We focused in those genes that were significantly differently methylated in the basal-like tumor subtype (HOXA9, SOX1, VAMP8, and TNFRS10D) and those that were significantly hypermethylated in the luminal B tumors (NPY, RASSF1, HS3ST2, DBC1, FGF2, CD40. This evidence concerns the gene SOX1 and neoplasm.