CTICasesBronchopulmonary Sequestration (Hybrid Lesion with Bronchial Atresia)
Imaging findings
Chest radiograph and chest CT demonstrate a hyperlucent area in the left lung base associated with an aberrant, large systemic arterial feed arising from the descending thoracic aorta. There are also fluid-filled cystic components within the hyperlucent lung, consistent with an element of bronchial atresia without normal bronchial connection.
Key takeaways
Bronchopulmonary sequestration is a congenital abnormality characterized by isolated lung tissue lacking a normal bronchial connection and receiving its blood supply from a systemic artery. This entity frequently presents as a hybrid lesion showing features of bronchial atresia and congenital pulmonary airway malformation (CPAM) elements, where collateral ventilation from surrounding normal parenchyma causes hyperlucency, and retained mucus forms cystic structures.
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