Pulmonary segregation is a congenital disorder not related to heredity, but is a malformation of the lungs during development, which is detected during an x-ray chest film or a lung CT. The developmental malformation of the lungs manifests itself as an abnormal part of the lung tissue that is supplied by the arteries of the body circulation. This part of the lung tissue forms a cystic mass that can communicate with the bronchi, but has no clearance of normal tissue. Therefore, recurrent localized infections may occur, and anti-inflammatory therapy may relieve the symptoms, but the symptoms may reappear shortly afterwards. Those that do not communicate with the bronchi do not show whistling symptoms and are usually not easily detected, although sometimes they can be detected on normal physical examination. Pulmonary isolation is divided into intralobar type and extralobar type. Intralobar type is abnormal and normal lung tissue wrapped together with bronchial communication, so that the symptoms of whistling system will appear. The extralobar type is wrapped by the abnormal pleura alone and is relatively independent of the normal lung tissue, so there are no symptoms of the inspiratory system and it is not easily detected. Pulmonary segregation is a congenital malformation of lung development, which cannot be solved by drugs. If you want to cure it, you can consider surgical removal of the diseased lung.