PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: Eligible patients may have received prior chemotherapy in metastatic or adjuvant setting with the following exceptions: At least 12 months since prior fluoropyrimidine therapy At least 12 months since prior taxane therapy Only 1 previous chemotherapeutic regimen in the metastatic setting Endocrine therapy: Not specified Radiotherapy: At least 4 weeks since prior radiotherapy Surgery: Not specified