CEACAM5 and squamous cell carcinoma: The α-fetoprotein (AFP) serum levels were elevated to 9,859.76 ng/ml (normal level, <10 ng/ml); cancer antigen 125 (CA-125) levels were elevated to 51.90 U/ml (normal level, <35 U/ml); the serum β-human chorionic gonadotropin (β-hCG; normal level, <10 mIU/ml), carcinoembryonic antigen (CEA; normal level, <5.0 ng/ml), carbohydrate antigen 19-9 (CA 19-9; normal level, <37 U/ml) and squamous cell carcinoma (SCC) antigen (normal level, <1.5 ng/ml) were within the normal ranges.