CEACAM5 and neoplasm: Serum levels of carcinoembryonic antigen (CEA), carbohydrate antigen 15-3 (CA15-3), CA125, and squamous cell carcinoma antigen (SCC-Ag) were 13.57 ng/mL, 96.6 U/mL, 44.2 U/mL, and 62.39 ng/mL, respectively, indicating elevated tumor biomarkers compared to healthy individuals.