Intrapulmonary space-occupying lesions may be cancer or other lesions, such as tuberculosis ball, sclerosing cell tumor, cyst or vascular malformation. 1. Lung cancer: it manifests as occupying lesions in the lungs, with uneven density, non-smooth margins, and a series of malignant manifestations such as burrs, lobulation, pleural pulling, vascular clusters and vacuolar signs, and pathological examination can find malignant cells. 2. Tuberculosis ball: it is nodular caseous tissue formed in the process of development of pulmonary tuberculosis, the edge of the lesion is smooth and partially, calcification can be seen, and the surrounding satellite foci can be seen. 3. Sclerosing cell tumor: the corresponding lesion has a close relationship with blood vessels, and is found to be significantly strengthened on enhanced scanning. 4. Cysts: mainly bronchial cysts, with thin walls around and fluid in the center, and no enhancement in the center of the enhanced scan. 5. Vascular malformation: the blood vessels are tortuous and dilated, aggregated into a mass, which will also be manifested as occupying lesions, and the enhanced scan can find tortuous and dilated blood vessel shadow. Once the occupying lesions are found in the lungs and increase in size during the review process, it is necessary to consult a doctor in time for observation and standardized treatment under the guidance of clinicians.