A in situ carcinoma that involves the colon. The disease is colon carcinoma in situ (MONDO_0004663). Also known as: carcinoma in situ of colon, carcinoma in situ of the colon, colon cancer stage 0, colon in situ carcinoma, colonic carcinoma in situ, stage 0 carcinoma of colon, stage 0 carcinoma of the colon, stage 0 colon cancer.