PIK3CA and hepatocellular carcinoma: It screened the first 30 pathways related to Human cytomegalovirus infection, PI3K–Akt pathway, MAPK signaling pathway, Small cell lung cancer, Non-small cell lung cancer (NSCLC), Proteoglycans in cancer, Prostate cancer, TNF signaling pathway, Hepatocellular carcinoma, IL-17 signaling pathway, Apoptosis, etc. (Fig. 5) 17–19.