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. Here, CYCS is linked to hepatitis B virus infection.