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Expression patterns and diagnostic value of serum CEA in NSCLC. Compared to healthy controls (3.37 ± 2.74 ng/mL), NSCLC patients exhibited elevated levels of serum CEA (14.82 ± 17.24 ng/mL). Student t test revealed significant differences (A). ROC curve demonstrated that serum CEA could discriminate between NSCLC patients and healthy individuals (B). CEA = carcinoembryonic antigen, NSCLC = non-small cell lung cancer, ROC = receiver operating characteristic.
