A total of 2095 differentially expressed proteins (DEPs) were found when comparing BrMs and NATs (BrM/BrM‐NAT, n = 48), while 271 DEPs were identified in gliomas compared to NATs (Glioma/Glioma‐NAT, n = 22) (Figure2A; Figure S4A–C; Table S2, Supporting Information). Here, BRD2 is linked to glioma.