CEACAM5 and cancer: The blood tumor markers were within reference values: carcinoembryonic antigen (CEA), 2.7 ng/mL; cancer antigen 15-3 (CA15-3), 7.3 U/mL; breast cancer antigen 225 (BCA-225), <20.0 U/mL; and National Cancer Center-stomach-439 (NCC-ST-439), <1.0 U/mL.