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Radiology, Vol 198, 249-257, Copyright © 1996 by Radiological Society of North America
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C Procacci, R Graziani, E Bicego, IA Bergamo-Andreis, P Mainardi, G Zamboni, P Pederzoli, G Cavallini, M Valdo and GF Pistolesi
Department of Radiology, University Hospital, Verona, Italy.
PURPOSE: To evaluate the radiologic characteristics of intraductal mucin-producing tumors of the pancreas. MATERIALS AND METHODS: Sixteen patients with intraductal tumors underwent ultrasound (US); (n = 15), computed tomography (CT); (n = 16), endoscopic retrograde cholangiopancreatography (ERCP); (n = 12), and intraoperative pancreatography (n = 2). Findings were compared with those from surgery (n = 14) or biopsy (n = 2). RESULTS: Lesions were classified as either main duct type or branch duct type tumors. Main duct tumors were characterized at US and CT by either diffuse or segmental dilatation of the Wirsung duct. Pancreatography showed ductal dilatation and filling defects caused by mucin deposits. At US and CT, branch duct tumors, which were mainly located at the uncinate process, were seen as fluid- filled masses with central septa and the pancreatic duct was dilated. ERCP showed partial or complete opacification of the lesion. In four patients, endoscopy showed protrusion of the papilla into the duodenal lumen and mucin leaking from its dilated orifice. CONCLUSION: Imaging modalities, especially US and ERCP, enable early diagnosis of mucin- producing pancreatic tumors.
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