GPR158 expression was highest in the CNS (n = 5) and in oligodendrogliomas, followed by astrocytomas (p < 0.0001), and significantly lower in eGBM and GBM (p < 0.0001; Fig. 7a, Supplementary Figure 3A-C). The gene discussed is GPR158; the disease is astrocytoma (excluding glioblastoma).