Lung non-small cell carcinoma antigen CYFRA21-1, 1.62ng/ml is not serious. The normal value of lung non-small cell lung cancer antigen is ≤3ng/m, and the above patient is 1.62ng/ml, which is within the normal range value, so it is not serious, and the patient is recommended to go to the respiratory department of the hospital for further examination. There are many indicators affecting the elevation of lung non-small cell carcinoma antigen, such as inflammation, tumor, tuberculosis infection and so on can cause the elevation of indicators, all of which can lead to non-small cell related antigen 1.62ng/ml, or mildly elevated situation. Most of the patients with lung non-small cell carcinoma are found in middle or late stage, and it has a great relationship with smoking, occupation, environmental exposure and atmospheric pollution, etc. The patients may have symptoms such as chest distension, sputum and blood, cough, fatigue, weight loss and dyspnea. If the value of pulmonary non-small cells is elevated, dynamic observation can be taken to deal with, regular follow-up observation, regularly go to the hospital for re-examination, pay close attention to the elevated, dynamic changes and so on.