Open instillation of formalin for cyclophosphamide-induced hemorrhagic cystitis in a child.

A child with massive hematuria, produced by cyclophosphamide-induced cystitis, was treated with open bladder instillation of formalin. To prevent vesicoureteral reflux, we inserted two Fogarty catheters. Intraoperative retrograde cystography was made to confirm that there was no reflux, extravasation or passage of contrast per urethra. The postoperative result was good with cessation of hematuria.