title: Multiple urethral calculi--an unusual cause of acute retention of urine.
mesh_terms: D000208:Acute Disease; D000368:Aged; D006801:Humans; D008297:Male; D014524:Urethral Obstruction / Q000150:complications*; D014545:Urinary Calculi / Q000150:complications*; D014555:Urination Disorders / Q000209:etiology*