It revealed that ABCA1 expression had a positive correlation with the abundance of T helper cells, T gamma delta, macrophages, T effector memory cells, T central memory cells, neutrophils, activated dendritic cells (aDC), eosinophils and Th17 cells in glioma (p < 0.05) (Fig. 6a). This evidence concerns the gene ABCA1 and central nervous system cancer.