No abstract available.
Diagnosis*

Pseudoaneurysm is uncommon but a life threatening complication of chronic pancreatitis. Angiography has been the standard definitive imaging modality in the diagnosis of pseudoaneurysm. However, over the past 5 years duplux US and Dynamic CT have been proven to be valuable. The authors report a case of gastroduodenal pseudoaneurysm in chronic pancreatitis, which could be diagnosed by duplux US and Dynamic CT. Furthermore this case proved to be a pseudocyst which converted into a pseudoaneurysm by vessel rupture.
Aneurysm, False* ; Angiography ; Arteries* ; Diagnosis* ; Pancreatitis, Chronic* ; Rupture

The authors defined precaval retropancreatic space as the space between pancreatic head with portal vein and IVC analyzed the CT findings of this space to know the normal structures and size in this space, We evaluated 100 cases of normal anbdominal CT scan to find out normal anatomic structures of precaval retropancreatic space retrospectively. We also measured the distance between these structures and calculated the minimum, maximum and mean values. At the splenoportal confluence level, normal structures between portal vein and IVC were vessel (21%), lymph node (19%), and caudate lobe of liver (2%) in order of frequency. The maximum AP diameter of portocaval lymph node was 4mm. Common bile duct(CBD) was seen in 44% and the diameter was mean 3mm and maximum 11mm. CBD was located in extrapancreatic (75%) and lateral (60.6%0 to pancreatic head. At IVC-left renal vein level, the maximum distance between CBD and IVC was 5mm and the structure between posterior pancreatic surface and IVC was only fat tissue. Knowledge of these normal structures and measurement will be helpful in differentiating pancreatic mass with retropancreatic mass such as lymphadenopathy.
Bile ; Head ; Liver ; Lymph Nodes ; Lymphatic Diseases ; Portal Vein ; Renal Veins ; Retrospective Studies ; Tomography, X-Ray Computed

No abstract available.
Frontal Bone* ; Humans

No abstract available.
Carcinoma, Hepatocellular*

No abstract available.

No abstract available.
Tachycardia, Supraventricular* ; Tachycardia, Ventricular*

PURPOSE: Retroperitoneal paraganglioma is a relatively uncommon neurogenic tumor, arising from paraganglial tissue. In our knowledge, there is few report about the radiologic findings of extraadrenal paraganglioma, therefore, here we document the adiologic findings of retroperitoneal paraganglioma with pathologic correlation. MATERIALS AND METHODS: In 5 patients with surgicopathologically confirmed extraadrenal paraganglioma and 1 clinjcolaboratorily confirmed case, we analyzed the ultrasonographic, computed tomographic and MRI findings, and correlated them with gross pathologic specimen. RESULTS: The location of the tumors was medial aspect of left kindey(n=2), superomedial aspect of right kidney hilum(n=2), and organ of Zuckerkandl area(n=2), UItrasonoram showed well-marginated mass(n=5), occasionally with irregular central necrosis with or without partially echogenic area suggesting hemorrhage(n=2). CT scan also showed well-marginated mass(n=6) with hemorrhagic necrosis(n--3) and contrast enhancement. One showed are shaped calcification along the capsule, and another case showed adhesion with aorta. In MRI, solid portion of the mass showed relatively low signal intensity on T1WI, increased signal on T2WI, and enhancement with gadolinium. Necrotic portion showed increased signal intensity on T1WI, and also showed increased signal intensity on T2WI, without contrast enhancement. Grossly the mass showed internal hemorrhagic necrosis of variable degree(n=6). CONCLUSION: If well-marginated mass is noted around the area of paraganglial distribution including organ of Zuckerkandl, especially with evidence of hemorrhagic necrosis and contrast enhancement, we must consider the possibility of paraganglioma despite no characteristic symptoms.
Aorta ; Gadolinium ; Humans ; Kidney ; Magnetic Resonance Imaging ; Necrosis ; Para-Aortic Bodies ; Paraganglioma* ; Tomography, X-Ray Computed

Intra- and extrahepatic bile duct can be invaded by hepatocellular carcinoma (HCC). This is infrequent in HCC, but it can directly affect the clinical manifestation and prognosis. We present eight cases of HCCs with emphasis on the incidence and features of bile duct invassion on computed tomography (CT). Over a period of 22 months, abdominal CT was performed in 186 with HCC patients. Out of these, five cases of bile duct invasion by HCC were confirmed in our hospital and three in other hospitals. The eight cases were evaluated for the type, size and location. CT features of intraductal mass and ductal dilatation were evaluated. The incidence of bile duct invasion in HCC was 2.6%. Infiltrative type of HCC was seen in seven cases and six of these had mass 5-11 cm in size. The characteristic CT findings of bile duct invasion in HCC are mass in common hepatic duct with bulging contour(8/80, multiple intraductal masses in the intrahepatic ducts (5/8), and diffuse dilatation of intrahepatic ducts (7/8).
Bile Ducts* ; Bile Ducts, Extrahepatic ; Bile* ; Carcinoma, Hepatocellular* ; Dilatation ; Hepatic Duct, Common ; Humans ; Incidence ; Prognosis ; Tomography, X-Ray Computed

The pseudolymphoma of the stomach is known to be a benign porliferation of lymphoid tissue, which can bemistaken hostoloigcally for malignant lymphoma. The etiology of pseudolymphoma is controversial, but it B believedto be a manifestation of chronic inflammatory process. Authors present 3 cases of gastric lymphoma. Impresssionsof upper gastrointestual series were as follows; lymphoma or chronic gastritis in one case, ulcerative carcinomain another case and early gastric carcinoma in the other case. Initial endoscopic findings suggested infiltratingcarcinoma, ulcerative carcinoma and two benign gastric ulcers, respectively. One case was associated wtih earlygastric carcinoma.
Gastritis ; Lymphoid Tissue ; Lymphoma ; Pseudolymphoma ; Stomach ; Stomach Ulcer ; Ulcer