title: Ureteral polyps presenting as ureteropelvic junction obstruction in children.
mesh_terms: D002648:Child; D006801:Humans; D007682:Kidney Pelvis; D008297:Male; D011127:Polyps / Q000150:complications* / Q000473:pathology; D011859:Radiography; D014516:Ureteral Neoplasms / Q000150:complications* / Q000473:pathology; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology*