Additionally, we compared mean methylation values among the studied tumor subtypes by using ANOVA and observed that NPY, PRKCDBP, and RASSF1 showed lower methylation levels in the basal-like tumor subgroup when compared with other subtypes, and that DBC1, HS3ST2, FGF2, and CD40 displayed higher hypermethylation levels in the luminal B subtype than in the other subgroups. The gene discussed is CD40; the disease is neoplasm.