PATIENT CHARACTERISTICS: Age: 18 to 60 Sex: Female Menopausal status: Not specified Performance status: Karnofsky 80-100% Life expectancy: At least 6 months Hematopoietic: WBC at least 3,000/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.5 times normal SGOT no greater than 2.5 times normal Renal: Creatinine no greater than 1.8 mg/dL Creatinine clearance at least 60 mL/min Cardiovascular: Systolic ejection fraction at least 50% No significant cardiovascular disease or cardiac arrhythmia requiring drug or device intervention Pulmonary: DLCO and FEV1 greater than 50% Neurologic: No significant peripheral neuropathy or CNS disease Other: Fertile patients must use effective contraception Not pregnant or lactating Not HIV positive No concurrent active infections requiring IV antibiotic therapy No significant gastrointestinal bleeding or uncontrolled peptic ulcer disease No history of inflammatory bowel disease No clinically significant autoimmune disease No other serious illness or medical condition