CD8A and glioblastoma: Moreover, multiple immune deconvolution analysis of GBM-infiltrating leukocytes showed a statistically significant positive correlation between the expression of the CD8 gene, and the genes associated with TRM T cells (Figure 5): in detail, a statistically significant positive correlation was found between the abundance of CD8 TILs and the ITGAE (p = 0.002410; Rho = 0.257).