Figure 3. Management of a case which required resection of the portal vein. Accessible pancreatic veins were divided and a bypass was established between the iliac vein and the paraumbilical vein using an antithrombogenic portal vein bypass catheter. The portal vein was then clamped with vascular clamps. Since the portal venous flow was maintained via a catheter bypass, even after the clamping of the portal vein, the resection and anastomosis of the portal vein was performed safely and unhurriedly.