Multivariate logistic regression analysis showed that PTBE was an independent predictor of CD8+ TIL levels (P = 0.001, HR = 0.176, 95%CI, 0.065–0.477; Table 4), and no association was found between meningioma WHO grade and PD-L1 expression and CD8+ TIL levels (P = 0.648, P = 0.794, respectively; Table 3 and Table 4). This evidence concerns the gene CD8A and meningioma.