Depressed lesion detected during surveillance colonoscopy in a patient with ulcerative colitis. - Numa, Keijiro; Kakimoto, Kazuki; Mizuta, Noboru; Kinoshita, Naohiko; Nakazawa, Kei; Koshiba, Ryoji; Hirata, Yuki; Kawakami, Ken; Miyazaki, Takako; Nakamura, Shiro; Nishikawa, Hiroki (Intestinal Research, 2026)