CTICasesRelapsing Polychondritis
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Imaging findings
CT reveals diffuse thickening and calcification of the trachea, with characteristic sparing of the posterior membrane. Focal bronchial narrowing is evident in the left main bronchus, the origins of the left upper lobe and lingular bronchi, and the right middle lobe bronchus. Expiratory images demonstrate diffuse confluent air trapping in the left upper lobe (extending to the lingula) and right middle lobe.
Key takeaways
Relapsing polychondritis typically presents with diffuse tracheal and bronchial wall thickening, often with sparing of the posterior membrane, though with acute inflammation, circumferential thickening can occur. Calcification is a later feature. The condition leads to airway narrowing, tracheomalacia, and consequent air trapping. A history of facial pain (e.g., around sinuses) is a common associated symptom.
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