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Intraoperatory grading of PVT extension[17]
| Yerdel’s grading |
| < 50% occlusion of the portal vein |
| > 50% occlusion of the portal vein (including total occlusion) |
| Complete thrombosis of both portal and proximal superior mesenteric vein |
| Complete thrombosis of portal vein and proximal and distal superior mesenteric vein |
