The blood level of the lung cancer marker NSE (24.58 ng/mL) was higher than normal (0-16.3). CEA (2.84 ng/mL; normal values 0-4.7) and CYFRA 21-1 (0.567 ng/mL; normal values 0-3.3) levels were normal. Here, CEACAM5 is linked to lung carcinoma.