title: Spontaneous urinary extravasation in non-acute ureteric obstruction: a report of four cases.
abstract: Four new cases of spontaneous extravasation of contrast medium during intravenous urography have been described. All were due to non-acute obstruction of the ureter. This is relatively uncommon as most of the cases previously described have been due to passage of a ureteric calculus. Two of the patients improved after relief of the obstruction. In one a nephrectomy was carried out, and one patient died of an unrelated cause before the obstruction could be relieved.
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging; D008297:Male; D011859:Radiography; D014517:Ureteral Obstruction / Q000150:complications / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media