PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: At least 12 weeks Hematopoietic: WBC at least 3,000/mm3 Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin normal unless due to Gilbert's syndrome SGOT or SGPT no greater than 2 times upper limit of normal Renal: Creatinine no greater than 1.5 mg/dL OR Creatinine clearance at least 60 mL/min Pulmonary: DLCO at least 80% predicted Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No other concurrent significant underlying medical or psychiatric illness (e.g., active infection) that would preclude study treatment or exceptionally increase risk of toxicities No other prior malignancy within the past 5 years except curatively treated nonmelanoma skin cancer, carcinoma in situ of the cervix, or superficial bladder cancer