title: Intraductal papillary mucinous tumors of the pancreas.
abstract: BACKGROUND
  An increasing number of intraductal papillary mucinous tumors of the pancreas have been reported in recent years. The indolent character and favorable prognosis of this neoplasm have been described.
  
  
  METHODS
  Intraductal papillary mucinous tumors were classified into main duct type (n = 8) and branch type (n = 28) according to the dominant location of the tumor. This single-institute study examined the clinicopathological features and outcome after surgical resection in patients with intraductal papillary mucinous tumors.
  
  
  RESULTS
  The gender, age, tumor size, and prognosis were quite similar for the main duct type and branch type groups. Branch type tumors were more frequently located in the head of the pancreas than were main duct type tumors. Histological examination revealed that 88% of main duct type tumors were adenocarcinomas; however, only 46% of branch type tumors were adenocarcinomas. Five-year survival rates for the patients with all main duct type tumors (n = 8), main duct type adenocarcinoma (n = 7), all branch type tumors (n = 28), and branch duct adenocarcinoma (n = 13) were 100%, 100%, 90.6%, and 90.9%, respectively.
  
  
  CONCLUSIONS
  Intraductal papillary mucinous tumors had a favorable prognosis after surgical treatment. A curative pancreatectomy should be indicated for this localized malignant tumor.
authors.affiliation: Second Department of Surgery, Chiba University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakagohri
authors.forename: T
authors.initials: T
authors.lastname: Kenmochi
authors.forename: O
authors.initials: O
authors.lastname: Kainuma
authors.forename: Y
authors.initials: Y
authors.lastname: Tokoro
authors.forename: T
authors.initials: T
authors.lastname: Asano
mesh_terms: D000328:Adult; D000368:Aged; D018291:Cystadenoma, Mucinous / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010183:Pancreatic Ducts; D010190:Pancreatic Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D016019:Survival Analysis