title: Intraductal papillary mucinous neoplasm originating from a jejunal heterotopic pancreas: report of a case.
abstract: We report a rare case of an intraductal papillary mucinous neoplasm (IPMN) originating from a jejunal heterotopic pancreas, found incidentally during surgery. A 75-year-old woman was referred to our department for surgical treatment of an abdominal aortic aneurysm (AAA) and a concurrent oropharyngeal tumor. During surgery to correct the AAA, we found a jejunal tumor incidentally and performed partial resection of the jejunum. Microscopically, the jejunal tumor showed dilated ducts containing intraluminal papillae lined with mucinous epithelium with low-grade cytological and architectural atypia within the pancreatic tissue. Immunohistochemical staining revealed MUC1 (-), MUC2 (-), MUC5AC (+), and MUC6 (-) proteins. To the best of our knowledge, only six cases of IPMN originating from a heterotopic pancreas have been reported in English, and this is the first report of an IPMN originating from a jejunal heterotopic pancreas.
authors: Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University, 1-1, Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan, hi_ok_0531@yahoo.co.jp.
authors: Hiroshi
authors: H
authors: Okamoto
authors: Fumiyoshi
authors: F
authors: Fujishima
authors: Kazuyuki
authors: K
authors: Ishida
authors: Ken
authors: K
authors: Tsuchida
authors: Takuya
authors: T
authors: Shimizu
authors: Hitoshi
authors: H
authors: Goto
authors: Akira
authors: A
authors: Sato
authors: Susumu
authors: S
authors: Satomi
authors: Hironobu
authors: H
authors: Sasano
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000150:complications / Q000601:surgery*; D000368:Aged; D017544:Aortic Aneurysm, Abdominal / Q000150:complications / Q000601:surgery; D021441:Carcinoma, Pancreatic Ductal / Q000150:complications / Q000601:surgery*; D002828:Choristoma; D005260:Female; D006801:Humans; D033162:Incidental Findings; D007579:Jejunal Diseases; D009378:Neoplasms, Multiple Primary; D009959:Oropharyngeal Neoplasms / Q000150:complications / Q000601:surgery; D010179:Pancreas; D010190:Pancreatic Neoplasms / Q000150:complications / Q000601:surgery*