Title Search [P065] Parenchymal preserving hepatectomy in perihilar cholangiocarcinoma Incheon KANG (Yonsei University of College of Medicine, Korea) [P066] Early experience of robotic extended cholecystectomy in gallbladder cancer Yoonhyeong BYUN (Seoul National University Hospital, Korea) [P067] Outcome of extended surgery for advanced gallbladder cancer Hironori TANAKA (Hokkaido University Faculty of Medicine, Japan) [P068] The Impact of Portal Vein resection on Outcome of Hilar Cholangiocarcinoma Ki Bum KIM (Samsung Medical center, Korea) [P069] Can cystic lymph node be considered a sentinel lymph node for gallbladder cancer? Jae Yool JANG (Changwon Gyeongsang National University Hospital, Korea) [P070] Serum Lipid Levels and the Risk of Gallbladder Stones: A Population-based Study in China Jiwen WANG (Zhongshan Hospital, Fudan University, China) [P071] Validation of association cystic duct fibrosis and surgical difficulty in laparoscopic cholecystectomy Dong Hoon SHIN (Kosin University College of Medicine, Korea)