PATIENT CHARACTERISTICS: Age: 18 to 75 Performance status: ECOG 0-2 Life expectancy: At least 12 months Hematopoietic: WBC greater than 3500/mm3 Platelet count greater than 100,000/mm3 Hematocrit greater than 30% Hepatic: Bilirubin less than 2.0 mg/dL SGOT no greater than 2 times upper limit of normal (ULN) Alkaline phosphatase no greater than 2 times ULN Prothrombin time normal Renal: Creatinine less than 2.0 mg/dL Cardiovascular: No significant cardiovascular disease No uncontrolled hypertension No congestive heart failure No uncontrolled cardiac arrhythmia No active angina pectoris No myocardial infarction in the past 12 months Pulmonary: Other: No second malignancy except carcinoma in situ of the cervix or basal or squamous cell skin cancer No autoimmune disease HIV negative No significant medical illness that would preclude compliance At least 4 weeks since prior serious infection requiring antibiotics Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception