After being analyzed in the TCGA-GBM dataset, the statistical positive correlations were observed between the SPI1 level and the genes expressed in the TAM group (C1QA: r = 0.823; C1QB: r = 0.873; C1QC: r = 0.905; SRGN: r = 0.687; TYROBP: r = 0.774) (Figure 6B), but not in the Tumor group (GAP43: r = 0.043; GPM6B: r = −0.135; SEC61G: r = −0.117; PTN: r = −0.298) (Figure S8). The gene discussed is GAP43; the disease is neoplasm.