Title Search [OP 8-1] Quality of pancreatic surgery in terms of the burden of complication using the accordion severity grading system and postoperative morbidity index Kwangyeol PAIK (The Catholic University of Korea, Korea) [OP 8-2] Randomized controlled study comparing the analgesic effects of intravenous patient-controlled analgesia and patient-controlled epidural analgesia after open major surgery for pancreatobiliary cancer Jangho PARK (Osan Hankook Hospital, Korea) [OP 8-3] Does endoscopic sphincterotomy have an adverse oncologic effect in patients undergoing curative surgery for ampulla of vater cancer? Yoo Jin CHOI (Korea University, Korea) [OP 8-4] Prognostic role of liver resection in extended cholecystectomy for T2 gallbladder cancer revisited: A propensity score-matched analysis Yeshong PARK (Seoul National University, Korea) [OP 8-5] Can surgical resection of metastatic lesions be beneficial to pancreatic ductal adenocarcinoma patients with isolated lung metastasis? Won-Gun YUN (Seoul National University, Korea) [OP 8-6] Safety evaluation of early drain removal following pancreatic resections: meta-analysis and single-center retrospective cohort study Kai CHEN (Peking University First Hospital, China) [OP 8-7] Risk factors of malignant mucinous cystic neoplasm of pancreas and its prognosis Ji Won YOO (Sungkyunkwan University, Korea)