What are the X-ray manifestations of alveolar carcinoma?

Alveolar carcinoma belongs to peripheral lung cancer, which has special X-ray manifestations and can be divided into three types: ① Nodular type: solitary spherical lesion with clear outline in lung field of vision, in which vesicular sign can be seen, which is a sign of residual alveoli and bronchiectasis and often appears around? Rabbit ear sign? Or the limitation of adjacent pleura? v？ Shape contraction changes. ② Infiltrative type: It is the same as the infiltrative consolidation of general pneumonia, with blurred margin, often showing lobular, pulmonary segment or lobar changes, in which bronchial inflation period can be seen sometimes, and chest radiographs can be seen. ③ Diffuse type: Both lungs are multiple millet-shaped, nodular or small invasive patches, which are unevenly distributed, especially in the middle and lower lung fields, but can also be confined to some lung fields. The lesions gradually increase and merge, and larger primary lesions can often be found.