Expression of serum CEA, NSE and CYFRA21-1 versus the detection of lung cancer

Objective To investigate the expression of CEA, NSE and CYFRA21-1 in lung cancer, and the significance of combined determination of three tumor markers in the detection of lung cancer. Methods CEA, NSE and CYFRA21-1 levels in serum of 65 patients with lung cancer, 50 patients with benign lung diseases and 38 normal adults were measured by enzyme linked immunosorbent assay (ELISA). The association of CYFRA21-1, NSE, and CEA level with the type of lung cancer in pathology were also studied. Results In comparison, the serum levels of CEA, CYFRA21-1 were increased more obviously in patients with lung cancer than that of patients with benign lung diseases and the normal adults (P<0.01). The levels of serum and the sensitivity of CEA, NSE and CYFRA21-1 were related to pathology type. The sensitivity and specificity increased by combined measurement of CEA, NSE, and CYFRA21-1. Conclusion These findings suggest that the serum CEA, NSE and CYFRA21-1 levels is increased in patients with lung cancer, and the increasing extents is not same in lung cancer with different pathology types. CEA, NSE and CYFRA21-1 are significant in adjuvant diagnosis of lung cancer. Key words: tang neoplasms;  Tumor marker, biological