Upon admission for endoscopic treatment, the patient’s general health was good, and according to laboratory tests, there was no elevation in tumor markers, including carcinoembryonic antigen (CEA), carbohydrate antigen (CA) 19-9, and alpha-fetoprotein (AFP), and the serum was negative for Helicobacter pylori antibody (<3 U/ml, Anti-Helicobacter pylori IgG antibody, EIA kit. The gene discussed is CEACAM5; the disease is neoplasm.