Title Search [BP DB 1] How to interpret the high-grade dysplasia in bile duct margin of biliary tract cancer Kee-Taek JANG (Sungkyunkwan University, Korea) [BP DB 2] Securing R0 margin through extended surgical approach Tomoki EBATA (Nagoya University Hospital, Japan) [BP DB 3] 'Wait and see' strategy avoiding extensive surgery Sung-Sik HAN (National Cancer Center, Korea)