PATIENT CHARACTERISTICS: Age: 15 to 70 Performance status: Not specified Life expectancy: No severe limits on life expectancy due to nonmalignant disease Hematopoietic: Not specified Hepatic: Not specified Renal: Not specified Cardiovascular: No severe cardiac disease that would preclude protocol therapy Pulmonary: No severe pulmonary disease that would preclude protocol therapy Other: No severe metabolic or neurologic disease that would preclude protocol therapy No concomitant or previous second malignancy except: Nonmelanomatous skin cancer In situ carcinoma of the cervix