Phase II Study of Genomically Guided Radiation Dose Personalization in the Management of Triple Negative Breast Cancer

Inclusion Criteria: * Participants should have undergone breast conservation therapy with a lumpectomy and axillary evaluation to consist of a sentinel node biopsy or axillary dissection * Confirmation of Triple Negative (TN) breast cancer by tissue biopsy * Adequate tissue to calculate RSI * To fulfill the requirement of HER2- disease, a breast cancer must not demonstrate, at initial diagnosis or upon subsequent biopsy, overexpression of HER2 by either IHC or in-situ hybridization as defined by the ASCO / CAP Guidelines * To fulfill the requirement of hormone receptor (HR)- disease, a breast cancer must express (\<10%), by immunohistochemistry (IHC), the hormone receptors (estrogen receptor \[ER\] and progesterone receptor \[PR\]) as defined in the American Society of Clinical Oncology (ASCO) / College of American Pathologists (CAP) Guidelines * Life expectancy \>16 weeks * KPS ≥ 70 * Age ≥ 18 years * Participants with surgery within 14 days should have recovered from all effects of the surgery and be cleared by their surgeon * There is no limit on prior systemic therapies * Women of childbearing potential and sexually active males must commit to the use of effective contraception while on study * Ability to sign an informed consent form, which can be signed by a family member or health care proxy. Informed consent must be given before study enrollment Exclusion Criteria: * Major surgery or significant traumatic injury that has not been recovered from 14 days before study initiation * Women who are pregnant or breastfeeding * Positive surgical margins * History of allergy or hypersensitivity to any of the study drugs or study drug components * Metastatic breast cancer