The ampulla of Vater represents the epithelial junction of the main pancreatic duct and the distal bile duct, surrounded by the pancreatic head and duodenum parenchyma. Ampullary carcinoma can arise either from the intestinal epithelium or the epithelium covering the pancreatobiliary ducts. Many tumors develop from pre-existing adenomas, others evolve from precursor intraepithelial neoplasia su...

Benign pathologies demonstrated after a Whipple's resection (pancreatoduodenectomy) for pancreatic and peri-ampullary lesions are relatively uncommon. Here we report two cases where a Whipple's procedure was undertaken for suspected pancreaticobiliary cancer and where the final histology revealed, in each case, a rare benign lesion. The first case confirmed a cholesterol polyp in the distal com...

The risk of periampullary cancer in patients with classic familial adenomatous polyposis (FAP) is significantly increased compared with the general population. However, the incidence of this extracolonic manifestation in attenuated FAP (AFAP) is unknown. We report the case of a 38 year old woman with no known family history of polyposis or colorectal cancer, who presented with ampullary adenoca...

Herein, we present a case of coexisting neuroendocrine carcinoma and conventional adenocarcinoma (collision tumor) in the ampulla of Vater, which has seldom been reported in the literature. A 51-year-old man presented with a month history of jaundice. MRCP disclosed about 1.9×1.8 cm sized heterogeneously enhancing mass in ampulla of Vater, causing obstructions of distal common bile duct. He und...

HYPOTHESIS Survival following resection for ampullary carcinoma may be influenced by 1 or more clinical or pathologic variables. DESIGN Retrospective medical records review. SETTING Academic tertiary care center. PATIENTS From July 1, 1991, through April 30, 2004, 72 patients (31 males and 41 females) were treated for ampullary carcinoma at Loyola University Medical Center, Maywood, Ill. ...

Weakly electric fish use electroreception for both active and passive electrolocation and for electrocommunication. While both active and passive electrolocation systems are prominent in weakly electric Mormyriform fishes, knowledge of their passive electrolocation ability is still scarce. To better estimate the contribution of passive electric sensing to the orientation toward electric stimuli...