PRIOR CONCURRENT THERAPY: Biologic therapy: No prior cellular support for high dose chemotherapy Chemotherapy: See Disease Characteristics No more than 6 prior courses of chemotherapy for metastatic disease At least 3 weeks since prior chemotherapy and recovered No prior high dose chemotherapy with cellular support Endocrine therapy: No concurrent steroid therapy Concurrent hormonal therapy allowed Radiotherapy: At least 3 weeks since prior radiotherapy and recovered No prior extensive pelvic radiation Surgery: Not specified Other: Recovered from acute toxic effects of any prior therapy No concurrent anticoagulation therapy