All the laboratory data was within normal limits, including serum tumor markers, carcinoembryonic antigen (CEA), carbohydrate antigen 19–9 (CA 19–9), pancreatic cancer-associated antigen-2 (Dupan-2), s-pancreas-1 antigen (Span-1), pro-gastrin-releasing peptide (Pro-GRP), and neuron-specific enolase (NSE). Here, CEACAM5 is linked to neoplasm.