CEACAM5 and neoplasm: On admission, assessments of tumor markers revealed a carcinoembryonic antigen (CEA) level of 1.2 ng/mL (normal limits 0.1–5.0 ng/mL) and a carbohydrate antigen 19-9 (CA19-9) level of 3.0 U/mL (normal limits 0.2–37.0 U/mL).