肺癌是呼吸系统很常见的一种恶性肿瘤，肺癌的发病原因目前还不是十分明确，

Lung cancer is a very common malignant tumor of the respiratory system. The cause of lung cancer is not yet clear. It may be related to genetic factors, gene mutations and environmental pollution. Especially people with a history of smoking may have a higher incidence of lung cancer. However, lung cancer also occurs in female patients without a history of smoking, so smoking is not the only cause of lung cancer. The occurrence of lung cancer is the result of a comprehensive effect. There is no way to completely prevent it. It is good to avoid smoking as much as possible, and to avoid inhalation of dust and second-hand smoke. It is necessary to do a lung CT examination regularly every year, which can be found by low-dose CT scan Whether there are space-occupying lesions in the lungs, it can be used for early screening of lung cancer, and the effect of radical surgery for early lung cancer is still very good. Smoking is undoubtedly the main cause of lung cancer.

Lung cancer is a common respiratory system. The cause of lung cancer is not very clear. It may be related to genetic factors, gene mutation and environmental pollution. Especially those with smoking history may have higher incidence rate of lung cancer. But there are also lung cancer in female patients without smoking history, so smoking is not the only cause of lung cancer. The occurrence of lung cancer is the result of comprehensive effects. There is no way to completely prevent it. It is beneficial to avoid smoking as much as possible. It is also necessary to avoid inhaling dust and second-hand smoke. Lung CT examination needs to be done regularly once a year. Through low-dose CT plain scan, it can find out whether there are space occupying diseases in the lung. It can be used for early screening of lung cancer. The curative effect of surgery for early lung cancer is still very good. Smoking is undoubtedly the main cause of lung cancer.<br>

Lung cancer is a common malignant tumor of respiratory system. The cause of lung cancer is not very clear at present, which may be related to genetic factors, gene mutation and environmental pollution. Especially people with a history of smoking may have a higher incidence of lung cancer, but there are also cases of lung cancer among female patients without a history of smoking, so smoking is not the only pathogenic factor of lung cancer. The occurrence of lung cancer is the result of comprehensive action, so there is no way to prevent it completely. It is beneficial to avoid smoking as much as possible, and avoid inhaling dust and secondhand smoke. It is necessary to have a regular lung CT examination every year. If there is any space-occupying lesion in the lung, it can be used for early screening of lung cancer. The effect of radical surgery for early lung cancer is still very good. Smoking is undoubtedly the main cause of lung cancer.