CD8A and central nervous system cancer: In order to explore the distribution, expression and prognostic characteristics of different types of immune cells in different immune subtypes of glioma (S3 Table); Kaplan-Meier survival curve analysis and cluster analysis showed that B lineage, Myeloid dendritic cells, Neutrophils and CD8 T cells were used as prognostic risk factors in the CGGA database, while Cytotoxic lymphocytes and Monocytic lineage were used as prognostic protective factors (Fig 3C).