DISEASE CHARACTERISTICS: Histologically or cytologically proven glandular breast cancer Metastatic or locoregionally relapsed disease for which curative surgery and/or radiotherapy is not feasible Histologic/cytologic confirmation of metastasis as feasible Progression required within the month prior to entry, whether or not it occurs on hormonal therapy No clinically detectable cerebral or meningeal involvement Measurable lesion required, including soft tissue site, lymphadenopathy, or visceral site The following are not considered measurable: Bony sites of involvement Ascites Pulmonary lymphangitic carcinomatosis Skin lesions Pathologic CEA or CA 15.3 levels Laboratory changes Pleural effusion Hormone receptor status: Not specified