A non-neoplastic hamartomatous polyp that arises from the colon. It is characterized by the presence of tortuous and cystically dilated glands, edematous changes, and inflammation. The disease is colon juvenile polyp (MONDO_0006153). Also known as: colon retention polyp, colonic juvenile polyp, colonic retention polyp, juvenile polyp of colon, juvenile polyp of the colon, retention polyp of colon, retention polyp of the colon.