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Tracheobronchomegaly is a very rare congenital disorder of the lung primarily characterized by an abnormal widening of the upper airways.[2] The abnormally widened trachea and mainstem bronchi are associated with recurrent lower respiratory tract infection and copious purulent sputum production, eventually leading to bronchiectasis and other respiratory complications.[3]
| Tracheobronchomegaly | |
|---|---|
| Other names | Mounier-Kühn syndrome[1] |
| Specialty | Pulmonology  |
| Complications | Recurrent pulmonary infections |
| Causes | atrophy of elastic fibers in the trachea and main bronchi, leading to thinning of the smooth muscle layer |
| Diagnostic method | CT Chest. Tracheobroncheal flaccidity, dilatation, and/or collapse. |
| Frequency | 300 cases have been reported to date |
Woodring et al. (1991) suggested the following diagnostic criteria for tracheomegaly in adults based on chest radiography:[4]
- Adult Males: Tracheal transverse diameter > 25 mm and sagittal diameter > 27 mm.
- Adult Females: Tracheal transverse diameter > 21 mm and sagittal diameter > 23 mm.
The term "Mounier-Kuhn syndrome" derives from the characterization of the condition by Prof. Pierre-Louis Mounier-Kuhn in 1932, while the name "tracheobronchomegaly" was introduced by Katz et al. in 1962.[5][6][7]
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