Argon Plasma Coagulation With Cholangioscopy as Additional Treatment for Residual Ampullary Tumor in a Young Familial Adenomatous Polyposis Patient. Issue 8 (27th August 2019) - Cho, Hourin; Yamada, Masayoshi; Tanabe, Noriko; Yoshida, Teruhiko; Sugano, Kokichi; Hashimoto, Taiki; Hijioka, Susumu