Breast cancer is classified into four molecular subtypes, namely, luminal A, luminal B, human epidermal growth factor receptor 2 (HER2)-positive, and triple-negative breast cancer (TNBC) according to the status of the estrogen receptor, progesterone receptor, and HER2 (Perou et al., 2000). This evidence concerns the gene ERBB2 and triple-negative breast carcinoma.