To determine the antitumor efficacy and the safety of SU-014813 at a dose of 100 mg orally once daily in patients with Metastatic Breast Cancer

Inclusion Criteria:

• Histologically or cytologically proven diagnosis of metastatic breast adenocarcinoma that is not amenable to surgery, radiation, or combined modality therapy with curative intent.
• Must have received prior treatment with an anthracycline and a taxane either concurrently or sequentially in the adjuvant and/or advanced disease treatment settings. Patients may have received as many as 2 other chemotherapy regimens in the advanced disease setting. Patients whose tumors are Her-2-positive must have received prior trastuzumab therapy. Prior hormonal therapy or immunotherapy in the adjuvant and/or advanced/metastatic disease settings is permitted. Prior treatment with surgery, radiotherapy, chemoembolization therapy, or cryotherapy is allowed if these therapies did not affect the areas of measurable disease.

Exclusion Criteria:

• Prior treatment with >/= 3 regimens of chemotherapy in the metastatic disease setting beyond those containing anthracyclines and taxanes
• Uncontrolled brain metastases, spinal cord compression, or carcinomatous meningitis, or new evidence of brain or leptomeningeal disease. Patients should have completed surgery or radiation therapy for existing brain metastases, should not have documented increase in size over the previous 3 months and should be asymptomatic