Pediatric genitourinary trauma.

Trauma is the leading cause of death in children in the United States, and blunt trauma is responsible in most cases. The kidney is the urogenital organ most frequently injured. Renal injuries are classified on a scale of I to V. Only grades IV and V injuries need operative intervention. CT is the preferred diagnostic imaging modality in most instances. Cystography and urethrography are necessary to diagnose bladder and ureteral injuries. Genital injuries sometimes are produced by sexual abuse, and the clinician must be alert to this possibility.