Title Search [BP OP 2-1] Multi-center comparative study between totally laparoscopic and robotic pancreaticoduodenectomy: Propensity score and learning curve matching analysis Jae Hoon LEE (University of Ulsan, Korea) [BP OP 2-2] Impact of misclassification of Klatskin tumor on incidence of intra- and extrahepatic bile duct cancer: A population-based national cancer registry study MEE JOO KANG (National Cancer Center, Korea) [BP OP 2-3] Precision strategy based on cancer-specific molecular subtypes of bile duct cancer from comprehensive analysis using multi-omics dataset Hye Jung CHO (CHA University, Korea) [BP OP 2-4] Clinical implication of tumor location in intrahepatic cholangiocarcinoma and assessment of the current staging system Hee Ju SOHN (Seoul National University, Korea) [BP OP 2-5] Prognostic impact of perioperative CA19-9 levels in patients with resected perihilar cholangiocarcinoma Jong Woo LEE (Hallym University, Korea) [BP OP 2-6] The triple-checked criteria for drain management after pancreatectomy Daisuke HASHIMOTO (Kansai Medical University, Japan) [BP OP 2-7] Optimal timing of portal vein embolization (PVE) after preoperative biliary drainage for hilar cholangiocarcinoma Yunghun YOU (Eulji University, Korea)