Appendiceal cancer showing a submucosal tumor-like morphology in the ascending colon on colonoscopy: a case report. - Koshino, Kurodo; Nakagawa, Ryosuke; Tani, Kimitaka; Ogawa, Shimpei; Yamamoto, Tomoko; Inoue, Yuji; Yamaguchi, Shigeki (Journal of Surgical Case Reports, 2023)