PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 80-100% Life expectancy: At least 6 months Hematopoietic: Hematocrit at least 30% WBC at least 3,000/mm3 Hepatic: Hepatitis B and C negative Renal: Not specified Other: Not pregnant or nursing No active serious infection No active autoimmune disease HIV negative No other malignancy within the last 5 years except squamous cell carcinoma of the skin, carcinoma in situ of the cervix, superficial bladder carcinoma, early stage prostate cancer, or noninvasive melanoma No active severe depression or psychiatric disorder with psychotic symptoms No uncontrolled thyroid abnormalities