Early Detection and Curative Endoscopic Submucosal Dissection of a 4-mm Signet Ring Cell Microcarcinoma in a Reconstructed Gastric Tube: A Case Report. - Sato M; Takahashi S; Shimura M; Kobayashi N; Arata S; Domen T; Yamauchi M; Iijima K (Cureus, 2025)