In particular, increased NCAPG2 levels were found to have a significant correlated various infiltrating inflammatory cells, including macrophages, M2 macrophages, regulatory NK cells, cancer-associated fibroblasts (CAFs), T cells (Tregs), CD8+ T cells, CD4+ T cells, B cells, monocytes, neutrophils, and others, in BRCA, CESC, ESCA, DLBC, HNSC, GBMLGG, GBM, KIRC, KIRP, KIPAN, KICH, LIHC, LUAD, LGG, LUSC, OV, MESO, STAD, SARC, STES, SKCM, PRAD, PAAD, THYM, TGCT, and THCA (P < 0.05). This evidence concerns the gene CD8A and cancer.