In the present study, when comparing the expression of the 11 selected genes betweenpre-NACT biopsy samples (n=98) and post-NACT residual tumor samples (n=32), we founda lower expression of the genes BRCA2 (P=0.009),ATM (P=0.004), FANCA (P=0.001), andPARP1 (P=0.011) in residual tumor samples. This evidence concerns the gene BRCA2 and neoplasm.