Point mutations in the human epidermal growth factor receptor 2 (HER2) gene, aberrations in the expression of estrogen (ERα and/or ERβ) and progesterone receptors (PR), and/or harmful mutations in breast cancer gene (BRCA1 and/or BRCA2) are the most recognized reasons underlying the breast cancer incidence [4, 5]. The gene discussed is BRCA1; the disease is breast cancer.