Fig. 1From: Individualized preoperative planning using three-dimensional modeling for Bismuth and Corlette type III hilar cholangiocarcinomaClassification system for type III hilar cholangiocarcinoma based on the 3D modeling of the portal vein. a Type I. b Type II. c Type III. d Type IV. RA right anterior portal vein, RP right posterior portal vein, LT left portal veinBack to article page