CEACAM5 and non-small cell lung carcinoma: The ROC curves for ITGA2B indicated a higher diagnostic effect of NSCLC in CEA-negative patients than CEA-positive patients (CEA- vs all controls: AUC = 0.951, 0.907-0.996; CEA+ vs all controls: AUC = 0.909, 0.873-0.946.