Of 242 NSCLC patients, information of CEA level was available for 115 patients (median ± IQR: 9.90 ± 28.64 ng/ml), and CYFRA 21-1 level was available for 85 patients (median ± IQR: 3.75 ± 4.46 ng/ml). Here, CEACAM5 is linked to non-small cell lung carcinoma.