PATIENT CHARACTERISTICS: Age: 18 to 60 Performance status: Karnofsky 80-100% Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 1.5 mg/mL, unless history of Gilbert's disease SGOT or SGPT no greater than 2 times upper limit of normal Renal: Creatinine clearance at least 50 mg/mL No history of hemorrhagic cystitis Cardiovascular: No history of coronary artery disease No poorly controlled arrhythmia or myocardial infarction Left ventricle ejection fraction at least 50% Pulmonary: Diffusion capacity at least 50% Other: Not pregnant HIV negative No second malignancy in the last 5 years except basal carcinoma of the skin