PATIENT CHARACTERISTICS: Age: Over 18 Performance status: Karnofsky 80-100% Life expectancy: Not specified Hematopoietic: WBC greater than 2,500/mm3 Platelet count greater than 100,000/mm3 Hemoglobin at least 10 g/dL Hepatic: Bilirubin less than 2.0 mg/dL SGOT/SGPT less than 2 times normal Renal: Creatinine less than 2.0 mg/dL Other: No other illness or condition, including innate or pharmacologic immunosuppression, that would preclude study No other malignancy within the last 5 years except adequately treated basal or squamous cell skin cancer or carcinoma in situ of the cervix HIV negative Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception during and for 6 months after the study