The domain of biomarkers utilized in cancer detection is a well-explored area with established markers like carcinoembryonic antigen (CEA), Carbohydrate antigen 125 (CA125) and Carbohydrate antigen 199 (CA199) widely employed in colon cancer, pancreatic cancer, and various other malignancies. The gene discussed is CEACAM5; the disease is colonic neoplasm.