Translucent shadows in the lungs refer to increased air content in the lungs and are commonly seen in limited emphysema, pneumothorax, pulmonary alveoli, and intrapulmonary cavernous formation. 1. Limiting emphysema: emphysema, chronic obstructive pulmonary disease, pulmonary heart disease, etc. can be seen as limiting emphysema, appearing as translucent shadow in the upper lobe of the right lung. 2. Pulmonary alveolus: congenital or acquired causes of the formation of the upper lobe of the right lung alveolus can appear in the upper lobe of the right lung translucent shadow, rupture of the alveolus pneumothorax can also appear in the upper lobe of the lung translucent shadow, the volume of small alveolus can not be treated, does not affect the function of the lungs, the volume of large alveolus can be treated with surgical procedures. 3. Lung cavity: when lung abscess, tuberculosis, lung cancer combined with cavity, there may be translucent shadow in the upper lobe of the right lung. When the physical examination finds the bright shadow in the upper lobe of the right lung, there is no need to be nervous in general, but if it is combined with respiratory symptoms, it is recommended to consult a doctor in time, and treat the cause of the disease under the guidance of a specialist.