Abstract
Portal vein thrombosis is one of the fetal complications after surgery for hilar chlangiocarcinoma. Some factors are considered to cause post operative portal vein thrombosis. We evaluated the relation between branch angle of portal vein and post operative portal vein thrombosis in this literature. We encountered two cases of portal vein thrombosis after right hemi-hepatectomy. Case1 is 78 year old man. The hilar cholangioma was Bismuth type II. The left branch angle of portal vein was 18 degree. Case2 is 74 year old man. The hilar cholangioma was Bismuth type IV. The left branch angle of portal vein was 95 degree. We examined the left branch angle of portal vein in 9 cases of right hemi-hepatectomy for hilar cholangioma from Octorber 2005 to June 2014. The branch angle of portal vein was obviously acute in cases of portal vein thrombosis. We considered that acute left branch angle of portal vein would be one of the risk factors of postoperative portal vein thrombosis.
