In this analysis, we identified subtype‐specific events for Epi‐LumB tumors involving either DNA copy number loss or CpG promoter methylation over DZIP1, TNFSF11, ZIC5, COL4A2, COL4A1 and PCDH8 indicating candidate tumor suppressor genes (Figure 5A; Supplementary Figure 3). Here, COL4A1 is linked to neoplasm.