title: Portal venous invasion by pancreatobiliary carcinoma: diagnosis with intraportal endovascular US.
abstract: OBJECTIVE
  To evaluate use of intraportal endovascular ultrasonography (IPEUS) in diagnosing portal venous invasion by pancreatobiliary carcinoma.
  
  
  METHODS
  IPEUS was performed in 26 consecutive patients with pancreatobiliary carcinoma. All patients underwent surgery. IPEUS was performed intraoperatively in 20 cases and preoperatively in six. The sonographic criterion for detection of portal venous invasion was obliteration of the echogenic band of the portal vein. The IPEUS results were compared with those of computed tomography (CT) and arterial portography.
  
  
  RESULTS
  Vascular invasion was confirmed with use of resected specimens in seven patients and operative findings in five patients. For diagnosis of portal venous invasion, the sensitivity, specificity, and overall accuracy of IPEUS were all 100%; respective values were 92%, 64%, and 77% for angiography and 50%, 79%, and 65% for CT.
  
  
  CONCLUSIONS
  IPEUS allows detection or exclusion of early invasion of the portal venous wall by pancreatobiliary carcinoma.
authors.affiliation: Department of Surgery II, Faculty of Medicine, Nagoya University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kaneko
authors.forename: A
authors.initials: A
authors.lastname: Nakao
authors.forename: S
authors.initials: S
authors.lastname: Inoue
authors.forename: T
authors.initials: T
authors.lastname: Endo
authors.forename: S
authors.initials: S
authors.lastname: Itoh
authors.forename: A
authors.initials: A
authors.lastname: Harada
authors.forename: T
authors.initials: T
authors.lastname: Nonami
authors.forename: H
authors.initials: H
authors.lastname: Takagi
mesh_terms: D000368:Aged; D001661:Biliary Tract Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D011169:Portal Vein / Q000000981:diagnostic imaging* / Q000473:pathology; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography