He was asymptomatic, and laboratory examinations revealed that the patient had a normal liver function and coagulation with hepatitis B virus DNA level of 3.2 log IU/ml; positive and negative serologic markers for hepatitis B envelope antibody and envelope antigen, respectively, and the tumor marker levels were within normal ranges [carcinoembryonic antigen, CEA (1.8 U/ml; normal range < 5.0 U/ml) and CA19-9 (9.9 U/ml; normal range < 37 U/ml)]. This evidence concerns the gene CEACAM5 and neoplasm.