The results showed that the focus genes for target and digestive system cancers were ACE, PTGS2, CYP2C19, and CYP2A6, while the number of intersections with neurological diseases was 73, and the three shared a focus on ACE, PTGS2 and CYP2C19 (Figure 7, top left). The gene discussed is PTGS2; the disease is digestive system cancer.