BRCA1 and breast cancer: Some specific molecular markers—such as p53, Breast Cancer Gene 1 and 2 (BRCA1, BRCA2), nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB), human epidermal growth factor-2 gene (HER2), cathepsin D, etc.—are used as investigation tools in order to determine the most effective treatment method [2].