A bronchial diverticulum refers to an blind ended outpouching arising from the bronchial tree.
They can be relatively common on CT studies. They can be more common and more widespread in smokers 2 but can also present in non smokers. There may be slightly increase 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.
There exact aetiology 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