Moreover, the 19 overlapping genes derived from hepatitis B and pathways in cancer were discovered (Fig. 3), such as PIK3CG, CDKN1B, PIK3CD, FOS, MAPK8, AKT1, MYC, MAPK1, CREBBP, JUN, BCL2, CCND1, PIK3CA, PTEN, CYCS, PIK3CB, EP300, JAK1, and GRB2. The gene discussed is PIK3CG; the disease is cancer.