Title Search [BP BEST OP 1] Inflammatory marker as a prognostic value in intraductal papillary mucinous neoplasm Hongbeom KIM (Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Korea) [BP BEST OP 2] Impact of the bile duct resection margin distance on survival of patients with resected extrahepatic bile duct cancer Kil Hwan KIM (Seoul National University Bundang Hospital, Korea) [BP BEST OP 3] Nomogram for predicting postoperative pancreatic fistula (POPF) Yunghun YOU (Konkuk University Choongju Hospital, Konkuk University School of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) [BP BEST OP 4] The potential of KRAS mutation in circulating-tumor DNA as a marker for prognosis in patients with pancreatic cancer Sang-Jae PARK (National Cancer Center, Korea) [BP BEST OP 5] ERBB signaling pathway targeted therapy is available in gallbladder cancer patients Yingbin LIU (Xinhua Hospital,Shanghai Jiaotong University School of Medicine, China)