“…The fact that patients in the TNBC group "poorly differentiated, common in those over 50 years of age and associated with BRCA1 gene polymorphism, which corresponds to approximately 10% of invasive BC", do not respond to hormone therapy, and the combination of chemotherapy and radiotherapy may be a problem in individuals with highly active DNA repair pathways [ 4 ]. Radiotherapy to breast cancer patients is applied at almost every stage to reduce the risk of recurrence after the surgery and to alleviate the symptoms caused by cancer that has metastasized to other parts of the body.…”