Nonami et al graded portal vein thrombosis in a resected liver with grading confined to the main trunk and the intrahepatic branches. The authors are from the University of Pittsburgh.
Extent of Thrombus
Grade
<= 50% occlusion
0
51-100% of diameter occlusion and/or sclerotic obliteration of the intrahepatic portal vein branches
1
51-100% of diameter occlusion and/or sclerotic obliteration of the left and/or right portal vein extending near the bifurcation
2
51-90% of diameter occlusion and/or sclerotic obliteration of the portal vein trunk
3
91-100% of diameter occlusion and/or sclerotic obliteration of the portal vein trunk
4
The grade correlates with the type of vascular anastomosis required for the liver transplant. Anastomosis is simple for Grades 1 and 2 but complex for Grade 4.
The classification does not include status of thrombosis in the rest of the portal venous system.
To read more or access our algorithms and calculators, please log in or register.
