Urinothorax, a rare complication of rupture renal calyx.

Urinothorax is one of the rare causes of pleural effusion of extra-vascular origin, commonly presents with a transudative pleural effusion due to obstruction, injury or trauma to the genitourinary tract. It is not a common cause which increases the likelihood of underdiagnosis or misdiagnosis. Herein, we are presenting a 65-year-old gentleman who presented with urinary symptoms found to have urinothorax secondary to urinary tract obstruction by benign prostatic hypertrophy.