To further substantiate this association, we confirmed the correlation between CKAP2 expression and survival rates of GC patients using an external cohort obtained from the GEO database, as depicted in Figure 2B. Furthermore, we examined the association between PAK4 expression and the prognosis of GC patients, with the results further corroborated by the GEO database. The gene discussed is PAK4; the disease is gastric cancer.