PATIENT CHARACTERISTICS: Age: 15 to 65 Performance status: Karnofsky 70-100% OR ECOG 0-1 Life expectancy: At least 8 weeks without transplantation Hematopoietic: Granulocyte count at least 1,500/mm3 Platelet count at least 150,000/mm3 Hepatic: Bilirubin no greater than 1.8 mg/dL SGOT and SGPT less than 2 times normal No high risk for veno-occlusive disease of the liver Renal: No severe renal dysfunction unless due to tumor invasion Creatinine no more than 1.5 mg/dL Creatinine at least 60 mL/min Cardiovascular: No severe cardiovascular dysfunction unless due to tumor invasion No myocardial infarction within the past 6 months No symptoms of major heart disease Ejection fraction at least 50% by MUGA scan Essential hypertension controlled with medication allowed Pulmonary: No severe pulmonary dysfunction unless due to tumor invasion DLCO at least 50% normal No symptomatic obstructive or restrictive pulmonary disease Other: No insulin-dependent diabetes mellitus No uncompensated major thyroid or adrenal dysfunction No active infection HTLV-III negative (no AIDS-related complex)