CEACAM5 and non-small cell lung carcinoma: For confirming the value of FTO in diagnosing NSCLC with LNM, we drew corresponding ROC curves and found that in diagnosing NSCLC with LNM, FTO had an AUC of 0.718, while CEA and CYFRA21-1 had AUCs of 0.600 and 0.631, respectively (Figures 4(a)–4(c)).