Basal-like breast carcinomas have variable expressions of basal cytokeratins (CKs) (CK5/6, CK14, CK17), vimentin, myoepithelial markers (smooth muscle actin, p-63), CD117, P-cadherin and/or human EGFR (HER1/EGFR) [8-13]. This evidence concerns the gene KRT5 and breast carcinoma.