Endoscopic papillectomy for the complete resection of a pedunculated intra-ampullary papillary-tubular neoplasm confined within a choledochocele, Miyake, Jun Ushio, Toshiyasu Iwao, Keiso Sasaki, Yamato Tada, Hisaki Kato, Yuki Kawasaki, Kazuya Sumi, Koji Yoshida, Clinical Journal Gastroenterology, Feb. 2026, Peer-reviewed