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Borderline resectable tumors have been defined according to the most recent national comprehensive cancer network guidelines (version 2.2012)
| Tumor-associated deformity of the SMV or PV |
| Abutment of the SMV or PV > 180° |
| Short-segment occlusion of the SMV or PV amenable to resection and venous reconstruction |
| Short-segment involvement of the hepatic artery or its branches amenable to resection and reconstruction |
| Abutment of the SMA < 180° |
SMV: Superior mesenteric artery; PV: Portal vein.
