PATIENT CHARACTERISTICS: Age: 18 to 76 Performance status: Karnofsky 70%-100% Hematopoietic: WBC greater than 3,000 Platelets greater than 100,000 Hepatic: Bilirubin no greater than 4 mg/dL Alkaline phosphatase no greater than 1,200 U/L Coagulation tests normal Renal: Creatinine no greater than 2.5 mg/dL Other: No prior malignancy