PATIENT CHARACTERISTICS: Age: 18 to 90 Performance status: WHO 0-1 Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Liver function no greater than 1.5 times upper limit of normal (ULN) Renal: Renal function no greater than 1.5 times ULN Other: Not pregnant or nursing Fertile patients must use effective contraception No other concurrent malignancies except basocellular carcinoma No congenital or acquired immunosuppression (e.g., HIV, leukemia, lymphoma, transplant recipient) No uncontrollable or untreated urinary tract infection No chronic recurring bacterial cystitis