title: Undifferentiated carcinoma of the pancreas involving intraductal pedunculated polypoid growth.
abstract: We herein report a case of pancreatic undifferentiated carcinoma involving intraductal pedunculated polypoid growth. Duodenoscopy disclosed a congested polypoid mass protruding from the orifice of the papilla of Vater. Endoscopic retrograde pancreatography (ERP) showed a polypoid lesion in Wirsung's duct and Santorini's duct. Pancreatic juice cytology using the cell block method revealed the presence of undifferentiated carcinoma. No extraductal invasion was detected on endoscopic ultrasonography and or intraductal ultrasonography. The patient therefore underwent pancreaticoduodenectomy. A histological examination revealed an intraductal polypoid tumor with a thin stalk without extraductal invasion. The tumor was composed of an abundant mixture of pleomorphic cells, spindle cells, giant cells, and a small amount of adenocarcinoma.
authors.affiliation: Departemetnt of Gastroenterology, Sendai City Medical Center, Japan. syoubei@opnehp.or.jp
authors.forename: Shotaro
authors.initials: S
authors.lastname: Ishii
authors.forename: Go
authors.initials: G
authors.lastname: Kobayashi
authors.forename: Naotaka
authors.initials: N
authors.lastname: Fujita
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Noda
authors.forename: Kei
authors.initials: K
authors.lastname: Ito
authors.forename: Jun
authors.initials: J
authors.lastname: Horaguchi
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Koshita
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Kanno
authors.forename: Takahisa
authors.initials: T
authors.lastname: Ogawa
authors.forename: Kaori
authors.initials: K
authors.lastname: Masu
authors.forename: Shinichi
authors.initials: S
authors.lastname: Hashimoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Sawai
authors.forename: Miwa
authors.initials: M
authors.lastname: Uzuki
mesh_terms: D002277:Carcinoma / Q000473:pathology; D021441:Carcinoma, Pancreatic Ductal / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000473:pathology*; D011127:Polyps / Q000473:pathology