title: Main-duct intraductal papillary mucinous adenoma of the pancreas.
abstract: BACKGROUND
  The prevalence of carcinoma in main-duct intraductal papillary mucinous neoplasm (IPMN) is high, and surgical resection is recommended for all patients with a main-duct IPMN.
  
  
  RESULTS
  A main-duct IPMN with typical imagings including protruding lesions in the dilated main pancreatic duct was resected, but the histology was intraductal papillary mucinous adenoma of the pancreas.
  
  
  CONCLUSIONS
  It has been reported that the presence of mural nodules and dilatation of MPD are significantly higher in malignant IPMNs. The presented case had protruding lesions in the dilated main pancreatic duct on endoscopic ultrasonography, but the histology was adenoma.
  
  
  CONCLUSIONS
  Preoperative distinction between benign and malignant IPMNs is difficult.
authors: Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan.
authors: Kensuke
authors: K
authors: Takuma
authors: Terumi
authors: T
authors: Kamisawa
authors: Taku
authors: T
authors: Tabata
authors: Masanao
authors: M
authors: Kurata
authors: Goro
authors: G
authors: Honda
authors: Shin-Ichiro
authors: S
authors: Horiguchi
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000473:pathology* / Q000601:surgery; D000236:Adenoma / Q000473:pathology* / Q000601:surgery; D021441:Carcinoma, Pancreatic Ductal / Q000473:pathology* / Q000601:surgery; D002291:Carcinoma, Papillary / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D010183:Pancreatic Ducts / Q000473:pathology* / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome