A polypoid adenoma that arises from and protrudes into the lumen of the colon. Epithelial dysplasia is always present. According to the architectural pattern it is classified as tubular, tubulovillous, or villous. The disease is MONDO_0006498 (adenomatous colon polyp). Also known as: adenomatous polyp of colon, adenomatous polyp of the colon, colon adenomatous polyp, colonic adenomatous polyp.