CEACAM5 and non-small cell lung carcinoma: The single diagnosis of NSCLC, the AUC was 0.66, with a sensitivity of 52.63% and a specificity of 76.29%.The combined diagnosis using CEA, SCC, Cyfra21–1 and circ_0070354, the AUC was 0.73, with a sensitivity of 63.91% and a specificity of 84.54%.