CTICasesBronchial Atresia
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Imaging findings
Chest radiograph demonstrates a well-defined peripheral nodule in the left lower lobe. High-resolution CT shows subsegmental bronchial atresia in the superior segment of the left lower lobe, characterized by a mucoid-filled branching bronchocele (appearing as a nodule) surrounded by an area of hyperlucent, hyperinflated lung parenchyma with decreased vascularity due to collateral ventilation.
Key takeaways
Congenital bronchial atresia is a benign developmental anomaly resulting from localized obliteration of a segmental or subsegmental bronchus. The pathognomonic imaging triad consists of a central mucoid impaction (bronchocele), distal lung hyperlucency, and oligemia. It is typically an incidental finding and requires no treatment once correctly identified.
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