title: Combined resection of the portal vein for pancreatic cancer: preoperative diagnosis of invasion by portography and prognosis.
abstract: OBJECTIVE
  Pancreatic cancer often invades the portal vein because of the anatomical position. Pancreatic cancer with portal vein invasion was not considered operable, and thus the resectability rate was low.
  
  
  METHODS
  Between March 1976 and February 1994, 140 of 243 patients underwent resection, a resectability rate of 58%. A total of 81 (58%) of these patients underwent portal vein resection. We assessed 56 patients in whom the depth of invasion had already been determined histopathologically and whose superior mesenteric arterial portograms were readable. The 56 patients were classified into 4 groups: normal (Type I), stricture on one side of the portal vein (Type II), stricture on both sides of the portal vein (Type III), complete obstruction (Type IV). The length of the longitudinal lesions on portograms was also measured.
  
  
  RESULTS
  In 93% (27/29 cases) of portographic Type I or II lesions with longitudinal lesions of 2 cm or less, portal vein invasion was limited to the tunica media. No patients with cancer invasion into the lumen survived more than 1 year.
  
  
  CONCLUSIONS
  For patients with pancreatic cancer Type I or II, preoperative portography findings and longitudinal lesions of 2 cm or less, portal vein resection is indicated, and long-term survival can be expected.
authors.affiliation: Department of Surgery, Tochigi Cancer Center, Japan. takahasi@mc.med.keio.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Takahashi
authors.forename: Y
authors.initials: Y
authors.lastname: Ogata
authors.forename: K
authors.initials: K
authors.lastname: Aiura
authors.forename: M
authors.initials: M
authors.lastname: Kitajima
authors.forename: K
authors.initials: K
authors.lastname: Hiramatsu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D011169:Portal Vein / Q000473:pathology / Q000601:surgery*; D011172:Portography; D011379:Prognosis; D015996:Survival Rate