Three months postoperatively, the levels of tumor markers—carcinoembryonic antigen (CEA), CA19-9, DUPAN-2, and SPan-1 in peripheral blood were 5.1 ng/mL (< 5.0 ng/mL), 619 U/mL (< 37 U/mL), 1100 U/mL (≤ 150 U/mL), and 160 U/mL (≤ 30 U/mL), respectively. The gene discussed is CEACAM5; the disease is neoplasm.