On the contrary, in the work of Horvath et al., a very low density of “expressed” SNPs was demonstrated in the chr2 region:48000000-48999999 containing the genes PPP1R21, MSH6, FBX011, FOXN2, STON1, GTF2A1L, and LHCGR in patients with all three analyzed BC subtypes (TNBC, non-TNBC, and HER2 positive) [70]. This evidence concerns the gene PPP1R21 and breast cancer.