Carcinomain situ in nonpolypoid mucosa of the large intestine report of a case with significance in strategies for early detection

Abstract
A case of carcinoma in situ of the flat, nonpolypoid mucosa of the large intestine in a 32-year-old man is reported. This case is of unusual importance because (1) it was detected by endoscopy and was effectively managed; (2) it sheds further light into the histogenesis of large intestinal carcinomas; and (3) it points to alternate strategies for early detection and prevention of large intestinal carcinomas.