Lung tumor markers mainly include five items, usually through the early morning fasting blood to detect the value of these five indicators in the serum, some patients with pleural effusion, or pericardial effusion, etc., can also be detected in the effusion of the value of these five indicators. The five hematological tumor markers for lung tumors include neuron-specific enolase, which is used to assist in the diagnosis of neuroendocrine tumors. Squamous cell carcinoma antigen, used primarily to aid in the diagnosis of squamous lung cancer. Glycoantigen 125, used to aid in the diagnosis of lung adenocarcinoma. Cytokeratin, used to aid in the diagnosis of squamous lung cancer. Carcinoembryonic antigen is a broad-spectrum tumor marker. If abnormal elevation of lung tumor markers is detected by drawing fasting blood or fluid, it is generally recommended to go to the hospital as soon as possible for further examination by the doctor, and biopsy, pathology, immunohistochemistry and other tests are needed if necessary.