CTICasesRight Lung Agenesis
Imaging findings
Chest radiograph and CT in a 47-year-old man show complete absence of the right lung, the right main bronchus, and the right pulmonary artery, with severe herniation/hyperinflation of the left lung across the midline and displacement of the mediastinal structures into the right hemithorax. The left mainstem bronchus is compressed and stretched between the aorta and pulmonary artery.
Key takeaways
Pulmonary agenesis is a rare congenital anomaly characterized by the complete absence of lung parenchyma, bronchi, and pulmonary vasculature. While it can cause airway compression and symptoms mimicking post-pneumonectomy syndrome in adults due to mediastinal rotation and stretching, many patients remain asymptomatic and are diagnosed incidentally, having developed compensatory hyperplastic growth of the single lung.
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