We also screened the protein–protein interaction (PPI) network in the STRING database using the top 40 DEGs and CNTD2. Most of the downregulated genes and the upregulated genes interact in the PPI network (Figure 8B), and CDC20, MYB, CEACAM6, and MMP9 were all reported to be associated with cancer. The gene discussed is CCNP; the disease is cancer.