Kotzampassi, K Duodenal polyposis in Gardner's syndrome: the significance of endoscopic surveillance. [electronic resource] - The American journal of gastroenterology Nov 1990 - 1541-2 p. digital Publication Type: Case Reports; Letter ISSN: 0002-9270 Subjects--Topical Terms: Adenoma--complicationsAdenomatous Polyposis Coli--complicationsAdultDuodenal Neoplasms--complicationsDuodenoscopyGardner Syndrome--complicationsHumansIntestinal Polyps--complicationsMale