Intravesical formalin for the control of intractable bladder hemorrhage secondary to cystitis or cancer

Between November 1971 and December 1973, 10 patients with intractable urinary bleeding secondary to radiation or cyclophosphamide cystitis, or to primary or secondary bladder cancer were treated with intravesical formalin. Good results were obtained in 8 of the 10 patients, with control of bleeding for 3 to more than 36 months. There were 2 failures, both with cancer.