CEACAM5 and neoplasm: Examination of serum tumor markers revealed that the carbohydrate antigen 19-9 (CA 19-9) level was 2145 U/L, while the levels of carbohydrate antigen 125 (CA 125) and carcinoembryonic antigen (CEA) were 209 U/L and 8.1 U/L, respectively.