Early symptoms of lung adenocarcinoma include cough, sputum, dry cough without sputum, sputum with blood, hidden pain in chest, etc. Generally these symptoms are not typical. If lung adenocarcinoma can be detected at an early stage and treated with surgery in time, some patients can be cured and have a long survival time, so early detection of lung adenocarcinoma is an important measure to improve the cure rate of patients. However, since the early symptoms of lung adenocarcinoma are not typical and easy to be neglected by patients, therefore, for people with high risk of lung cancer, such as those with long-term smoking history or family history of lung cancer, once coughing and sputum and other respiratory symptoms occur, it is recommended to do chest CT and other tests as soon as possible, so as to detect lung adenocarcinoma early and take timely treatment measures.