PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior chemotherapy except in the adjuvant, neoadjuvant, or radiosensitizing setting No prior chemotherapy for recurrent or persistent disease after definitive local therapy At least 6 months since prior methotrexate or paclitaxel Endocrine therapy: Not specified Radiotherapy: See Disease Characteristics At least 4 weeks since prior radiotherapy Surgery: See Disease Characteristics Recovered from prior surgery