Among them, 28 COL6A2 genes were significantly related to survival rate in TCGA glioma patients (P < 0.01), including 1 low-risk immunostimulatory gene (hazard ratio (HR) < 1) and 27 high-risk immunostimulatory genes (HR > 1) (Figure 13A). Here, COL6A2 is linked to central nervous system cancer.