CD4 and cancer: Interestingly, the TIMER results showed that the significant positive associations of PBX4 expression with the infiltration levels of the endothelial B cells, CD8+ T cells, CD4+ T cells, and dendritic cells were found in six cancer types (BRCA, HNSC, LIHC, LUSC, SKCM, and THYM (Figure 11C–I), while PBX4 expression was negatively related to the above four immune cells in LGG (Figure 11E) (all p < 0.05).