Laboratory investigations showed anemia (white blood cells, 5.56 × 103/mm3; red blood cells, 2.68 × 103/mm3, platelets 30.8 × 103/mm3), slightly elevated lactose dehydrogenase (344 U/L; normal level 105–210 U/L), and tumor marker levels of 71 U/mL of Carbohydrate antigen 19‐9 (CA19‐9, normal level ≦ 37 U/mL), 2.6 ng/mL of CEA (normal level ≦ 5.0 ng/mL), and 36.4 ng/mL of cytokeratin 19 fragment (CYFRA, normal level ≦ 3.5 ng/mL). The gene discussed is CEACAM5; the disease is neoplasm.