As shown in Figure 4 and Table 6, the detection rates of LunX (92.9%), CK19 (100%), CEA (85.7%), VEGF-C (78.6%) and hnRNP A2/B1 (100%) in the malignant pleural fluid from NSCLC patients were all high. Here, CEACAM5 is linked to non-small cell lung carcinoma.