A bronchial diverticulum refers to a blind-ended outpouching arising from the bronchial tree.
They are relatively common on CT studies. They are more common and more widespread in smokers 2 but can also present in non-smokers. There may be a slightly increased male predilection but no significant age predilection 3.
They can be of variable shape and size although most tend to be around 1-2 mm in size 3.
Their exact etiology is variable but chronic inflammatory tracheobronchial changes and increased endoluminal pressure may play a role in their development 4.
- 1. Higuchi T, Takahashi N, Shiotani M et-al. Main bronchial diverticula in the subcarinal region: their relation to airflow limitations. Acta Radiol. 2012;53 (1): 44-8. doi:10.1258/ar.2011.110222 - Pubmed citation
- 2. Sverzellati N, Ingegnoli A, Calabrò E et-al. Bronchial diverticula in smokers on thin-section CT. Eur Radiol. 2010;20 (1): 88-94. doi:10.1007/s00330-009-1515-2 - Pubmed citation
- 3. Miyara T, Oshiro Y, Yamashiro T et-al. Bronchial diverticula detected by multidetector-row computed tomography: incidence and clinical features. J Thorac Imaging. 2011;26 (3): 204-8. doi:10.1097/RTI.0b013e3181ebedc4 - Pubmed citation
- 4. Polverosi R, Carloni A, Poletti V. Tracheal and main bronchial diverticula: the role of CT. Radiol Med. 2008;113 (2): 181-9. doi:10.1007/s11547-008-0249-6 - Pubmed citation
- 5. Ciccarese F, Garzillo G, Chiesa AM, Poerio A, Baroncini S, Bacchi Reggiano ML, Sverzellati N, Zompatori M. Incidental finding of bronchial diverticula in a non-smoker population: evaluation on thin-section CT. Monaldi archives for chest disease = Archivio Monaldi per le malattie del torace. 81 (1-2): 743. doi:10.4081/monaldi.2015.743 - Pubmed