CD163 and glioblastoma: By IHC of 19 GBM samples, Hide et al. compared cellular composition from three different regions—the tumor mass, the border area, and the peripheral area—showing that oligodendrocyte lineage cells (OLCs), including OPCs (Olig2+), together with macrophages/microglia (Iba1+ and CD163+), characteristically gather in the border areas; more specifically, in the invasion front [79,80].