CTICasesBronchus Intermedius Compression by Dilated Pulmonary Artery
Imaging findings
Radiographs show marked cardiomegaly, massive dilation of the pulmonary arteries, and progressive atelectasis and consolidation of the right lower and middle lobes. Non-contrast CT reveals severe, slit-like compression of the bronchus intermedius between the giant, aneurysmal right pulmonary artery and the spine.
Key takeaways
Massive pulmonary artery dilation in patients with long-standing pulmonary hypertension or congenital heart disease (such as a Blalock-Taussig shunt) can cause severe extrinsic airway compression. This airway narrowing, reminiscent of post-pneumonectomy syndrome, leads to recurrent mucous plugging, ventilation issues, and atelectasis.
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