335

An unusual cause of a fall: an unusual presentation of lung carcinoma.  

PubMed

An 80-year-old gentleman presented with a fall and subtle symptoms suggestive of a cerebellar lesion, on a background of hemiparesis due to a previous cerebral vascular accident. On admission it was thought that changes on a chest radiograph were consistent with a community-acquired pneumonia. A CT of the head showed a space-occupying lesion in the right cerebellum with surrounding oedema. A previous MRI of the brain performed 8 months earlier for investigation of dementia showed evidence of this lesion although it was significantly smaller and without midline shift; however, this had not been discussed on the MRI report. A subsequent CT of the thorax confirmed a thick-walled cavitating mass in the left upper lobe, with biopsy of this lesion and bronchial washings showing metaplastic and atypical cells suggestive of adenocarcinoma. This report highlights both the importance of accurate imaging reporting, even of incidental findings, and the insidious nature of lung malignancy and its broad clinical presentation. PMID:24811107

Kowa, Xin-Ying; Hyams, Catherine; Farrugia, Mark; Lightowlers, Sara

2014-01-01

336

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

337

CT diagnosis of Budd-Chiari syndrome.  

PubMed

The computed tomographic (CT) findings in Budd-Chiari syndrome are described. With repeated injections of contrast medium, using an angio-CT technique, the authors consistently obtained a good and homogeneous enhancement of the liver parenchyma and vascular structures. The portal and hepatic veins were routinely seen. In Budd-Chiari syndrome, the authors found patchy enhancement of the involved section of the liver and absence of visualization of the hepatic veins. The latter is considered characteristic of hepatic vein obstruction and should not be misinterpreted as a consequence of neoplastic lesion. PMID:7240512

Rossi, P; Sposito, M; Simonetti, G; Sposato, S; Cusumano, G

1981-06-01

338

Intraabdominal panniculitis: clinical, radiographic, and CT features  

SciTech Connect

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

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

1985-08-01

339

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

340

Unusual cause of pulmonary emboli.  

PubMed

Pulmonary emboli resulted due to intravasation of iophendylate during myelography the previous day. Findings consistent with pulmonary emboli in nonambulatory patients after myelography should not always be diagnosed as thromboembolic disease from blood clots. PMID:6478908

Vitums, V C

1984-10-01

341

Three unusual sesquineolignans from Alpinia conchigera.  

PubMed

Three unusual sesquineolignans conchignans A, B, and C, together with two known compounds vanillin and phloroglucinol, were isolated from the whole plants of Alpinia conchigera. Their structures were established by spectroscopic analysis, including 2D NMR spectroscopic techniques. PMID:23796227

Xu, Jun-Ju; Zhao, Hong-Mei; Shen, Yong; Chen, Jian-Hua; Li, Yan; Tan, Ning-Hua; Yang, Sheng-Chao

2013-01-01

342

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

343

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

344

Characterizing anatomical variability in breast CT images  

PubMed Central

Previous work [Burgess , Med. Phys. 28, 419–437 (2001)] has shown that anatomical noise in projection mammography results in a power spectrum well modeled over a range of frequencies by a power law, and the exponent (?) of this power law plays a critical role in determining the size at which a growing lesion reaches the threshold for detection. In this study, the authors evaluated the power-law model for breast computed tomography (bCT) images, which can be thought of as thin sections through a three-dimensional (3D) volume. Under the assumption of a 3D power law describing the distribution of attenuation coefficients in the breast parenchyma, the authors derived the relationship between the power-law exponents of bCT and projection images and found it to be ?section=?proj?1. They evaluated this relationship on clinical images by comparing bCT images from a set of 43 patients to Burgess’ findings in mammography. They were able to make a direct comparison for 6 of these patients who had both a bCT exam and a digitized film-screen mammogram. They also evaluated segmented bCT images to investigate the extent to which the bCT power-law exponent can be explained by a binary model of attenuation coefficients based on the different attenuation of glandular and adipose tissue. The power-law model was found to be a good fit for bCT data over frequencies from 0.07to0.45cyc?mm, where anatomical variability dominates the spectrum. The average exponent for bCT images was 1.86. This value is close to the theoretical prediction using Burgess’ published data for projection mammography and for the limited set of mammography data available from the authors’ patient sample. Exponents from the segmented bCT images (average value: 2.06) were systematically slightly higher than bCT images, with substantial correlation between the two (r=0.84).

Metheany, Kathrine G.; Abbey, Craig K.; Packard, Nathan; Boone, John M.

2008-01-01

345

Characterizing anatomical variability in breast CT images.  

PubMed

Previous work [Burgess et al., Med. Phys. 28, 419-437 (2001)] has shown that anatomical noise in projection mammography results in a power spectrum well modeled over a range of frequencies by a power law, and the exponent (beta) of this power law plays a critical role in determining the size at which a growing lesion reaches the threshold for detection. In this study, the authors evaluated the power-law model for breast computed tomography (bCT) images, which can be thought of as thin sections through a three-dimensional (3D) volume. Under the assumption of a 3D power law describing the distribution of attenuation coefficients in the breast parenchyma, the authors derived the relationship between the power-law exponents of bCT and projection images and found it to be betasection=betaproj-1. They evaluated this relationship on clinical images by comparing bCT images from a set of 43 patients to Burgess' findings in mammography. They were able to make a direct comparison for 6 of these patients who had both a bCT exam and a digitized film-screen mammogram. They also evaluated segmented bCT images to investigate the extent to which the bCT power-law exponent can be explained by a binary model of attenuation coefficients based on the different attenuation of glandular and adipose tissue. The power-law model was found to be a good fit for bCT data over frequencies from 0.07 to 0.45 cyc/mm, where anatomical variability dominates the spectrum. The average exponent for bCT images was 1.86. This value is close to the theoretical prediction using Burgess' published data for projection mammography and for the limited set of mammography data available from the authors' patient sample. Exponents from the segmented bCT images (average value: 2.06) were systematically slightly higher than bCT images, with substantial correlation between the two (r=0.84). PMID:18975714

Metheany, Kathrine G; Abbey, Craig K; Packard, Nathan; Boone, John M

2008-10-01

346

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

347

SPECT/CT and tumour imaging.  

PubMed

Scintigraphic techniques are sensitive imaging modalities in the diagnosis and follow-up of cancer patients providing the functional and metabolic activity characteristics of the tumour. Hybrid SPECT/CT improves the diagnostic accuracy of these well-established imaging techniques by precise anatomical localization and characterization of morphological findings, differentiation between foci of physiological and pathological tracer uptake, resulting in a significant impact on patient management and more definitive interpretations. The use of SPECT/CT has been studied in a variety of applications in tumour imaging which are reviewed in this article. By combining functional and anatomical information in a single imaging session, SPECT/CT has become a one-stop cancer imaging modality. PMID:23990144

Abikhzer, Gad; Keidar, Zohar

2014-05-01

348

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

2011-06-01

349

Sinus pericranii: clinical and imaging findings in two cases of spontaneous partial thrombosis.  

PubMed

Sinus pericranii is an unusual venous anomaly characterized by communication of pericranial varicosities with an underlying dural sinus. We report two cases of spontaneous partial thrombosis of sinus pericranii presenting as focally tender, nonreducible mass lesions different in character from the baseline venous abnormality. CT, CT angiography, and CT venography (CTV) were performed in both cases. CTV was essential in depicting thrombi within the varicosities. MR (in one case) demonstrated the anomaly well, but the thrombus was not evident. Conservative therapy was instituted in both cases. PMID:14729540

Carpenter, Jeffrey S; Rosen, Charles L; Bailes, Julian E; Gailloud, Philippe

2004-01-01

350

Spinal Epidural Extraskeletal Ewing Sarcoma: MR Findings in Two Cases  

Microsoft Academic Search

Summary: We report the CT myelography and MR find- ings of two cases of extraskeletal Ewing sarcoma involving the spinal epidural and paravertebral spaces in a middle- aged man (case 1) and a young woman (case 2). In both cases CT myelography showed epidural and paravertebral masses on one side, with widening of the ipsilateral neural foramina at the C5-C6

Ji Hoon Shin; Ho Kyu Lee; Seung Chul Rhim; Kyung-Ja Cho; Choong Gon Choi; Dae Chul Suh

351

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

352

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

353

Computational investigation of unusual behavior in certain capillary tubes  

SciTech Connect

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

Brady, Victor; Concus, Paul; Finn, Robert

2004-03-12

354

The cruel and unusual phenomenology of solitary confinement  

PubMed Central

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

Gallagher, Shaun

2014-01-01

355

The cruel and unusual phenomenology of solitary confinement.  

PubMed

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

Gallagher, Shaun

2014-01-01

356

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

357

An unusual case of smothering by a medical nebulizer.  

PubMed

The following report describes an unusual case of smothering by a medical nebulizer of a psychiatric in-patient and discusses the manner of death. A 43-year-old man, with previous medical history of paranoia was hospitalized at a psychiatric department because of a suicide attempt. He was found dead by the medical staff in the seclusion room. The patient is known suffering from asthma attacks treated by Ventoline(®) spray. Autopsy findings showed a ventoline's nebulizer impacting within the pharynx and in the upper part of oesophagus. These findings were compatible with a death by smothering. Smothering is an uncommon cause of suicide and is particularly observed in psychiatric patient. Suicidal death is established by the study of the circumstances and autopsy finding. This paper highlights the importance of a closer psychiatric in-patient residing in seclusion room. PMID:23756529

Haj Salem, Nidhal; Aissaoui, Abir; Boughattas, Meriem; Chadly, Ali

2013-07-01

358

The need for skull radiography in patients presenting for CT  

SciTech Connect

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

Tress, B.M.

1983-01-01

359

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

PubMed

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

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

2013-01-01

360

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

361

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

362

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

NASA Astrophysics Data System (ADS)

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.; Zarse, Chad A.; Jackson, Molly E.; Lingeman, James E.; McAteer, James A.

2007-04-01

363

Cerebral aneurysm exclusion by CT angiography based on subarachnoid hemorrhage pattern: a retrospective study  

PubMed Central

Background To identify patients with spontaneous subarachnoid hemorrhage for whom CT angiography alone can exclude ruptured aneurysms. Methods An observational retrospective review was carried out of all consecutive patients with non-traumatic subarachnoid hemorrhage who underwent both CT angiography and catheter angiography to exclude an aneurysm. CT angiography negative cases (no aneurysm) were classified according to their CT hemorrhage pattern as "aneurismal", "perimesencephalic" or as "no-hemorrhage." Results Two hundred and forty-one patients were included. A CT angiography aneurysm detection sensitivity and specificity of 96.4% and 96.0% were observed. All 35 cases of perimesencephalic or no-hemorrhage out of 78 CT angiography negatives also had negative angiography findings. Conclusions CT angiography is self-reliant to exclude ruptured aneurysms when either a perimesencephalic hemorrhage or no-hemorrhage pattern is identified on the CT within a week of symptom onset.

2011-01-01

364

CT Perfusion of the Head  

MedlinePLUS

... Overview In computed tomography (CT) perfusion imaging, special computer software converts contrast enhanced CT images of the ... scanning combines special x-ray equipment with sophisticated computers to produce multiple images or pictures of the ...

365

Cranial computed tomography scan findings in head trauma patients in Enugu, Nigeria  

PubMed Central

Background: The choice of radiological investigations in head trauma in Africa is influenced by factors such as cost. Some patients who require computed tomography (CT) scan elsewhere are either managed blindly or do not present for it at the appropriate time. This paper evaluates the CT scan findings as they are obtained in cases of head trauma in a region of Nigeria. Methods: Prospectively recorded data of all head injury patients who presented for CT scan between January 2009 and April 2010 at Memfys Hospital for Neurosurgery (MHN), Enugu, Nigeria, were analyzed. Mobile CereTom 8-Slice CT was used in all cases. New and follow-up cases were included. Results: There were 204 CT scans for head trauma (171 new, 33 follow-up), accounting for about 34% of all head CT scans performed with this unit. The male to female ratio was 3.5:1. About 33.9% of the patients were in the third and fourth decades of life. In 19.9% cases, CT was unremarkable, while 80.1% cases had abnormal CT findings. The CT diagnosis was not in keeping with the indication of head trauma in 7%, and 13% had more than one finding. The most common CT findings were: subdural hematoma 30%, cerebral contusions and edema 30.7%, skull fractures 23.4% and extradural hematoma 8.0%. About 64% of the CT findings required surgical interventions. The overall mortality was 11.1%, but amongst the 137 patients who had abnormal CT findings, it was 13.9%. Conclusion: The high yield and diversity of CT scan findings in head trauma patients support the indication for the appropriate use of CT in diagnosis and management of head trauma even in developing countries.

Ohaegbulam, Samuel C.; Mezue, Wilfred C.; Ndubuisi, Chika A.; Erechukwu, Uwadiegwu A.; Ani, Chinenye O.

2011-01-01

366

Unusual raptor nests around the world  

USGS Publications Warehouse

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

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

2009-01-01

367

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

368

An unusual cluster of circumscribed juvenile pityriasis rubra pilaris cases.  

PubMed

Circumscribed juvenile pityriasis rubra pilaris (PRP) is an uncommon dermatosis. We describe the unusual clustering of circumscribed juvenile PRP cases in our pediatric dermatology clinic in 2011. A retrospective chart review was done of patients presenting during the summer of 2011 with classic findings of circumscribed juvenile PRP. Clinical data including past medical and family history, presenting symptoms, infectious disease history and evaluation, biopsy results, and management were recorded. Seven patients, ages 5 to 19 years, all had strikingly similar skin findings of pink to hyperpigmented, well-defined, scaly papules and plaques on their elbows, knees, dorsal hands, ankles, and Achilles tendons. Four of the seven also had palmoplantar involvement. Four were sibling pairs and the other three were unrelated. Streptococcus pyogenes infection was suspected as a trigger in four of the patients. The unusual clustering of this uncommon disease, along with the occurrence in two sibling pairs, suggests that a genetic susceptibility unmasked by an infectious agent may play a role in its pathogenesis. PMID:24456130

Martin, Kari L; Holland, Kristen E; Lyon, Valerie; Chiu, Yvonne E

2014-01-01

369

Unusual Presentation of Cystic Lymphangioma of the Gallbladder  

PubMed Central

Cystic lymphangioma of the gallbladder is quite a rare tumor with only a few cases having been reported in the literature. We describe here a rare case of cystic lymphangioma of the gallbladder, which was unusual in that the patient presented with biliary pain and an abnormal liver test. Ultrasonography and computed tomography of the abdomen showed a multi-septated cystic mass in the gallbladder fossa and an adjacent compressed gallbladder. Endoscopic retrograde cholangiography showed there was no communication between the bile tract and the lesion, and there were no other abnormal findings with the exception of a laterally compressed gallbladder. After performing endoscopic sphincterotomy, a small amount of sludge was released from the bile duct. The histological findings were consistent with a cystic lymphangioma originating from the subserosal layer of the gallbladder. This unusual clinical presentation of a gallbladder cystic lymphangioma was attributed to biliary sludge, and this was induced by gallbladder dysfunction that was possibly from compression of the gallbladder due to the mass.

Woo, Yong Sik; Kim, Kyung-Yup; Oh, Won Taek; Kim, Youn Hwa

2007-01-01

370

The colchicine derivative CT20126 shows a novel microtubule-modulating activity with apoptosis  

PubMed Central

New colchicine analogs have been synthesized with the aim of developing stronger potential anticancer activities. Among the analogs, CT20126 has been previously reported to show immunosuppressive activities. Here, we report that CT20126 also shows potential anticancer effects via an unusual mechanism: the modulation of microtubule integrity and cell cycle arrest at the G2/M phase before apoptosis. When we treated COS-7 cells with CT20126 (5???), the normal thread-like microtubules were disrupted into tubulin dimers within 10?min and thereafter repolymerized into short, thick filaments. In contrast, cells treated with the same concentration of colchicine exhibited microtubule depolymerization after 20?min and never underwent repolymerization. Furthermore, optical density (OD) analysis (350?nm) with purified tubulin showed that CT20126 had a higher repolymerizing activity than that of Taxol, a potent microtubule-polymerizing agent. These results suggest that the effects of CT20126 on microtubule integrity differ from those of colchicine: the analog first destabilizes microtubules and then stabilizes the disrupted tubulins into short, thick polymers. Furthermore, CT20126 induced a greater level of apoptotic activity in Jurkat T cells than colchicine (assessed by G2/M arrest, caspase-3 activation and cell sorting). At 20?n?, CT20126 induced 47% apoptosis among Jurkat T cells, whereas colchicine induced only 33% apoptosis. Our results suggest that the colchicine analog CT20126 can potently induce apoptosis by disrupting microtubule integrity in a manner that differs from that of colchicine or Taxol.

Kim, Sung-Kuk; Cho, Sang-Min; Kim, Ho; Seok, Heon; Kim, Soon-Ok; Kyu Kwon, Taeg; Chang, Jong-Soo

2013-01-01

371

An unusual manifestation of renal osteodystrophy.  

PubMed

Besides the more frequent aspects, an unusual manifestation of renal osteodystrophy occurred in a 19-year-old man on regular hemodialysis treatment. About 6 years after the start of hemodialysis, the patient, who had severe osteodystrophy, presented a brown tumor, localized to the jaw, which caused a serious deformity of the face. Pharmacological treatment for hyperparathyroidism did not reduce the volume of the mass. Only total surgical removal gave long-lasting success. Brown tumor is an unusual but serious complication of renal bone disease which can be treated successfully by surgical removal of the tumoral mass and by pharmacological treatment for hyperparathyroidism. PMID:6728088

Catizone, L; Casolino, D; Santoro, A; Casanova, S; Cerasoli, P T; Zucchelli, P

1984-01-01

372

Multidetector CT angiography in the evaluation of acute mesenteric ischemia.  

PubMed

The aim of this study was to determine the accuracy of multidetector row CT angiography in the diagnosis of acute mesenteric ischemia. Ninety-three consecutive studies on 91 patients with clinically suspected acute mesenteric ischemia underwent abdominal CT angiography as the first, and usually the sole, diagnostic procedure. CT was performed with a multidetector 16-row CT system from the level of the diaphragm to the pelvis in two phases: early arterial and late portal phase. CT examinations were reviewed by the duty radiologist. Final diagnosis was established by a senior radiologist. CTA was diagnostic in 92 studies. Mesenteric ischemia was diagnosed in 18 patients, 14 of them were of the thromboembolic type and four from the nonocclusive type. Positive CTA findings were confirmed by surgery in 13 patients and by clinical follow-up in three cases. Other reasons for abdominal pain were diagnosed by CT in 38 patients out of the remaining 74. There were two false positive and two false negative CT results, resulting in an overall accuracy of 95.6%. Multidetector CT angiography is a fast and accurate investigation for the diagnosis of acute mesenteric ischemia and in most cases can be used as the sole diagnostic procedure. PMID:18690454

Ofer, Amos; Abadi, Sobhi; Nitecki, Samy; Karram, Tony; Kogan, Igor; Leiderman, Maxim; Shmulevsky, Pavel; Israelit, Shlomi; Engel, Ahuva

2009-01-01

373

Thoracic endometriosis syndrome: CT and MRI features.  

PubMed

Thoracic endometriosis is considered to be rare, but is the most frequent form of extra-abdominopelvic endometriosis. Thoracic endometriosis syndrome affects women of reproductive age. Diagnosis is mainly based on clinical findings, which can include catamenial pneumothorax and haemothorax, non-catamenial endometriosis-related pneumothorax, catamenial haemoptysis, lung nodules, and isolated catamenial chest pain. Symptoms are typically cyclical and recurrent, with a right-sided predominance. Computed tomography (CT) is the first-line imaging method, but is poorly specific; therefore, its main role is to rule out other pulmonary diseases. However, in women with a typical clinical history, some key CT findings may help to confirm this often under-diagnosed syndrome. MRI can also assist with the diagnosis, by showing signal changes typical of haemorrhage within diaphragmatic or pleural lesions. PMID:24331768

Rousset, P; Rousset-Jablonski, C; Alifano, M; Mansuet-Lupo, A; Buy, J-N; Revel, M-P

2014-03-01

374

MRI, Enhanced CT, and FDG PET/CT in Basal Cell Carcinoma of the Prostate.  

PubMed

Primary basal cell carcinoma of the prostate is a very rare neoplasm with a good prognosis. A 55-year-old man presented with urinary frequency for 2 months. Serum prostate-specific antigen level was normal. T2-weighted MR images showed an inhomogeneously hyperintense tumor in the prostate. Enhanced CT showed heterogeneous enhancement of the tumor. FDG PET/CT showed strong FDG uptake of the tumor with SUVmax of 14.1. Prostate biopsy findings revealed basal cell carcinoma with high proliferation index. PMID:24152659

Dong, Aisheng; Zuo, Changjing; Lu, Jianping; Wang, Yang

2014-08-01

375

Retropharyngeal Effusion in Acute Calcific Prevertebral Tendinitis: Diagnosis with CT and MR Imaging  

Microsoft Academic Search

Summary: Three patients with the diagnosis of acute cal- cific prevertebral tendinitis underwent CT or a combina- tion of CT and MR imaging, which showed previously described findings of calcifications within the tendons of the longus colli muscles. In addition, however, we detected a retropharyngeal effusion in all three patients. The im- portance of this finding lies in the need

James D. Eastwood; Patricia A. Hudgins; David Malone

376

Radiologic Investigation of Renal Colic: Unenhanced Helical CT Compared with Excretory Urography  

Microsoft Academic Search

SUBJECTS AND METHODS. Fifty-three of 70 consecutive patients with acute signs of renal colic were prospectively examined with unenhanced helical CT, which was followed immediately by excretory urography. Two radiologists who were unaware of the findings in- dependently interpreted these examinations to determine the presence or absence of ureteral obstruction. On all CT scans that had positive findings for ureteral

S. Sourtzis; J. F. Thibeau; N. Oamry; A. Raslan; M. Vandendris; M. Bellemans

377

Diagnostic value of CT in patients with huntington's chorea and their offspring  

Microsoft Academic Search

Striatal and cortical atrophy are significant features in the pathology of Huntington's chorea (HCh). A correlative study revealed that the CT findings of atrophy in HCh (8 patients) parallel the clinical and neurophysiological findings. In offspring (8 subjects) of HCh patients, however, the CT changes were insignificant although neurophysiological data were already suspicious in four of them. One patient with

G. Oepen; Ch. Ostertag

1981-01-01

378

Imaging features of rhinosporidiosis on contrast CT  

PubMed Central

Context: Rhinosporidiosis is a chronic granulomatous disease endemic in certain regions of India. Computed tomography (CT) imaging appearances of rhinosporidiosis have not been previously described in the literature. Aims: To study imaging features in rhinosporidiosis with contrast-enhanced CT and elucidate its role in the evaluation of this disease. Materials and Methods: Sixteen patients with pathologically proven rhinosporidiosis were included in the study. Contrast-enhanced CT images were analyzed retrospectively and imaging findings were correlated with surgical and histopathologic findings. Results: A total of 29 lesions were found and evaluated. On contrast-enhanced CT, rhinosporidiosis was seen as moderately enhancing lobulated or irregular soft tissue mass lesions in the nasal cavity (n = 13), lesions arising in nasal cavity and extending through choana into nasopharynx (n = 5), pedunculated polypoidal lesions arising from the nasopharyngeal wall (n = 5), oropharyngeal wall (n = 2), larynx (n = 1), bronchus (n = 1), skin and subcutaneous tissue (n = 2). The inferior nasal cavity comprising nasal floor, inferior turbinate, and inferior meatus was the most common site of involvement (n = 13). Surrounding bone involvement was seen in the form of rarefaction (n = 6), partial (n = 3) or complete erosion (n = 3) of inferior turbinate, thinning of medial maxillary wall (n = 2), and septal erosion (n = 2). Nasolacrimal duct involvement was seen in four cases. Conclusions: Contrast-enhanced CT has an important role in delineating the site and extent of the disease, as well as the involvement of surrounding bone, nasolacrimal duct and tracheobronchial tree. This provides a useful roadmap prior to surgery.

Prabhu, Shailesh M; Irodi, Aparna; Khiangte, Hannah L; Rupa, V; Naina, P

2013-01-01

379

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

380

Unusual Presentation of Chronic Eosinophilic Pneumonia with "Reversed Halo Sign": A Case Report  

PubMed Central

The reversed halo sign (RHS) may sometimes be seen in patients with cryptogenic organizing pneumonia (COP), but is rarely associated with other diseases. Herein, we present a case of a 21-year-old woman with chronic eosinophilic pneumonia, with high resolution computed tomography (HRCT) finding of RHS. This is an unusual and rare presentation of chronic eosinophilic pneumonia.

Gholamnejad, Mahdia; Rezaie, Nader

2014-01-01

381

On the unusual characteristics of the diamonds from Letšeng-la-Terae kimberlites, Lesotho  

NASA Astrophysics Data System (ADS)

The Letšeng-la-Terae kimberlites are situated 3100 m above sea level in the Maloti Mountains of Lesotho, southern Africa. The principal economic bodies are two Late Cretaceous, low grade, 1-3.5 carats/hundred ton (cpht), kimberlite pipes that host high-value diamonds realising US 2000-2500/carat (/ct) in 2008 terms. Locally, the larger kimberlite body is referred to as the Main Pipe (17.2 ha) and the smaller one is called the Satellite Pipe (5.2 ha). These pipes, and their associated eluvial and proximal alluvial deposits, are renowned for yielding large, "D" colour, gem quality diamonds, including + 100 carat (ct) stones. Earlier artisanal effort (1959-1977) and formal mining (1977-1982) produced 335,000 carats (cts), including the 601 ct Lesotho Brown in 1968. In 2003, Letšeng Diamonds Limited re-commenced mining operations and had produced 265,000 cts by the end of July 2008, including 24 + 100 ct diamonds, the largest of which was the 603 ct Lesotho Promise. We report here on the unusual characteristics of the Letšeng diamond population that include: 75% gem quality that is more commonly associated with alluvial diamond deposits, large average stone size of ca. 1 carat/stone (ct/stn) that is also more typical of certain alluvial diamond placers, high-yielding, rounded to flattened irregular, resorbed dodecahedral shapes (Main Pipe 67% and Satellite Pipe 87%) with subordinate dodecahedral macle (Main Pipe 32% and Satellite Pipe 12%) and broken (ca. 1%) forms. In both pipes the octahedral component is virtually absent (< 0.1%), economically favourable colour mix (ca. 33% white colour diamonds in both pipes), abundance of nitrogen-free, "D" colour, Type IIa diamonds that dominate the internationally recognised "special" stone size fraction which covers all diamonds larger than + 10.8 cts (Main Pipe 32% and Satellite Pipe 51%). During 2008, these larger, "special" diamonds commanded prices in excess of US 15,000/ct, contributing ca. 75% of the revenue generated by the Letšeng mine. Furthermore, of the 24 + 100 ct diamonds recovered between November 2003 and July 2008, 18 (75%) were Type IIa "D" colour diamonds that also fetched prices mostly in excess of US 25,000/ct. Therefore the Type IIa diamonds boost significantly the revenue per unit measure (in this case, the US$/ton) of the Letšeng-la-Terae pipes, making these low grade kimberlites economic to mine.

Bowen, Debbie C.; Ferraris, Ray D.; Palmer, Claire E.; Ward, John D.

2009-11-01

382

An unusual presentation of a Gastrointestinal stromal tumour (GIST)  

PubMed Central

Background Gastrointestinal stromal tumours (GIST) are rare tumours, now more frequently identified with the new imaging modalities like computerised tomography (CT) and magnetic resonance imaging (MRI). We report a rare presentation of a GIST with an unusual diagnostic workup in a multidisciplinary setting leading to a definitive diagnosis and treatment. Case presentation A 55-year-old lady was admitted under the general surgeons, with 3-day history of abdominal pain, three-week history of loss of appetite and weight. The patient was sequentially investigated with ultrasonography, computerised tomography and finally selective angiogram in a multidisciplinary setting. The selective angiogram showed a GIST with intratumour bleed, leading to successful surgical excision and being recurrence free at 22 month follow up. Conclusion Clinical presentation of these tumours can be varied and gastrointestinal bleeding is the commonest mode described in the literature. The clinician needs to be aware of much more rare presentations of the GIST including an intra tumour bleed. A structured multidisciplinary approach would lead to successful diagnosis and treatment.

John, Solomon KP; Basu, Sanjoy; Lawrance, Richard J; Davies, Nick

2007-01-01

383

Accuracy of Serial PET-CT Imaging in Systemic Sarcoidosis  

PubMed Central

Positron emission tomography (PET) in combination with computed tomography (PET-CT) is commonly used to identify malignant lesion in the lung. Despite there being only a few reports in literature, PET-CT imaging may have many advantages in the study of sarcoidosis, being useful in the diagnosis as well as in monitoring the response to treatment. The object of this case report is to highlight the clinical utility of integrated PET-CT imaging for evaluation of patients with systemic sarcoidosis and for comparing baseline findings to follow-up readings.

Carbone, Roberto G.; Penna, Daniele; Baughman, Robert P.; Lower, Elyse E.

2014-01-01

384

Os vesalianum pedis detected with bone SPECT/CT.  

PubMed

We present an 18-year-old man with pain at the lateral aspect of his left foot. Radiograph showed abnormal ossicle in the proximal aspect of the left fifth metatarsal tuberosity, which was articulated with the fifth metatarsal and cuboid bones. Bone scintigraphy and SPECT/CT demonstrated increased uptakes at the ossicles in the proximal aspect of both fifth metatarsal bones. CT revealed that the ossicle and the adjacent bones have well-corticated margins. The diagnosis was os vesalianum, a rare accessory bone of the foot. We have reported the SPECT/CT bone scan findings of the os vesalianum. PMID:24300363

Kim, Myoung Hyoun; Kim, Woo Hyoung; Kim, Chang Guhn; Kim, Dae-Weung

2014-02-01

385

Cholesterol granuloma of the petrous apex: CT diagnosis  

SciTech Connect

Cholesterol granuloma of the petrous apex is a readily recognizable and treatable entity that is more common than previously realized. Cholesterol granuloma grows slowly in the petrous apex as a mass lesion until it produces hearing loss, tinnitus, vertigo, and facial twitching. Twelve cases of cholesterol granuloma of the petrous apex are illustrated; ten of these analyzed in detail, especially with respect to CT findings. A sharply and smoothly marginated expansile lesion in the petrous apex, isodense with plain and nonenhancing on CT, is in all probability a cholesterol granuloma. Preoperative recognition by CT is important for planning proper treatment.

Lo, W.W.M.; Solti-Bohman, L.G.; Brackmann, D.E.; Gruskin, P.

1984-12-01

386

Accuracy of Serial PET-CT Imaging in Systemic Sarcoidosis.  

PubMed

Positron emission tomography (PET) in combination with computed tomography (PET-CT) is commonly used to identify malignant lesion in the lung. Despite there being only a few reports in literature, PET-CT imaging may have many advantages in the study of sarcoidosis, being useful in the diagnosis as well as in monitoring the response to treatment. The object of this case report is to highlight the clinical utility of integrated PET-CT imaging for evaluation of patients with systemic sarcoidosis and for comparing baseline findings to follow-up readings. PMID:24987568

Carbone, Roberto G; Penna, Daniele; Baughman, Robert P; Lower, Elyse E

2014-01-01

387

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

388

Spleen in Hodgkin disease: diagnostic value of CT  

SciTech Connect

Findings of CT of the spleen were compared with those of histologic examination in 35 patients who had Hodgkin disease. CT provides a simple way to calculate splenic size. This index is also of value in the assessment of the histologic state of the spleen. An accuracy rate of 91%, specificity of 94%, and a sensitivity of 89% in diagnosing splenic localization of lymphoma was found in this study.

Strijk, S.P.; Wagener, D.J.T.; Bogman, M.J.J.T.; de Pauw, B.E.; Wobbes, T.

1985-03-01

389

77 FR 15356 - Expansion of Foreign-Trade Zone 71; Windsor Locks, CT  

Federal Register 2010, 2011, 2012, 2013

...1818] Expansion of Foreign-Trade Zone 71; Windsor Locks, CT Pursuant to its authority under the Foreign-Trade Zones Act...Board's regulations; and, Whereas, the Board adopts the findings and recommendations of the examiner's report, and finds...

2012-03-15

390

Temporal bone computed tomography findings in bilateral sensorineural hearing loss  

PubMed Central

AIM—To 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.?METHODS—Retrospective 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.?RESULTS—A total of 33 (28.4%) CT scans were identified as abnormal. Children with profound and/or progressive hearing loss and/or craniofacial abnormalities were more likely to have an abnormal CT scan and together accounted for 25 abnormal CT scans. Sex, consanguineous parents, or family history of SNHL were not associated with CT findings. Dilated vestibular aqueduct was significantly correlated with the presence of progressive SNHL.?CONCLUSIONS—All children with SNHL should undergo radiological investigation of the petrous bones/inner ear; abnormalities are more likely to be found in cases with craniofacial abnormalities, or profound or progressive hearing loss. The decision whether to perform a CT or magnetic resonance imaging will depend on scanner availability, expertise, and management considerations, but cochlear implant candidates will require both.??

Bamiou, D; Phelps, P; Sirimanna, T

2000-01-01

391

Segmental lichen planus pigmentosus: An unusual presentation  

PubMed Central

Lichen planus pigmentosus (LPP) is a distinct clinical entity commonly encountered in the Indian population. It is considered a variant of lichen planus (LP). A 40-year-old male presented with asymptomatic hyperpigmented macules in a segmental distribution since 10 years that were clinically and histopathologically suggestive of LPP. We propose the terminology “segmental lichen planus pigmentosus” and report this unusual presentation.

Kumar, Y Hari Kishan; Babu, Anagha Ramesh

2014-01-01

392

The Very Unusual HMXRB HD 34921  

NASA Astrophysics Data System (ADS)

The peculiar system HD 34921/4U 0515+38 is, together with CI Cam, one of the two only HMXRB with a dust shell, typical of B[e] stars. We present here the first high-resolution spectrum of the optical counterpart HD 34921 and show that this system is unusual in many respects and in many ways unique.

Polcaro, V. F.; Norci, L.; Meurs, E. J. A.; Bernabei, S.

393

Epidermodysplasia verruciformis: An early and unusual presentation.  

PubMed

Epidermodysplasia verruciformis is a rare, heritable disease characterized by an unusual susceptibility to infection with specific types of human papillomavirus and a propensity for developing malignant skin tumours. Partial defects in cell-mediated immunity have been demonstrated in this disease. In the present report, a young patient with epidermodysplasia verruciformis who was treated successfully with surgical treatment is described. PMID:21358870

Emsen, Ilteris Murat; Kabalar, M Esref

2010-01-01

394

Unusual case of hypomagnesaemia induced seizures  

PubMed Central

Alterations in electrolyte homeostasis associated with major surgery and critical illness are common but usually non-specific. We report an unusual case of hypomagnesaemia induced seizures in a 73-year-old woman who was recovering from ileal resection and limited right hemicolectomy for small bowel volvulus. Hypomagnesaemia as a de novo cause of seizures is rarely reported.

Pande, Shrikant D; Wee, Chee Keong; Maw, Nyein Nyein

2009-01-01

395

Balloon angioplasty for an unusual aortic coarctation.  

PubMed

Percutaneous balloon angioplasty is an alternative therapy for the treatment of the typical type of coarctation. Its associated morbidity and mortality compares favorably when compared to the standard treatment surgery. While atypical coarctations are rare, the described cases have been treated surgically. We present a case of unusually located aortic coarctation successfully treated with percutaneous balloon angioplasty. PMID:9473198

Poplausky, M R; Rozenbilt, G; Pavlis, M; Rundback, J H

1998-01-01

396

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

397

An unusual oviraptorosaurian dinosaur from China  

Microsoft Academic Search

Oviraptorosaurians are an unusual group of theropod dinosaurs, with highly specialized skulls. Here we report a new oviraptorosaurian, Incisivosaurus gauthieri, gen. et sp. nov., from the lowest part of the Lower Cretaceous Yixian Formation of China. This oviraptorosaurian displays a number of characters closer to more typical theropods, such as a low skull and toothed jaws, thus greatly reducing the

Xing Xu; Yen-Nien Cheng; Xiao-Lin Wang; Chun-Hsiang Chang

2002-01-01

398

Epidermodysplasia verruciformis: An early and unusual presentation  

PubMed Central

Epidermodysplasia verruciformis is a rare, heritable disease characterized by an unusual susceptibility to infection with specific types of human papillomavirus and a propensity for developing malignant skin tumours. Partial defects in cell-mediated immunity have been demonstrated in this disease. In the present report, a young patient with epidermodysplasia verruciformis who was treated successfully with surgical treatment is described.

Emsen, Ilteris Murat; Kabalar, M Esref

2010-01-01

399

Unusual cases from Dubai, United Arab Emirates.  

PubMed

Dubai is one of the small countries of the United Arab Emirates located on the shores of the Persian Gulf in the Middle East. This report deals with two deaths: one an unusual method of suicide by hanging and the other, a death under investigation into whether it was accidental or suicidal. PMID:1750386

el Khafief, H

1991-09-01

400

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

401

CT Teaching Files  

NSDL National Science Digital Library

CTisus is a project of the Advanced Medical Imaging Laboratory, and on this site they present their teaching files. The files are divided by organ or body systems (such as Stomach and Neuro), and each division contains from one to forty-two individual files. Each file contains 100 cases, which allow students to see CT scans, courtesy of Dr. Elliot K. Fishman, and diagnose the illness based on what the scan reveals. By clicking the âÂÂDiagnosisâ on/off buttons, they can see the correct diagnosis. This site will be helpful for students in the fields of diagnostic radiographic imaging or radiology to have an understanding of what diseases look like in CT scans, and for teachers who instruct those students to supplement their classroom lectures and activities with these ready-to-use teaching files.

Fishman, Elliot K.

2007-03-09

402

[Kidney spiral CT. Indication, method, results].  

PubMed

The introduction on spiral computed tomography (spiral CT) has vastly enriched the methodological diversity of computer-tomographic scans. It allows for the recording of different perfusion or excretion stages of the kidney parenchyma of the urine draining paths by carrying out long-distance, phase-identical multiple examinations of the retroperitoneum. The description of the findings which are characterized by their local and contrasts behavior is possible. The following report describes the indications and technological process of kidney spiral CT using kidney-typical intravenous contrast media. Special emphasis is put on the advantages and limits of multiple phase spiral CT. Decisive preconditions are: 1. specific clinical query, 2. selection of the corresponding phase contrasts of the kidneys and uretra or bladder, 3. exact technical and temporal adjustment of the acquisition parameters. Scanning times are in the range of seconds. The overall examination can be carried out quick and without any major strain on the part of the patient. A sound proof and a general differentiation of focal kidney lesions can be derived from the acquired data. This is also true for kidneys and ureters findings. Bladder findings can be localized and differentiated according to stage. More than two "spiral acquisitions" should be carried out with re-straint taking exposure to radiation into account. Due to the sound registration of focal lesions, its capability of reproduction and its short-time examination, the spiral CT of the kidneys can be said to be the most effective current scanning method of the retroperitoneum following clinical examinations and sonography. PMID:10384691

Braunschweig, R; Hundt, W; Breiteneder, T; Beilicke, M; Reiser, M

1999-05-01

403

Fine analysis of spontaneous MAGE-C1/CT7-specific immunity in melanoma patients.  

PubMed

Cancer/testis (CT) antigens represent prime candidates for immunotherapy in cancer patients, because their expression is restricted to cancer cells and germ cells of the testis. MAGE-C1/CT7 is a CT antigen that is highly expressed in several types of cancers. Spontaneous occurrence of CT7-specific antibodies was previously detected by SEREX screen in a melanoma patient. However, naturally occurring CT7-specific T-cell responses have thus far not been detected. Peripheral blood mononuclear cells (PBMCs) from 26 metastatic melanoma patients expressing CT7 in their tumor lesions (CT7(+)) were analyzed for CT7-specific T-cell responses using overlapping peptides. CT7-specific CD4(+) T-cell responses were detected in three patients (11.5%). These CT7-specific CD4(+) T-cell responses were detectable in melanoma patients' PBMCs exclusively from preexisting CD45RA(-) memory CD4(+) T-cell pool. Additional CT7-specific memory CD4(+) T-cell responses were detected in CT7(+) melanoma patients after depletion of CD4(+)CD25high Treg cells showing that Treg cells impact on CT7-specific CD4(+) T cells in melanoma patients. CT7-specific CD4(+) T-cell clones were generated and used to define minimal epitopes, restriction elements, and confirm the recognition of naturally processed antigen. Surprisingly, these clones were able to secrete perforin and exert cytotoxicity. This study shows that CT7 can induce specific cellular immunity in melanoma patients. Based on these findings, CT7 will be further explored as a potential vaccine for melanoma immunotherapy. PMID:20696919

Nuber, Natko; Curioni-Fontecedro, Alessandra; Matter, Claudia; Soldini, Davide; Tiercy, Jean Marie; von Boehmer, Lotta; Moch, Holger; Dummer, Reinhard; Knuth, Alexander; van den Broek, Maries

2010-08-24

404

Fine analysis of spontaneous MAGE-C1/CT7-specific immunity in melanoma patients  

PubMed Central

Cancer/testis (CT) antigens represent prime candidates for immunotherapy in cancer patients, because their expression is restricted to cancer cells and germ cells of the testis. MAGE-C1/CT7 is a CT antigen that is highly expressed in several types of cancers. Spontaneous occurrence of CT7-specific antibodies was previously detected by SEREX screen in a melanoma patient. However, naturally occurring CT7-specific T-cell responses have thus far not been detected. Peripheral blood mononuclear cells (PBMCs) from 26 metastatic melanoma patients expressing CT7 in their tumor lesions (CT7+) were analyzed for CT7-specific T-cell responses using overlapping peptides. CT7-specific CD4+ T-cell responses were detected in three patients (11.5%). These CT7-specific CD4+ T-cell responses were detectable in melanoma patients’ PBMCs exclusively from preexisting CD45RA? memory CD4+ T-cell pool. Additional CT7-specific memory CD4+ T-cell responses were detected in CT7+ melanoma patients after depletion of CD4+CD25high Treg cells showing that Treg cells impact on CT7-specific CD4+ T cells in melanoma patients. CT7-specific CD4+ T-cell clones were generated and used to define minimal epitopes, restriction elements, and confirm the recognition of naturally processed antigen. Surprisingly, these clones were able to secrete perforin and exert cytotoxicity. This study shows that CT7 can induce specific cellular immunity in melanoma patients. Based on these findings, CT7 will be further explored as a potential vaccine for melanoma immunotherapy.

Curioni-Fontecedro, Alessandra; Matter, Claudia; Soldini, Davide; Tiercy, Jean Marie; von Boehmer, Lotta; Moch, Holger; Dummer, Reinhard; Knuth, Alexander; van den Broek, Maries

2010-01-01

405

Multidetector CT of the coronary arteries and aortic root in a pediatric patient with homozygous familial hypercholesterolemia – correlation with invasive coronary angiography  

Microsoft Academic Search

Sixteen slice multidetector cardiac CT findings of a homozygous familial hypercholesterolemia pediatric patient are presented. Multidetector cardiac CT followed by invasive coronary angiography depicted a variety of diagnostic findings involving the aortic root and coronary arteries. This case illustrates the full capabilities of multidetector cardiac CT in monitoring aortic root and coronary artery disease in pediatric patients with homozygous familial

Eduard Ghersin; Ahuva Engel; Diana Litmanovich; Jonathan Lessick; Amos Ofer; Robert Dragu; Shmuel Rispler; Avraham Lorber

2005-01-01

406

Pulmonary multislice computed tomography findings in acute aortic dissection  

PubMed Central

Objective To document the type and incidence of pulmonary multislice computed tomography (CT) findings at presentation in patients with acute aortic dissection. Materials and methods Multidetector CT scans of 36 patients with a diagnosis of acute aortic dissection or intramural hematoma were retrospectively reviewed. Results Pleural effusion, dependent stasis, mosaic attenuation, interlobular septal thickening, thickening of the peribronchovascular interstitium, vascular enlargement, compression atelectasis were common findings. Additionally air trapping, emphysema, consolidation, nodules, bronchiectasis or scarring were also noted. Conclusions Various pulmonary imaging findings may accompany acute aortic dissection. These findings and their clinical significance should be further investigated.

Okur, Aysegul; Sahin, Sinan

2012-01-01

407

Distal patellar tendinosis: an unusual form of jumper's knee.  

PubMed

Jumper's knee is a common problem in athletes participating in sports that involve running and jumping. Typically activity related pain is felt at the proximal insertion of the patellar tendon. Symptoms and findings in the more distal parts of the patellar tendon are unusual. All of the patients in this retrospective study were active athletes suffering from distal patellar tendinosis. There were 19 men and four women. The mean age of the patients was 24 years (range 12-32). All of the patients were operated on after conservative treatment lasting for an average of 23 months had failed. After a mean postoperative follow-up of 42 months 21 of the knees were rated good meaning that the athlete had returned to the prior level of activity without any symptoms. In three knees the result was fair as the patients benefited from the operation but there were some remaining symptoms. No poor results were reported. All patients were able to return to their previous level of sports 8-12 weeks after surgery. Operative treatment seems to give good results in most cases after unsuccessful conservative treatment of the unusual distal patellar tendinosis in athletes. PMID:16823589

Sarimo, Janne; Sarin, Jussi; Orava, Sakari; Heikkilä, Jouni; Rantanen, Jussi; Paavola, Mika; Raatikainen, Timo

2007-01-01

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

Neuroimaging findings in macrocephaly-capillary malformation: a longitudinal study of 17 patients.  

PubMed

Here, we report the neuroimaging findings and neurological changes in 17 unpublished patients with Macrocephaly-Capillary Malformation (M-CM). This syndrome has been traditionally known as Macrocephaly-Cutis Marmorata Telangiectatica Congenita (M-CMTC), but we explain why M-CM is a more accurate term for this overgrowth syndrome. We analyzed the 17 patients with available brain MRI or CT scans and compared their findings with features identified by a comprehensive review of published cases. White matter irregularities with increased signal on T2-weighted images were commonly observed findings. A distinctive feature in more than half the patients was cerebellar tonsillar herniation associated with rapid brain growth and progressive crowding of the posterior fossa during infancy. In four such cases, we confirmed that the tonsillar herniation was an acquired event. Concurrently, with the development of these findings, ventriculomegaly (frequently obstructive) and dilated dural venous sinuses were observed in conjunction with prominent Virchow-Robin spaces in many of those in whom cerebellar tonsil herniation had developed. We postulate that this constellation of unusual features suggests a dynamic process of mechanical compromise in the posterior fossa, perhaps initiated by a rapidly growing cerebellum, which leads to congestion of the venous drainage with subsequently compromised cerebrospinal fluid reabsorption, all of which increases the posterior fossa pressure and leads to acquired tonsillar herniation. We make a distinction between congenital Chiari I malformation and acquired cerebellar tonsil herniation in this syndrome. We also observed numerous examples of abnormal cortical morphogenesis, including focal cortical dysplasia, polymicrogyria which primarily involved the perisylvian and insular regions, and cerebral and/or cerebellar asymmetric overgrowth. Other findings included a high frequency of cavum septum pellucidum or vergae, thickened corpus callosum, prominent optic nerve sheaths and a single case of venous sinus thrombosis. One patient was found to have a frontal perifalcine mass resembling a meningioma at age 5 years. This is the second apparent occurrence of this specific tumor in M-CM. PMID:18000912

Conway, Robert L; Pressman, Barry D; Dobyns, William B; Danielpour, Moise; Lee, John; Sanchez-Lara, Pedro A; Butler, Merlin G; Zackai, Elaine; Campbell, Lindsey; Saitta, Sulagna C; Clericuzio, Carol L; Milunsky, Jeff M; Hoyme, H Eugene; Shieh, Joseph; Moeschler, John B; Crandall, Barbara; Lauzon, Julie L; Viskochil, David H; Harding, Brian; Graham, John M

2007-12-15

410

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

411

Chest CT Features of North American Paragonimiasis  

PubMed Central

OBJECTIVE The purpose of this study was to characterize the chest CT findings of North American paragonimiasis due to Paragonimus kellicotti in the largest (to our knowledge) case series reported to date and to compare the findings with those reported for paragonimiasis infections in other regions. MATERIALS AND METHODS A retrospective review was performed of chest CT examinations of eight patients with North American paragonimiasis treated at our institution between 2006 and 2010. Findings were characterized by site of involvement, including lungs and pleura, heart and pericardium, lymph nodes, and upper abdomen. RESULTS The most common chest CT findings in this case series were pleural effusions and internal mammary and cardiophrenic lymphadenopathy. Pulmonary parenchymal findings included peripheral lung nodules of 1–3.5 cm in size with surrounding ground-glass opacity; many nodules had a linear track to the pleural surface that may correspond to the worm’s burrow tunnel. Pericardial involvement (5/8 patients) and omental inflammation (5/7 patients), which are uncommon in Asian paragonimiasis, were common in this series. CONCLUSION Pleural and pulmonary features of North American paragonimiasis are generally similar to those reported from Asia. The presence of a track between a pulmonary nodule and the pleura may help distinguish paragonimiasis from mimickers, including chronic eosinophilic pneumonia, tuberculosis, fungal infection, or malignancy. Pericarditis, lymphadenopathy, and omental inflammation were more common in our series than in reports on paragonimiasis from other regions. These differences may be related to the infecting parasite species or to the fact that radiologic examinations in the present series were performed relatively early in the course of infection.

Henry, Travis S.; Lane, Michael A.; Weil, Gary J.; Bailey, Thomas C.; Bhalla, Sanjeev

2013-01-01

412

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

413

Unusually large sialolith of Wharton's duct  

PubMed Central

The formation of calcific concretions in the salivary duct or glands is a common disorder, especially in the submandibular glands. Most of the salivary calculi are small in size, in contrast to those that reach several centimeters, which are reported as megaliths or giant calculi in the literature. They may occur in any of the salivary gland ducts but are most common in Wharton's duct and the submandibular gland. This report presents clinical and radiographical sign of an unusually large sialolith. There was painless swelling on the floor of the edentulous mouth and patient was unaware of it. Radiographical examination revealed large irregular radio-opaque mass superimposed on right canine and premolar areas. This case report describes a patient presenting with an unusually large submandibular gland duct sialolith, the subsequent patient management, the aetiology, diagnosis and its treatment.

Iqbal, Ali; Gupta, Anup K.; Natu, Subodh S.; Gupta, Atul K.

2012-01-01

414

18F-FDG PET/CT imaging of extensive systemic sarcoidosis with epididymal involvement.  

PubMed

Sarcoidosis rarely involves the male reproductive tract. We present an unusual case of extensive systemic sarcoidosis with epididymal involvement. The ¹?F-FDG PET/CT demonstrated extensive foci of hypermetabolic activity involving multiple lymph nodes, liver, epididymides, muscles, and subcutaneous tissues. After immunosuppressive therapy, a follow-up PET scan showed almost complete disappearance of the FDG accumulation except for in the hilar lymph nodes. PMID:23242053

Aga, Fumitoshi; Yamamoto, Yuka; Tanaka, Kenichi; Ono, Yuko; Dobashi, Hiroaki; Nishiyama, Yoshihiro

2013-01-01

415

Senior-Loken syndrome with unusual manifestations.  

PubMed

The Senior-Loken syndrome, also called Hereditary Renal Retinal Dystrophy is a rare disorder that combines a juvenile nephronophthisis-like disease with tapetoretinal degeneration. We are reporting a family in which two, possibly three siblings are affected by this disorder. In addition to these two documented components of the disease, our patients also have unusual manifestations: short stature; skeletal abnormalities in the form of kyphoscoliosis, short metacarpals; and cutis laxa-unreported so far. PMID:11229290

Singh, N P; Anuradha, S; Gupta, S; Rizvi, S N; Arora, R

1998-08-01

416

Segmental lichen planus pigmentosus: An unusual presentation.  

PubMed

Lichen planus pigmentosus (LPP) is a distinct clinical entity commonly encountered in the Indian population. It is considered a variant of lichen planus (LP). A 40-year-old male presented with asymptomatic hyperpigmented macules in a segmental distribution since 10 years that were clinically and histopathologically suggestive of LPP. We propose the terminology "segmental lichen planus pigmentosus" and report this unusual presentation. PMID:24860750

Kumar, Y Hari Kishan; Babu, Anagha Ramesh

2014-04-01

417

[Unusual location of peritoneal inclusion cysts].  

PubMed

The peritoneal inclusion cyst is a rare, probably congenital, pathology of the mesothelium that develops on coelomatic residues. A case is reported of an unusual location of peritoneal cyst, in which the increase in volume, associated with the patient's concern and the presumed anatomic site of the lesion led to its removal by the laparoscopic route. The type of location and the relative inaccuracy of preoperative imaging are discussed. PMID:19859042

Fronticelli Baldelli, C M; Seghesio, R M; Giaccone, M; Scuderi, S; Senetta, R

2009-10-01

418

An unusual combination: lipedema with myiasis.  

PubMed

Lipedema refers to the abnormal deposition of subcutaneous fat causing a striking enlargement of the lower extremities that is out of proportion to the upper body. Most clinicians are unaware of this disease and thus it is seldom diagnosed correctly. Cutaneous myiasis is the infestation of skin by fly larvae. We describe an unusual case of a woman with lipedema who developed cutaneous myiasis. PMID:15153906

Koss, Tamara; Lanatra, Nicole; Stiller, Mathew J; Grossman, Marc E

2004-06-01

419

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

420

Triple teeth: report of an unusual case.  

PubMed

Fusion or synodontia is a union of two or more than two developing teeth. Commonly fusion occurs between teeth of the same dentition, mixed dentition, or between normal and supernumerary teeth. Fused primary teeth present with several clinical problems like caries, periodontal problem, arch asymmetry, delayed eruption, ectopic eruption of succedaneous teeth, aesthetic, and other complications. This paper presents a rare and unusual case of triple teeth in mandibular primary dentition. PMID:23346424

Babaji, Prashant; Prasanth, M A; Gowda, Ajith R; Ajith, Soumya; D'Souza, Henston; Ashok, K P

2012-01-01

421

CT appearances of pleural tumours.  

PubMed

Computed tomography (CT) is the imaging technique of choice for characterizing pleural masses with respect to their location, composition, and extent. CT also provides important information regarding invasion of the chest wall and surrounding structures. A spectrum of tumours can affect the pleura of which metastatic adenocarcinoma is the commonest cause of malignant pleural disease, while malignant mesothelioma is the most common primary pleural tumour. Certain CT features help differentiate benign from malignant processes. This pictorial review highlights the salient CT appearances of a range of tumours that may affect the pleura. PMID:19664483

Salahudeen, H M; Hoey, E T D; Robertson, R J; Darby, M J

2009-09-01

422

18F-FDG PET/CT Imaging In Oncology  

PubMed Central

Accurate diagnosis and staging are essential for the optimal management of cancer patients. Positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro- D-glucose integrated with computed tomography (18F-FDG PET/CT) has emerged as a powerful imaging tool for the detection of various cancers. The combined acquisition of PET and CT has synergistic advantages over PET or CT alone and minimizes their individual limitations. It is a valuable tool for staging and restaging of some tumors and has an important role in the detection of recurrence in asymptomatic patients with rising tumor marker levels and patients with negative or equivocal findings on conventional imaging techniques. It also allows for monitoring response to therapy and permitting timely modification of therapeutic regimens. In about 27% of the patients, the course of managment is changed. This review provides guidance for oncologists/ radiotherapists and clinical and surgical specialists on the use of 18F-FDG PET/CT in oncology.

Almuhaideb, Ahmad; Papathanasiou, Nikolaos; Bomanji, Jamshed

2011-01-01

423

Inhibitory effect of linoleic acid on chain elongation and desaturation of 18?2 c,t isomers in lactating and neonatal rats  

Microsoft Academic Search

The previous studies showed that dietary 18?2 c,t isomers could be chain-elongated and desaturated to produce unusual 20?4 isomers. The present study was undertaken to determine\\u000a the minimal amount of 18?2n?6 required to suppress the chain elongation and desaturation of 18?2 c,t isomers in the lactating and neonatal rats when animals were fed 15% partially hydrogenated canola oil diet containing

Kwok Yiu Kwan; Li-Ya Wang; Kwok Pan Chan; Zhen Yu Chen

1998-01-01

424

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

425

AMP-activated protein kinase phosphorylates CtBP1 and down-regulates its activity  

SciTech Connect

Highlights: ? AMPK phosphorylates CtBP1 on serine 158. ? AMPK-mediated phosphorylation of CtBP1 causes the ubiquitination and nuclear export of CtBP1. ? AMPK downregulates the CtBP1-mediated repression of Bax transcription. -- Abstract: CtBP is a transcriptional repressor which plays a significant role in the regulation of cell proliferation and tumor progression. It was reported that glucose withdrawal causes induction of Bax due to the dissociation of CtBP from the Bax promoter. However, the precise mechanism involved in the regulation of CtBP still remains unclear. In this study, we found that an activated AMP-activated protein kinase (AMPK) phosphorylates CtBP1 on Ser-158 upon metabolic stresses. Moreover, AMPK-mediated phosphorylation of CtBP1 (S158) attenuates the repressive function of CtBP1. We also confirmed that triggering activation of AMPK by various factors resulted in an increase of Bax gene expression. These findings provide connections of AMPK with CtBP1-mediated regulation of Bax expression for cell death under metabolic stresses.

Kim, Jae-Hwan; Choi, Soo-Youn; Kang, Byung-Hee; Lee, Soon-Min [National Creative Research Center for Epigenome Reprogramming Network, Departments of Biomedical Sciences and Biochemistry and Molecular Biology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799 (Korea, Republic of)] [National Creative Research Center for Epigenome Reprogramming Network, Departments of Biomedical Sciences and Biochemistry and Molecular Biology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799 (Korea, Republic of); Park, Hyung Soon; Kang, Gum-Yong; Bang, Joo Young [Center for Biomedical Mass Spectrometry, Diatech Korea Co., Ltd., Seoul (Korea, Republic of)] [Center for Biomedical Mass Spectrometry, Diatech Korea Co., Ltd., Seoul (Korea, Republic of); Cho, Eun-Jung [National Research Laboratory for Chromatin Dynamics, College of Pharmacy, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)] [National Research Laboratory for Chromatin Dynamics, College of Pharmacy, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of); Youn, Hong-Duk, E-mail: hdyoun@snu.ac.kr [National Creative Research Center for Epigenome Reprogramming Network, Departments of Biomedical Sciences and Biochemistry and Molecular Biology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799 (Korea, Republic of) [National Creative Research Center for Epigenome Reprogramming Network, Departments of Biomedical Sciences and Biochemistry and Molecular Biology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799 (Korea, Republic of); WCU Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence and Technology, Seoul National University, Seoul (Korea, Republic of)

2013-02-01

426

Computed tomographic (CT) scans in cerebral palsy (CP)  

Microsoft Academic Search

The CT findings in 120 cerebral palsied children are analysed. The 72.5% positive findings are correlated with the clinical types, as well as the aetiological basis for the cerebral palsy. The spastic type, 83.3% of the total number of children, had the highest positive findings. The yield was increased in children with seizures (91.3%) and those in the postnatal group

T. M. Kolawole; P. J. Patel; A. H. Mahdi

1989-01-01

427

Renal malignant solitary fibrous tumor with single lymph node involvement: report of unusual metastasis and review of the literature  

PubMed Central

Solitary fibrous tumors are rare mesenchymal spindle cell neoplasms that are usually found in the pleura. The kidneys are an uncommon site and only few cases of renal solitary fibrous tumor exhibit malignant behavior metastasizing to the liver, lung, and bone through the hematogenous pathway. Purpose To describe the first case of lymph node metastasis from renal solitary fibrous tumor in order to increase the knowledge about the malignant behavior of these tumors. Patients and methods A 19-year-old female patient had intermittent hematuria for several months without flank pain or other symptoms. A chest and abdomen CT scan was performed and showed a multi-lobed bulky solid mass of 170 × 98 × 120 mm in the left kidney. One day before the surgery, the left renal artery was catheterized and the kidney embolization was performed using a Haemostatic Absorbable Gelatin Sponge and polyvinyl alcohol. We then performed a radical nephrectomy with hilar, para-aortic, and inter-aortocaval lymphadenectomy. Results Estimated intraoperative blood loss was 200 mL and the operative time was 100 minutes. No postoperative complications occurred. The hospital stay was 7 days long. The histological examination was malignant solitary fibrous tumor of the kidney. Cancerous tissue showed cellular atypia, with an increased mitotic index (up to 7 × 10 hpf). Immunohistochemical analysis showed positive results for CD34, BCL2, partial expression of HBME1, and occasionally of synaptophysin. Histological evaluation confirmed the presence of metastasis in one hilar node. The patient did not receive any other therapy. At 30-month follow-up, the patient was in good health and no local recurrence or metastases had occurred. Conclusion This is the first case of lymph node metastasis from a renal solitary fibrous tumor showing unusual malignant behavior; this finding adds new information about the biology and progression of these tumors, which remain unclear.

Mearini, Ettore; Cochetti, Giovanni; Barillaro, Francesco; Fatigoni, Sonia; Roila, Fausto

2014-01-01

428

Branching patterns of the male internal iliac artery: imaging findings  

Microsoft Academic Search

The aim of this study was to establish the imaging findings of the main branching patterns of the male internal iliac arteries,\\u000a using different imaging modalities (angio MR, angio CT and digital angiography). Twenty-one males (mean age 73.2 years) underwent\\u000a imaging evaluation with angio MR, angio CT and digital angiography to define the internal iliac artery anatomy before selective\\u000a embolization of

Tiago Bilhim; Diogo Casal; Andrea Furtado; Diogo Pais; João Erse Goyri O’Neill; João Martins Pisco

2011-01-01

429

[Paleopathologic findings of premature coronal suture closure].  

PubMed

The work describes paleopathologic finding of brachycephaly deformation in 4 adult skulls, caused by premature coronal suture closure. Skulls come from the 35 pieces collection of craniostenoses, found in osteologic collection of 745 skulls from Broumov Ossuary. They were examined by cranioscopy, craniometry, x-ray and CT methods. Presence of brachycephaly in Broumov collection of skulls ant their percentage in the collection of craniosynostoses is discussed in the context with recent clinical data. PMID:19569587

Pospísilová, Blanka; Procházková, Olga; Serbouti, Khalid

2003-01-01

430

Imaging findings in external snapping hip syndrome  

Microsoft Academic Search

We describe a case of external snapping hip diagnosed by dynamic sonography. The case prompted us to retrospectively review\\u000a the imaging findings of children who clinically had presented with snapping hip. From this review we identified the features\\u000a on MRI and CT of either thickening of the iliotibial band or thickening of the anterior edge of the gluteus maximus muscle

Ganesh Krishnamurthy; Bairbre L. Connolly; Unni Narayanan; Paul S. Babyn

2007-01-01

431

The PSF of spiral CT  

Microsoft Academic Search

CT scanners are usually described by their in-plane resolution and slice- sensitivity prole (SSP). Other imaging systems are characterized by their point spread function (PSF). The PSF is an excellent basis for the analysis, design and enhancement of imaging systems. The 3D PSF of CT systems has rarely been considered, and has usually been approximated by a 3D Gaussian. We

Gil Schwarzband; Nahum Kiryati

432

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

2013-10-01

433

Computed Tomography (CT) Scans and Cancer  

MedlinePLUS

... 3 mSv—see Question 7.) As with standard (optical) colonoscopy, a thorough cleansing of the colon is ... combined PET/CT? Combined PET/CT uses two imaging methods, CT and positron emission tomography (PET), in ...

434

Role of the unique N-terminal domain of CtBP2 in determining the subcellular localisation of CtBP family proteins  

PubMed Central

Background CtBP1 and CtBP2 are transcriptional co-repressors that modulate the activity of a large number of transcriptional repressors via the recruitment of chromatin modifiers. Many CtBP-regulated proteins are involved in pathways associated with tumorigenesis, including TGF-? and Wnt signalling pathways and cell cycle regulators such as RB/p130 and HDM2, as well as adenovirus E1A. CtBP1 and CtBP2 are highly similar proteins, although evidence is emerging that their activity can be differentially regulated, particularly through the control of their subcellular localisation. CtBP2s from diverse species contain a unique N-terminus, absent in CtBP1 that plays a key role in controlling the nuclear-cytoplasmic distribution of the protein. Results Here we show that amino acids (a.a.) 4–14 of CtBP2 direct CtBP2 into an almost exclusively nuclear distribution in cell lines of diverse origins. Whilst this sequence contains similarity to known nuclear localisation motifs, it cannot drive nuclear localisation of a heterologous protein, but rather has been shown to function as a p300 acetyltransferase-dependent nuclear retention sequence. Here we define the region of CtBP2 required to co-operate with a.a. 4–14 to promote CtBP2 nuclear accumulation as being within a.a. 1–119. In addition, we show that a.a. 120–445 of CtBP2 can also promote CtBP2 nuclear accumulation, independently of a.a. 4–14. Finally, CtBP1 and CtBP2 can form heterodimers, and we show that the interaction with CtBP2 is one mechanism whereby CtBP1 can be recruited to the nucleus. Conclusion Together, these findings represent key distinctions in the regulation of the functions of CtBP family members that may have important implications as to their roles in development, and cell differentiation and survival.

Bergman, Lee M; Morris, Laila; Darley, Matthew; Mirnezami, Alexander H; Gunatilake, Samal C; Blaydes, Jeremy P

2006-01-01

435

Brief communication: Unusual finding at Pueblo Bonito: Multiple cases of hyperostosis frontalis interna  

Microsoft Academic Search

Hyperostosis frontalis interna (HFI) is a disease characterized by excess bone growth on the inter- nal lamina of the frontal bone and, occasionally, other cranial bones. Although the disease is fairly common in modern populations, its etiology is poorly understood. Hy- perostosis frontalis interna has been identified in antiq- uity, primarily in the Old World, but with a much lower

Dawn M. Mulhern; Cynthia A. Wilczak; J. Christopher Dudar

2006-01-01

436

Brief communication: unusual finding at Pueblo Bonito: multiple cases of hyperostosis frontalis interna.  

PubMed

Hyperostosis frontalis interna (HFI) is a disease characterized by excess bone growth on the internal lamina of the frontal bone and, occasionally, other cranial bones. Although the disease is fairly common in modern populations, its etiology is poorly understood. Hyperostosis frontalis interna has been identified in antiquity, primarily in the Old World, but with a much lower frequency than in modern groups. The purpose of the present study is to report multiple cases of HFI at Pueblo Bonito (Chaco Canyon, New Mexico). Twelve out of 37 adults with observable frontal bones exhibited HFI, ranging from mild to severe, including 11 females and one male. This is the first published case report of HFI in archaeological remains from the New World having a frequency comparable with modern groups. Most archaeological cases of HFI are isolated, so comparative data for multiple cases at one site are rare. The results of this study emphasize the importance of looking for HFI in archaeological remains, although it is rarely observed. Possible genetic and environmental factors for the high frequency of HFI at Chaco Canyon are considered, but additional research is needed to discover the etiology and to better understand why HFI sometimes occurs at modern frequencies in ancient populations. PMID:16444722

Mulhern, Dawn M; Wilczak, Cynthia A; Dudar, J Christopher

2006-08-01

437

Unusual finding of cor triatriatum in a newborn with hypoplastic left heart syndrome  

Microsoft Academic Search

Cor triatriatum is a rare anomaly in which the left atrium is partitioned into 2 distinct chambers with a variable degree of obstruction to left atrial inflow. This anomaly often occurs in isolation but can occur in combination with other cardiac lesions. The association of cor triatriatum with hypoplastic left heart syndrome has not been reported. We describe a newborn

Benjamin W. Eidem; Frank Cetta

2001-01-01

438

Pituitary involvement in Wegener's granulomatosis: unusual biochemical findings and severe malnutrition  

PubMed Central

Wegener’s granulomatosis (WG) is a systemic disease with a complex genetic background. It is characterised by inflammation of the small blood vessels leading to damage in any number of organs. The common features include granulomatous inflammation of the respiratory tract and kidneys. Most patients have measurable autoantibodies against neutrophil proteinase-3 (Antineutrophil Cytoplasmic Antibody, ANCA). Pituitary involvement is a rare complication of this disease and, when it occurs, diabetes insipidus is the most common manifestation. We describe a 38-year-old female with known long-term WG who presented with partial hypopituitarism, severe malnutrition and ANCA negative status, with a favourable response to steroid pulse therapy.

Jimenez, Carmen Tenorio; Valdivieso, Amparo Montalvo; Gallardo, Gema Lopez; Mcgowan, Barbara

2011-01-01

439

Quantifying tumour heterogeneity with CT  

PubMed Central

Abstract Heterogeneity is a key feature of malignancy associated with adverse tumour biology. Quantifying heterogeneity could provide a useful non-invasive imaging biomarker. Heterogeneity on computed tomography (CT) can be quantified using texture analysis which extracts spatial information from CT images (unenhanced, contrast-enhanced and derived images such as CT perfusion) that may not be perceptible to the naked eye. The main components of texture analysis can be categorized into image transformation and quantification. Image transformation filters the conventional image into its basic components (spatial, frequency, etc.) to produce derived subimages. Texture quantification techniques include structural-, model- (fractal dimensions), statistical- and frequency-based methods. The underlying tumour biology that CT texture analysis may reflect includes (but is not limited to) tumour hypoxia and angiogenesis. Emerging studies show that CT texture analysis has the potential to be a useful adjunct in clinical oncologic imaging, providing important information about tumour characterization, prognosis and treatment prediction and response.

Miles, Kenneth A.

2013-01-01

440

Quantifying tumour heterogeneity with CT.  

PubMed

Heterogeneity is a key feature of malignancy associated with adverse tumour biology. Quantifying heterogeneity could provide a useful non-invasive imaging biomarker. Heterogeneity on computed tomography (CT) can be quantified using texture analysis which extracts spatial information from CT images (unenhanced, contrast-enhanced and derived images such as CT perfusion) that may not be perceptible to the naked eye. The main components of texture analysis can be categorized into image transformation and quantification. Image transformation filters the conventional image into its basic components (spatial, frequency, etc.) to produce derived subimages. Texture quantification techniques include structural-, model- (fractal dimensions), statistical- and frequency-based methods. The underlying tumour biology that CT texture analysis may reflect includes (but is not limited to) tumour hypoxia and angiogenesis. Emerging studies show that CT texture analysis has the potential to be a useful adjunct in clinical oncologic imaging, providing important information about tumour characterization, prognosis and treatment prediction and response. PMID:23545171

Ganeshan, Balaji; Miles, Kenneth A

2013-01-01

441

Unusual presentation of a scrotal tumour.  

PubMed

A 59-year-old man had a wide excision of the right-sided scrotal cancer in the neck of the scrotum. On dissection it became apparent that the tumour had developed a blood supply from the right spermatic cord. Histology revealed G2T2 squamous cell carcinoma. A biopsy from an abnormal skin area from the opposite groin reported chronic folliculitis. He underwent an ultrasound scanning of the groin and fine-needle aspiration, which did not show any suspicious features. Follow-up CT of the abdomen and pelvis after 6?weeks did not show any evidence of intra-abdominal lymphadenopathy. Another CT has been arranged within the next 3?months to confirm that the spread of the tumour does not follow the pattern of a testicular tumour. PMID:24879734

Sarkar, Debashis; Parr, Nijel J

2014-01-01

442

CT of the chest can hinder the management of seminoma of the testis; it detects irrelevant abnormalities.  

PubMed

To evaluate the role of chest CT in the initial staging of testicular seminomatous germ cell tumours. All patients referred to Addenbrooke's Hospital with testicular seminoma from 1 January 2000 to 31 December 2005 were included and case notes retrospectively reviewed. One hundred and eighty-two patients with testicular seminoma were identified, with a median age of 37 years (range 19-74). Most patients had stage I disease (86%). Twenty-four patients had abnormal abdominal CT findings. One hundred and fifty-eight had normal abdominal CT findings but, on initial staging, chest CT reported abnormalities in 13 patients, which, on further follow-up CT were deemed to be irrelevant to the diagnosis of seminoma. There was a further patient with a normal CT abdomen in whom chest CT detected obvious metastatic disease, which was seen on chest x-ray. Overall 18 cases required additional investigations and follow-up for abnormalities subsequently found to be benign. There was a false-positive rate of 10% for initial staging with chest CT. This is the largest reported series of staging CT chest in testicular seminoma. In all patients with normal abdominal CT, normal chest x-ray and abnormal chest CT, subsequent follow-up investigations demonstrated that the lung lesions were incidental findings. PMID:17375035

Horan, G; Rafique, A; Robson, J; Dixon, A K; Williams, M V

2007-03-26

443

Pancreas: does hyoscyamine butylbromide increase the diagnostic value of helical CT?  

PubMed

Among 50 patients referred for helical computed tomography (CT) of the pancreas, 24 randomly selected patients received 40 mg of hyoscyamine butylbromide to evaluate whether its administration improved image quality and diagnostic findings. Differences between the groups were not statistically significant. It was therefore concluded that hyoscyamine butylbromide does not contribute a diagnostic advantage at helical CT of the pancreas. PMID:10207493

Aschoff, A J; Görich, J; Sokiranski, R; Rieber, A; Brambs, H J; Krämer, S C

1999-03-01

444

CT and EEG investigations in 100 patients with multiple sclerosis (MS)  

Microsoft Academic Search

100 MS patients were followed up for an average of 5 years. We considered age at onset, duration of the disease, number of attacks, neurological and psychic status, CT and EEG findings and tried correlating the last two with all the previous factors. In remission the most frequent CT abnormality was diffuse atrophy. In acute exacerbations there were 3 possibilities:

A. Quattrini; A. Paggi; A. Ortenzi; P. Di Bella; F. Cianci; L. Forastieri

1981-01-01

445

Iodide and xenon enhancement of computed tomography (CT) in multiple sclerosis (MS)  

Microsoft Academic Search

The characteristic findings on computed tomography (CT) in multiple sclerosis (MS) are discussed. In a series of 49 cases plain CT was normal in 21 (43%), cerebral atrophy alone was present in 17 (35%) and plaques were visible in 11 (23%). These were most often adjacent to the lateral ventricles (14 plaques) and in the parietal white matter (10 plaques).

E. W. Radue; B. E. Kendall

1978-01-01

446

Diagnosis of Bowel Infarction: A Comparison of Plain Films and CT Scans in 23 Cases  

Microsoft Academic Search

We retrospectively reviewed abdominal CT and plain film findings in 23 proved cases of mesenteric infarction to compare the value of the two techniques. Criteria considered specific for infarction on CT were identified in nine (39%) of 23 patients and comprised pneumatosis in seven patients (30%), mesenteric or portal venous gas in three patients (13%), and focally thick-walled bowel in

Michael J. Smerud; C. Daniel Johnson; David H. Stephens

447

Three-dimensional CT imaging of an isolated dissecting aneurysm of the superior mesenteric artery  

Microsoft Academic Search

.   A case of an isolated dissecting aneurysm of the superior mesenteric artey is presented with findings of three-dimensional\\u000a CT imaging. False lumen, intimal flap, entry, and re-entry are clearly identified on threedimensional CT imaging.

H. Hyodoh; K. Hyodoh; K. Takahashi; M. Yamagata; K. Kanazawa

1996-01-01

448

Multislice CT Scans in Patients on Extracorporeal Membrane Oxygenation: Emphasis on Hemodynamic Changes and Imaging Pitfalls  

PubMed Central

This pictorial review provides the principles of extracorporeal membrane oxygenation (ECMO) support and associated CT imaging features with emphasis on the hemodynamic change