While the serum levels of protein induced by vitamin K antagonist-II (PIVKA-II) were 346 mAU/mL (reference range: < 40 mAU/mL), other tumor markers, including α-fetoprotein (AFP), carcinoembryonic antigen (CEA), and carbohydrate antigen 19-9 (CA19-9), were all within the reference ranges, the hepatitis virus test results were positive for hepatitis C virus (HCV) infection and preexisting hepatitis B virus infection. The gene discussed is CEACAM5; the disease is hepatitis A virus infection.