The serum levels of various tumor markers were elevated, including SQCC antigen, 39.7 ng/mL [normal, < 1.5 ng/mL]; cytokeratin-19 fragments, 393.6 ng/mL [normal, < 3.5 ng/mL]; and carcinoembryonic antigen (CEA), 10.7 ng/mL [normal, < 5 ng/mL]. Here, CEACAM5 is linked to neoplasm.