PDGFRA and glioblastoma: By further exploring a glioblastoma repository [89], Bhaduri et al. observed that individual tumours co-expressed a variety of GSC marker genes such as PROM1 (CD133), PDGFRA, NES and OLIG2 (Figure 4D), which also confirmed the expression found at the single cell transcriptomic level (Figure 4B).