Blood test indicated slight anemia of hemoglobin (10.2 g/dL; normal range, 11.6–14.8 g/dL) and increased levels of the carcinoembryonic antigen (CEA) and cancer antigen 19-9 (CA19-9) to 406.1 ng/mL (normal range, 0–5.0 ng/mL) and 66 U/mL (normal range, 0–37.0 U/mL), respectively. Here, CEACAM5 is linked to anemia.