title: Volumetric analyses of venous variations in the left liver using 3D-CT venography.
abstract: OBJECTIVE
  Knowledge of intrahepatic vascular variations, especially in hepatic venous anatomy, is inevitable for carrying out liver surgery safely. However, vascular anatomy of the right liver or right side tributaries of the MHV has been focused in various studies and there have been only a few reports on the left liver.
  
  
  METHODS
  Sixty consecutive living donors for liver transplantation in a single institute were reviewed. Ramification patterns and drainage volume of each venous tributary were evaluated using 3D-CT venography.
  
  
  RESULTS
  Four characteristic venous tributaries; left superficial vein (LSV), umbilical fissure vein (UFV), and superior/inferior veins of Segment IV (V4sup/4inf) were detected on 3D-CT. Of these, LSV and UFV were sometimes rather thick overwhelming the LHV trunk and drained more than 20% of the left liver in 11 (18.3%) and 4 patients (6.7%), respectively. In such cases, proportions of Segment II (LSV drainage area) or Segment III+IV (UFV drainage area) were significantly large compared with those in typical venous ramification cases.
  
  
  CONCLUSIONS
  Clinically significant findings on venous variations in the left liver were described. Preoperative volumetric assessment of the draining areas of these veins is useful in surgical decision making on venous reconstruction and/or extent of liver resection.
authors.affiliation: Hepato-biliary-pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, University of Tokyo, Japan. shindou-tky@umin.ac.jp
authors.forename: Junichi
authors.initials: J
authors.lastname: Shindoh
authors.forename: Norihiro
authors.initials: N
authors.lastname: Kokudo
authors.forename: Shouichi
authors.initials: S
authors.lastname: Satou
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Sugawara
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Makuuchi
mesh_terms: D006503:Hepatic Veins / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D006801:Humans; D021621:Imaging, Three-Dimensional; D008099:Liver / Q000098:blood supply*; D016031:Liver Transplantation; D019520:Living Donors; D010690:Phlebography / Q000379:methods*; D014057:Tomography, X-Ray Computed