PATIENT CHARACTERISTICS: Age: 20 to 80 Performance status: Not specified Hematopoietic: WBC at least 3,000 Platelets at least 100,000 Hct at least 25% Hepatic: Bilirubin less than 1.5 mg/dl Renal: Creatinine less than 2 mg/dl OR BUN less than 40 mg/dl Other: No other serious, life-threatening illness No second malignancy within 5 years except nonmelanomatous skin cancer outside the planned radiotherapy field