title: Colorectal polyposis with mixed juvenile and adenomatous patterns.
abstract: An unusual form of colorectal polyposis is described displaying juvenile, adenomatous and mixed patterns in a 17-year-old girl. Although juvenile polyposis is generally considered to be non-neoplastic in nature, in both the present and in other case reports histological findings support a neoplastic nature. Since an increase in the incidence of large bowel carcinomas has been found in subjects with a previous diagnosis of juvenile polyposis, these patients should be considered to be at risk, and submitted to follow up.
mesh_terms: D000236:Adenoma / Q000473:pathology; D000293:Adolescent; D003110:Colonic Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000473:pathology*; D012004:Rectal Neoplasms / Q000473:pathology*