PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 60-100% Life expectancy: Not specified Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 WBC at least 3,000/mm3 Hemoglobin at least 9 g/dL Hepatic: Bilirubin no greater than 1.5 times upper limit of normal (ULN) Alkaline phosphatase no greater than 2.5 times ULN AST and ALT no greater than 2.5 times ULN Renal: Creatinine no greater than 1.5 mg/dL Creatinine clearance at least 60 mL/min Cardiovascular: No history of clinically significant cardiac disease, serious arrhythmias, or significant conduction abnormalities Neurologic: No uncontrolled seizure disorder No active neurologic disease No neuropathy greater than grade 1 Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No other malignancy within the past 3 years except basal cell skin cancer or preinvasive carcinoma of the cervix