Finally, for a number of other tumor-related biomarkers, such as GCS, CYP1A1, SOX10, GATA3, NF-κB, p63, CK5, CK5/6, CK14 and CK17, no association was found across several studies between expression levels and pCR rate [26,33,40,41,56]. This evidence concerns the gene KRT5 and neoplasm.