PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Karnofsky 60-100% Life expectancy: At least 6 months Hematopoietic: Hemoglobin at least 8.0 g/dL Lymphocyte count at least 300/mm3 Neutrophil count at least 1,000/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.5 times upper limit of normal Renal: Creatinine no greater than 1.6 mg/dL