The results of DAVID functional annotation clustering (FAC) of differentially expressed genes in the liver tissue showed that the most enriched pathway clusters, with an enrichment score of 2.67, was ‘hepatitis C, followed by ‘chemokine signaling pathway’, ‘endometrial cancer’, ‘prolactin signaling pathway’, ‘EGFR tyrosine kinase inhibitor resistance’, and ‘B-cell receptor signaling pathway’. The gene discussed is PRL; the disease is endometrial cancer.