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Veliparib and Radiation Therapy before Surgery in Treating Patients with Stage IIB-IV Breast Cancer with Incomplete Response to Chemotherapy

Trial Status: closed to accrual

This phase I trial studies the side effects and best dose of veliparib when given together with radiation therapy before surgery in treating patients with stage IIB-IV breast cancer with incomplete response to chemotherapy. Veliparib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Radiation therapy uses high energy x-rays to kill tumor cells. Giving veliparib together with radiation therapy before surgery may kill more tumor cells.