Malacoplakia of the urinary bladder was seen in a 69-year-old woman with haematuria. We firstly treated her with distigmine bromide, ascorbic acid and trimethro-prim-sulfamethoxazole. Haematuria subsided but the lesion did not change after 6 weeks. Thereafter we tried enoxacine therapy. Eight weeks after the medication the tumorous lesion disappeared. Bladder biopsy performed 4 months after the initiation of the treatment revealed predominantly granulation tissue. We can find no previous case treated successfully with long-term enoxacine.