Incidental finding of bronchial diverticula in a non-smoker population: evaluation on thin-section CT

  • Federica Ciccarese | ciccarese.f@gmail.com S.Orsola-Malpighi University Hospital, Italy.
  • Giorgio Garzillo S.Orsola-Malpighi University Hospital, Italy.
  • Anna Maria Chiesa S.Orsola-Malpighi University Hospital, Italy.
  • Antonio Poerio S.Orsola-Malpighi University Hospital, Italy.
  • Serena Baroncini S.Orsola-Malpighi University Hospital, Italy.
  • Maria Letizia Bacchi Reggiano S.Orsola-Malpighi University Hospital, Italy.
  • Nicola Sverzellati Ospedale Maggiore of Parma, Italy.
  • Maurizio Zompatori S.Orsola-Malpighi University Hospital, Italy.

Abstract

Bronchial diverticula have been described as a common radiological finding in smoker patients with COPD, but the specificity of this sign should be further investigated. Thus, the aim of our study was to evaluate the prevalence of diverticula in a cohort of non-smoker subjects. Between February and July 2012, 2438 patients were admitted to our Radiology Unit to undergo a chest CT. Among them, we enrolled 121 non-smoking patients (78/121-64.5% females, 43/121-35.5% males), of different age (57.0±20.7 years-range: 12-88), without any respiratory symptoms, submitted to chest CT for several reasons (oncologic evaluation: 59/121-48.8%; follow up of lung nodules: 27/121-22.3%; screening in connectivitis: 12/121-9.9%; others: 23/121-19.0%). We considered thin-section CT scan on axial, coronal and sagittal plans to evaluate prevalence, numbers and level of bronchial diverticula. Diverticula were found in 41/121-33.9% patients, with a slight major prevalence in males (p=0.048), but no significant difference on age. In 31/41-75.6% the number was <3, whereof 17/31-54.8% with just one diverticulum assessed. Regarding the level, in 30/41-73.2% they were subcarinal, but they were also detected in mainstem (2/41-4.9%) and lobar bronchi (with the right upper lobe bronchus most frequently involved- 12/41-29.3%). Bronchial diverticula can be observed in non-smokers, as well as in smoker patients with COPD. However, their prevalence seems to be lower than in smokers and they tend to be isolated and subcarinal. The age of patients does not influence their finding. More studies should be proposed to better define a cut-off between smokers and healthy subjects.

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Published
2016-06-22
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Section
Pneumology - Original Articles
Keywords:
Airway remodeling, bronchial diverticula, multidetector computed tomography, incidental findings.
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How to Cite
Ciccarese, F., Garzillo, G., Chiesa, A. M., Poerio, A., Baroncini, S., Bacchi Reggiano, M. L., Sverzellati, N., & Zompatori, M. (2016). Incidental finding of bronchial diverticula in a non-smoker population: evaluation on thin-section CT. Monaldi Archives for Chest Disease, 81(1-2). https://doi.org/10.4081/monaldi.2015.743