Blood tests showed anemia with hemoglobin levels, 9.9 g/dl (normal range, 12.5–15 g/dl); platelet count, 360,000 μl (normal range, 150,000–450,000 μl; relative lymphocytosis (70%; normal range, ≤20%); creatinine levels, 1.3 mg/dl (normal range, 0.6–1 mg/dl); white blood cell count, 18.0×103 μl (range, 4.3–10.8×103 μl); and oncomarker carcinoembryonic antigen (CEA) levels, 7.5 ng/ml (normal range, 2.5–5 ng/ml). Here, CEACAM5 is linked to anemia.