Lung cavities are usually curable if they are caused by tuberculosis or lung abscess, and usually not curable if they are caused by a malignant tumor of the lung. Pulmonary cavities are a common imaging manifestation of lung disease rather than a specific disease, and are formed when diseased tissue in the lungs becomes necrotic and expels and inhales gas through the bronchial tubes, and many diseases may form pulmonary cavities in the course of development. For example, secondary tuberculosis, tuberculosis nodules in the caseous necrotic material discharge, may form lung cavity. However, it can usually be cured with prompt treatment. In the case of lung abscesses, lung cavities can usually be cured after aggressive anti-infective treatment. In case of malignant tumors of the lungs, such as bronchopulmonary carcinoma and alveolar cell carcinoma. Lung cavities are formed due to the breakage of lung mucosa, and the spread of malignant tumor is more obvious, even metastasized to the outside of lungs, in this case lung cavities usually cannot be cured. Patients with lung cavities need to undergo a series of imaging examinations under the guidance of doctors and be treated actively after the cause is clarified.