CDCA4 and cancer: Furthermore, GSEA indicated that in the high or low CDCA4 expression group, PD-L1 expression and PD-L1 checkpoint pathway in cancer, Fc gamma R-mediated phagocytosis, intestinal immune network for IgA generation, homologous recombination, proteasome, DNA replication, RNA transport, cell cycle and Spliceosome were enriched (Figures 5A–I).