PDGFRA and diffuse midline glioma: Notably, all DCGs were clustered into either of two methylation groups; two DCGs with H3F3A K27M mutation were clustered together with diffuse midline glioma, K27M-mutant (the “K27” group), whereas all of the other 12 DCGs were clustered in the “RTK I (PDGFRA)” group.