Perinephric Urinoma Secondary to Malignancy in a Pediatric Patient

Perinephric urinomas commonly arise following traumatic injury or high grade obstruction from kidney stones or lower urinary tract disorders. Not only are spontaneous urinomas rare in the pediatric population, but malignancy presenting with perinephric urinomas have only been described in the adult population. In this case report, we report flank pain from a spontaneous perinephric urinoma as the presenting symptom of lymphoma in a pediatric patient.