Figure 2: Survival after Pancreatoduodenectomy for Locally Advanced Tumors with Portal Venous Resection. Kaplan-Meier Survival Function Plot. Asterisk denotes    for Logrank test versus the control group BYP M0. BYP: palliative bypass procedure, M0: absence of distant metastasis at laparotomy, and PVR: portal venous resection.