It often affects all lobes of the lungs. Pulmonary sequestration is a congenital anomaly of the lung in which a part of the lung has no discernible connection with the bronchial tree, and the blood supply to that portion is anomalous. It occurs more commonly on the left side. A young patient may be asymptomatic, and the anomaly is found on a chest X-ray. Older children may present with recurrent pneumonia.
Bronchial atresia is a rare anomaly presenting as recurring lung infections.
The involved lobe of the lung is cystic and overinflated. Treatment is removal of the involved lung lobe. Pulmonary cyst is a cystic formation in one lobe of the lung. Large cysts will create air trapping and respiratory distress in infancy. In older children, they can become infected.