title: Branching patterns of the main portal vein: effect on estimated remnant liver volume in preoperative evaluation of donors for liver transplantation.
abstract: OBJECTIVE
  To compare estimated remnant liver volume (ERLV) ratios among the major main portal vein (MPV) variants.
  
  
  METHODS
  Eighty-five potential donors underwent multidetector CT examination. Arterial, portal and hepatic venous phase images were obtained. CT volumetric measurements were performed by using summation-of-area method. MPV variants were classified into three groups. In type 1 (group 1), the MPV branches into the right portal vein (RPV) and the left portal vein (LPV). In type 2 (group 2), the MPV trifurcates into the right anterior portal vein (RAPV), right posterior portal vein (RPPV) and LPV. In type 3 (group 3), the RPPV arises from the MPV as a first branch, and the RAPV emerges directly from the LPV.
  
  
  RESULTS
  No differences were observed between groups 1 and 2 with respect to ERLV ratios. However, significant differences were discovered between groups 1 and 3 and between groups 2 and 3 (p<0.001 and p<0.05, respectively).
  
  
  CONCLUSIONS
  The ERLV proportions in the donors with a type 3 MPV variation were significantly lower than those in the donors with type 1 and type 2 MPV variations and six (31.6%) donors in group 3 presented an ERLV percentage below 30% of the total liver volume.
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Radiology, Kizilay sokak No: 4, 06100, Sihhiye, Ankara, Turkey. sarperokten@yahoo.com
authors.forename: Riza S
authors.initials: RS
authors.lastname: Okten
authors.forename: Fahrettin
authors.initials: F
authors.lastname: Kucukay
authors.forename: Hakan
authors.initials: H
authors.lastname: Dedeoglu
authors.forename: Meral
authors.initials: M
authors.lastname: Akdogan
authors.forename: Sabite
authors.initials: S
authors.lastname: Kacar
authors.forename: Birol
authors.initials: B
authors.lastname: Bostanci
authors.forename: Tulay
authors.initials: T
authors.lastname: Olcer
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016009:Chi-Square Distribution; D003287:Contrast Media; D005260:Female; D006801:Humans; D007472:Iohexol; D016031:Liver Transplantation; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000000981:diagnostic imaging*; D011857:Radiographic Image Interpretation, Computer-Assisted; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol