title: Extracolonic manifestations of the familial adenomatous polyposis syndromes.
abstract: The classic prototypes of the gastrointestinal polyposis syndromes are familial polyposis coli and Gardner syndrome. Extracolonic manifestations have been described in both diseases, and the distinction between them has become less clear. In fact, some authorities have suggested that familial polyposis coli and Gardner syndrome may represent a spectrum of the same disease. In both conditions, extracolonic expressions are the rule rather than the exception, and familiarity with them is essential for accurate diagnosis and correct patient management. In this pictorial essay, we discuss familial polyposis coli and Gardner syndrome together under the heading familial adenomatous polyposis syndromes. The colonic characteristics of these syndromes will be reviewed briefly, followed by examples of the most common extracolonic manifestations.
authors.affiliation: Department of Radiology, University of Nebraska Medical Center, Omaha 68198-1045.
authors.forename: R K
authors.initials: RK
authors.lastname: Harned
authors.forename: J L
authors.initials: JL
authors.lastname: Buck
authors.forename: W W
authors.initials: WW
authors.lastname: Olmsted
authors.forename: R P
authors.initials: RP
authors.lastname: Moser
authors.forename: P R
authors.initials: PR
authors.lastname: Ros
mesh_terms: D011125:Adenomatous Polyposis Coli / Q000000981:diagnostic imaging* / Q000235:genetics; D001661:Biliary Tract Neoplasms / Q000000981:diagnostic imaging; D001859:Bone Neoplasms / Q000000981:diagnostic imaging; D002493:Central Nervous System Diseases / Q000000981:diagnostic imaging; D004814:Epidermal Cyst / Q000000981:diagnostic imaging; D005736:Gardner Syndrome / Q000000981:diagnostic imaging* / Q000235:genetics; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging