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Alisertib with or without Fulvestrant in Treating Patients with Locally Advanced or Metastatic, Endocrine-Resistant Breast Cancer

Trial Status: closed to accrual

This phase II trial studies how well alisertib with or without fulvestrant works in treating patients with endocrine-resistant breast cancer that has spread to nearby tissue or lymph nodes (locally advanced) or that has spread to other places in the body (metastatic). Alisertib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Hormone therapy using fulvestrant may fight breast cancer by blocking the use of estrogen by the tumor cells or reducing the amount of estrogen made by the body. Giving alisertib with or without fulvestrant may work better in treating patients with breast cancer.