BC can be classified into luminal A and B (LumA and LumB, respectively), human epidermal growth factor receptor 2 (HER2)-enriched and triple negative breast cancer (TNBC), according to the expression (or absence) of estrogen, progesterone and HER2 receptors and the level of Ki67 [23]. This evidence concerns the gene ERBB2 and triple-negative breast carcinoma.