Lung cancer tumor markers include carcinoembryonic antigen, neurospecific enolase, squamous cell carcinoma antigen, CA125 and so on. 1 Carcinoembryonic antigen, with relatively high sensitivity to squamous cell carcinoma, can be used as the data for initial screening, prognosis and testing during treatment, and is considered as one of the more representative markers for lung cancer. 2. Neurospecific enolase, which is the preferred tumor marker for lung cancer, especially for small cell lung cancer diagnosis with outstanding specificity and sensitivity. 3. Squamous cell carcinoma antigen is mainly used in the diagnosis and prognosis of squamous cell lung cancer, if there is obvious abnormally elevated, there is a high chance of lung cancer, which needs to be further combined with other tests for diagnosis. 4. CA125, with high sensitivity and specificity for lung adenocarcinoma, can be used for diagnosis, efficacy evaluation and prognosis assessment. Lung cancer tumor markers can be used as preliminary screening, if you want to confirm the diagnosis, you still need to carry out pathological tissue biopsy.