CEACAM5 and neoplasm: Serum tumor marker levels were carcinoembryonic antigen (CEA): 2.0 ng/mL (normal < 37.0), CA19–9: 459.2 U/mL (normal < 37.0), SCC: 18.9 ng/mL (normal < 1.5), and CA125: 329.9 U/mL (normal < 35.0).