title: Benign bladder neck polyp causing tandem obstruction of the urinary tract in a patient with Beckwith-Wiedemann syndrome.
mesh_terms: D001506:Beckwith-Wiedemann Syndrome / Q000150:complications*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011127:Polyps / Q000150:complications*; D001748:Urinary Bladder Neck Obstruction / Q000175:diagnosis / Q000209:etiology*; D001749:Urinary Bladder Neoplasms / Q000150:complications*