CEACAM5 and neoplasm: Serum levels of tumor markers including carcinoembryonic antigen (CEA; 1.0 ng/mL), carbohydrate antigen 125 (CA125; 59 U/mL), and carbohydrate antigen 19–9 (CA19–9; 9 U/mL) were within normal range, but that for squamous cell carcinoma antigen (SCC; 2.0 ng/mL) was elevated.