title: Renal extravasation of urine due to bladder outflow obstruction.
abstract: Spontaneous extravasation of urine from the kidney is uncommon. The majority of cases in adults are associated with ureteral calculi, while in children the condition is associated with urethral valves of ureteropelvic junction obstruction.
mesh_terms: D000368:Aged; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging; D007674:Kidney Diseases / Q000175:diagnosis / Q000209:etiology*; D008297:Male; D011470:Prostatic Hyperplasia / Q000150:complications*; D014463:Ultrasonography; D001748:Urinary Bladder Neck Obstruction / Q000150:complications*; D014556:Urine; D014567:Urography