Measurement of SM invasion depth by ‘Committee of Management for sm Carcinoma Project’ of the Japanese Society for Cancer of the Colon and Rectum J Gastroenterol 2004;39:534-543 A. Pedunculated SICC B. Nonpedunculated SICC C. Nonpedunculated SICC, mm: not indentified Base line Level 2 by Haggitt Above the baseline: as a head invasion Muscularis mucosae Superficial aspect of submucosal invasive colorectal carcinoma SICC: submucosal invasive colorectal carcinoma

Digestive Endoscopy 2004;16:S161-S164

Gastroenterology . 1985;89:328-336 Level 0: adenoma with intramucosal carcinoma (in situ) Level 1: penetration of malignant glands through the muscularis mucosa into the submucosa, within the polyp head Level 2: the same submucosal invasion, but present at the junction of the head to the stalk Level 3: invasion of the stalk Level 4: invasion of the stalk’s base at the connection to the colonic wall