The incidence of portal vein thrombosis at liver transplantation
Toshiaki Nonami, Itsuo Yokoyama, Shunzaburo Iwatsuki, Thomas E. Starzl – 1 November 1992 – The incidence of portal vein thrombosis was examined in 885 patients who received orthotopic liver transplantations for various end‐stage liver diseases between 1989 and 1990. The thrombosis was classified into four grades. Grade 1 was thrombosis of intrahepatic portal vein branches, grade 2 was thrombosis of the right or left portal branch or at the bifurcation, grade 3 was partial obstruction of the portal vein trunk, and grade 4 was complete obstruction of the portal vein trunk.