CTICasesTracheobronchial Diverticula in Asthma
Imaging findings
CT in a young woman with asthma obtained for trauma evaluation demonstrates multiple tiny outpouchings along the posterior membranous trachea and proximal bronchi in addition to the commonly seen single right paratracheal diverticulum, representing multiple bronchial and tracheal diverticula.
Key takeaways
Tracheobronchial diverticula are air-filled outpouchings from the tracheal or bronchial wall that most commonly arise at the right posterolateral tracheal wall just above the carina, likely from the ostia of submucosal glands. Multiple or diffuse tracheal diverticula have been reported in chronic obstructive airway diseases including COPD and cystic fibrosis, and may also occur in asthma, possibly related to repeated elevated intraluminal pressures from coughing or air trapping.
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