CTICasesExcessive Dynamic Airway Collapse (EDAC)
Imaging findings
Normal trachea on inspiration, but significant collapse of the central airways during forced expiration, with intact cartilage.
Key takeaways
EDAC is distinguished from tracheomalacia by weakness of the posterior membrane rather than the cartilage itself. It can be assessed via expiratory imaging and potentially treated with tracheoplasty/stent trials.
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