In the KEGG analysis, 10 pathways were enriched by genes in the purple module, including synaptic vesicle cycle, Ras signaling pathway, GABAergic synapse, morphine addiction, cell adhesion molecules (CAMs), PI3K-Akt signaling pathway, retrograde endocannabinoid signaling, gastric cancer, histidine metabolism, and renin-angiotensin system (Table 3, Figure 4(b)). This evidence concerns the gene REN and gastric cancer.