It has been shown that typical features of basal-like tumours include the expression of: high molecular weight cytokeratins – CK5/6, 14, 17 (so-called basal type cytokeratins) [18,22,23], expression of epidermal growth factor receptor (EGFR), c-kit, P53, and vimentin [4,16,18,20,23,24]. The gene discussed is KRT5; the disease is neoplasm.