PATIENT CHARACTERISTICS: Age: 18 and over Performance status: SWOG 0-2 Life expectancy: Not specified Hematopoietic: WBC at least 3,500/mm3 Absolute neutrophil count at least 1,200/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.5 times upper limit of normal SGOT no greater than 1.5 times upper limit of normal Renal: Creatinine clearance at least 20 mL/min Cardiovascular: No unstable congestive heart failure No active angina No unstable cardiac arrhythmias Pulmonary: FEV1 at least 1.0 liter Also See Disease Characteristics Other: No uncontrolled peptic ulcer disease No active infection No prior malignancy except adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, or other cancer for which the patient has been disease free for 5 years Not pregnant or nursing Adequate contraception required of all fertile patients