PATIENT CHARACTERISTICS: Age: 15 to 55 Performance status: ECOG 0 or 1 Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 2.0 mg/dL SGOT and SGPT no greater than 3 times normal PT and PTT normal Renal: Creatinine no greater than 2.0 mg/dL Creatinine clearance at least 60 mL/min Cardiovascular: LVEF at least 45% by MUGA scan or echocardiogram No myocardial infarction within the past 6 months No arrhythmias unless medically controlled Pulmonary: FEV1 at least 50% predicted DLCO at least 50% predicted Other: No diabetes mellitus or thyroid disease unless medically controlled No active serious infection HIV negative Not pregnant or nursing Negative pregnancy test