[Pulmonary fibrosis following instillation of mitomycin C in the urinary bladder]

Intravesical prophylaxis against recurrence of bladder carcinomas using mitomycin C has proved to be an effective treatment with few side effects. No side effects involving the lungs have so far been observed with systemic administration; with intravesical use, however, this is not the case. We report a 32-year-old man in whom pulmonary interstitial fibrosis occurred after intravesical instillation of mitomycin C. The clinical picture, including the therapy, and the differential diagnosis and practical consequences are all discussed.