PATIENT CHARACTERISTICS: Age: 16 and over Sex: Male Performance status: WHO 0-2 OR Karnofsky 50-100% Life expectancy: No limits on life expectancy due to severe non-malignant disease Hematopoietic: Not specified Hepatic: Not specified Renal: Not specified Cardiovascular: No severe cardiac disease that would interfere with study therapy Pulmonary: No severe pulmonary disease that would interfere with study therapy Other: HIV negative No severe neurologic or metabolic disease that would interfere with study therapy No psychological, socioeconomic, or geographic circumstances that would preclude study No other concurrent malignancy