Late urologic complication of an abdominal gunshot wound.

An unusual late complication of an abdominal gunshot wound is presented. It consisted of an acute hydronephrosis of the left kidney by a BB-type bullet that migrated into the ureter of a 11-year-old boy 1 month after he was injured in the left flank, causing its complete obstruction. A percutaneous nephrostomy was performed and, with the help of a basket-type catheter, the bullet was removed. To our knowledge this is the first case reported of this rare complication treated by this technique.