3Kudo Sinea. Early Colorectal Cancer-detection of Depressed Types of Colorectal Carcinoma [M]. Tokyo: Igaku-Shoin Medical Publisher, 1996:50-51.
4Kiesslich R, Neurath M F. Endoscopic Mucosal Resection: An Evolving Therapeutic Strategy for Non-polypoid Colorectal Neoplasia[ J ].Gut,2004,53(9): 1222-1224.
5Tamura S, Nakajo K, Yokoyama Y, et al. Evaluation of Endoscopic Mucosal Resection for Laterally Spreading Rectal Tumors[ J ].Endoscopy,2004,36(4):306-312.
