title: Cystic lesion mimicking intraductal papillary mucinous tumor arising in heterotopic pancreas of the stomach and synchronous intraductal papillary mucinous adenocarcinoma of the pancreas.
abstract: This article presents the study of a 66-year-old man with an asymptomatic pancreatic mass detected incidentally 4 months earlier. A magnetic resonance imaging scan revealed 2 distinct cystic masses in the pancreas and the gastric antrum. Microscopically, the pancreatic lesion showed dilated cysts containing papillary structures lined by mucinous epithelium, which showed a loss of polarity, an increased nucleus-to-cytoplasm ratio, a prominent nucleolus, and high proliferation on immunostaining for Ki-67. The gastric lesion was composed of heterotopic pancreatic tissue surrounding a large dilated cyst that was lined with mucinous epithelium and contained a few intraluminal papillae.
authors.affiliation: Department of Pathology, Institute for Medical Science, Chonbuk National Univerity Medical School, Jeonju, Korea.
authors.forename: Ho Sung
authors.initials: HS
authors.lastname: Park
authors.forename: Kyu Yun
authors.initials: KY
authors.lastname: Jang
authors.forename: Young Kon
authors.initials: YK
authors.lastname: Kim
authors.forename: Hee Chul
authors.initials: HC
authors.lastname: Yu
authors.forename: Baik Hwan
authors.initials: BH
authors.lastname: Cho
authors.forename: Woo Sung
authors.initials: WS
authors.lastname: Moon
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D000368:Aged; D021441:Carcinoma, Pancreatic Ductal / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D049109:Cell Proliferation; D002828:Choristoma; D003937:Diagnosis, Differential; D018572:Disease-Free Survival; D005743:Gastrectomy; D006801:Humans; D019394:Ki-67 Antigen / Q000378:metabolism; D008279:Magnetic Resonance Imaging; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D010179:Pancreas; D010181:Pancreatic Cyst / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D016577:Pancreaticoduodenectomy; D013272:Stomach Diseases / Q000378:metabolism / Q000473:pathology* / Q000601:surgery
chemical_list: D019394:Ki-67 Antigen