CD8A and cancer: Furthermore, the expression level of TKTL1 exhibits noteworthy positive associations with the levels of infiltrating CD8+ T cells in 12 different cancer types, 17 types of cancer that involve CD4+ T cells, 14 types of cancer that involve macrophages, 16 types of cancer that involve neutrophils, and 18 types of cancer that involve dendritic cells (Supplementary Table S1 and Figure S2).