We report two different types of portal vein obstruction after liver resect
ion: portal vein thrombosis due to steal phenomenon via a splenorenal shunt
, and kinking of the skeletonized left portal vein after right hepatic lobe
ctomy with caudate lobectomy. The two cases of portal vein obstruction were
asymptomatic without any suggestive laboratory findings. Only routine Dopp
ler ultrasonography detected portal vein obstruction which was successfully
treated by emergency operation.