The tumor markers were carcinoembryonic antigen (CEA) 1.1 U/mL, carbohydrate antigen 19–9 (CA19-9) 5.1 U/mL, alpha-fetoprotein (AFP) 3.0 ng/mL, neuron-specific enolase (NSE) 9.0 ng/mL, and pro-gastrin releasing peptide (pro-GRP) 44.3 pg/mL, all within the normal range. Here, CEACAM5 is linked to neoplasm.