Multiple cystic translucent shadows in both lungs may be caused by pulmonary cysts, bronchiectasis, tuberculosis and so on. 1. Pulmonary cysts: due to congenital developmental anomalies and other causes of pulmonary cysts, for the lung cystic lesions, mainly manifested in the patient’s lung air-containing cystic cavities, so it can be manifested as multiple cystic translucent shadows in both lungs, but some patients have liquid components in the cystic cavities. 2. Bronchial dilatation: due to recurrent infections, patients with bronchial dilatation can be divided into columnar bronchial dilatation and cystic bronchial dilatation, cystic bronchial dilatation with a large diameter can be manifested as multiple cystic translucent shadows in both lungs. Patients often have the clinical manifestations of repeated coughing and coughing up sputum. 3. Tuberculosis: When tuberculosis is caused by infection with Mycobacterium tuberculosis, the invasion of Mycobacterium tuberculosis into lung tissues can cause cystic cavities in the lungs, which can be manifested as multiple cystic translucent shadows in both lungs. In addition, multiple cystic lucencies in both lungs can also be caused by lung cancer, which is often accompanied by coughing up sputum, hemoptysis, emaciation, and fatigue. When the patient has multiple cystic lucencies in both lungs, he/she should go to the hospital for further examination and treatment under the guidance of professional doctors.