title: Preoperative assessment of hilar cholangiocarcinoma: combination of cholangiography and CT angiography.
abstract: BACKGROUND
  Hilar cholangiocarcinoma is one of the most difficult carcinomas to manage because of the location of the main tumor at the hepatic hilus and the complex anatomy of the biliary, arterial, and portal systems. To plan an operation, it is important to acquire accurate information about the relationship between hilar cholangiocarcinoma and adjacent vessels. This study aimed to evaluate the clinical value of cholangiography combined with spiral CT three-dimensional (3D) angiography for a preoperative assessment of hilar cholangiocarcinoma.
  
  
  METHODS
  From March 2007 to August 2009, cholangiography was performed in 13 patients with hilar cholangiocarcinoma. Meanwhile, contrast-enhanced abdominal scanning was performed using 16-slice spiral CT, and the 3D images of the hepatic artery and portal vein were acquired. The level and range of invasion of the hepatic artery, the portal vein, and the bile duct, the preoperative Bismuth classification, and T-staging were recorded and compared with those after surgical exploration.
  
  
  RESULTS
  The hepatic artery and portal vein were reconstructed successfully in all these patients. Percutaneous transhepatic cholangiography was performed in 9 patients, endoscopic retrograde cholangiopancreatography in 1, and magnetic resonance cholangiopancreatography in 3. The CT angiography records of invasion of the hepatic artery were consistent with the results of explorations in these patients. The data from 5 of the 13 patients were consistent with those on invasion of the portal vein. The results of the Bismuth classification and the T-staging system were consistent with those of surgical exploration in 12 of the 13 patients. Seven of 8 patients who were estimated to be suitable for operation based on images were curatively treated and 5 who were judged to be unsuitable for curative operation by cholangiography and CT angiography were confirmed intraoperatively and underwent palliative procedures.
  
  
  CONCLUSIONS
  Cholangiography combined with multi-slice spiral 3D CT angiography can satisfactorily delineate the local invasion of hilar cholangiocarcinoma and accurately evaluate the resectability. This approach, therefore, contributes to the planning of safe operation.
authors.affiliation: Department of General Surgery, Jinhua Central Hospital, Jinhua 321000, China.
authors.forename: Shi-An
authors.initials: SA
authors.lastname: Yu
authors.forename: Cheng
authors.initials: C
authors.lastname: Zhang
authors.forename: Jia-Min
authors.initials: JM
authors.lastname: Zhang
authors.forename: Gen-Jun
authors.initials: GJ
authors.lastname: Mao
authors.forename: Long-Tang
authors.initials: LT
authors.lastname: Xu
authors.forename: Xiao-Kang
authors.initials: XK
authors.lastname: Wu
authors.forename: Jin-Er
authors.initials: JE
authors.lastname: Shu
authors.forename: Guang-Hong
authors.initials: GH
authors.lastname: Lv
authors.forename: Zhang-Dong
authors.initials: ZD
authors.lastname: Zheng
mesh_terms: D000368:Aged; D000792:Angiography; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D001653:Bile Ducts, Intrahepatic; D018281:Cholangiocarcinoma / Q000000981:diagnostic imaging* / Q000601:surgery; D002758:Cholangiography / Q000379:methods*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008875:Middle Aged; D036542:Tomography, Spiral Computed / Q000379:methods*