Moreover, when β-catenin and P-gp were combined in accordance with the ranking by the data from immunohistochemistry, patients with higher expression (++/+++) of both β-catenin and P-gp showed worse prognosis than patients with lower expression (−/+) in CRC (Figure 5E) and GC (Figure 5F). The gene discussed is PGP; the disease is gastric cancer.