Histopathological analysis of benign polyps in patients with carcinoma of the colon and rectum.

All benign polyps in a 10-year series of 960 patients with colorectal carcinoma from a defined population were analysed. All cases where histological specimens of the polyps were available were reclassified according to morphological type and grade of differentiation. The findings lend support to the assumption of a relationship between benign epithelial neoplasms and adenocarcinoma of the colon and rectum.