The basal-like/triple-negative breast cancer is a poorly differentiated and aggressive breast cancer subtype, characterized by the expression of a stem cell-like gene profile [27,28], by the cytoplasmic localization of beta-catenin [29–31] and by CA9 and SNAI2 gene overexpression [32,33]. The gene discussed is SNAI2; the disease is triple-negative breast carcinoma.