Pancreatic ductal adenocarcinoma is spread to the peripancreatic soft tissue in the majority of resected cases, rendering the AJCC T-stage protocol (7th Edition) inapplicable and Insignificant: A size-based staging system (pT1: ?2, pT2: >2–?4, pT3: >4 cm) is more valid and clinically relevant için istatistikler