PATIENT CHARACTERISTICS: Age: 18 and over Performance status: SWOG 0-2 Life expectancy: Not specified Hematopoietic: Absolute granulocyte count at least 1500/mm3 Platelet count at least 100,000/mm3 Hepatic: Not specified Renal: Not specified Other: Not pregnant or nursing Fertile patients must use effective contraception No other prior malignancy within 5 years except: Adequately treated basal cell or squamous cell skin cancer Adequately treated stage I or II cancer In situ cervical cancer