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Related Experiment Videos

Obliterative bronchiolitis: varying presentations and clinicopathological correlation.

K D Markopoulo1, C D Cool, T L Elliot

  • 1Dept of Pathology, University of Colorado Health Sciences Center, Denver, USA.

The European Respiratory Journal
|February 15, 2002
PubMed
Summary

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Obliterative bronchiolitis involves inflammation and fibrosis narrowing airways. This study found inflammation, not fibrosis, correlates with lung function changes, suggesting distinct disease stages.

Area of Science:

  • Pulmonary Medicine
  • Pathology
  • Radiology

Background:

  • Obliterative bronchiolitis is characterized by inflammation and fibrosis causing airway narrowing.
  • Understanding the relationship between structural changes and lung physiology is crucial.

Purpose of the Study:

  • To correlate bronchiolar structural alterations (inflammation, fibrosis) with clinical presentation and lung function in obliterative bronchiolitis.

Main Methods:

  • Pathological examination of bronchioles in 19 patients with obliterative bronchiolitis.
  • Correlation analysis of inflammatory and fibrotic features with lung function tests (spirometry, lung volumes).
  • High-resolution computed tomography (HRCT) imaging in 10 patients.

Main Results:

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  • Mild-to-moderate bronchiolar inflammation was present in all patients.
  • Adventitial bronchiolar inflammation correlated with forced expiratory volume in one second and forced vital capacity.
  • Subepithelial fibrosis showed an inverse correlation with inflammation; no correlation between fibrosis and airflow limitation was observed.
  • HRCT revealed air trapping, ground glass opacities, and bronchial wall thickening.

Conclusions:

  • Inflammation and fibrosis may represent distinct temporal phases or non-transitioning pathologies in obliterative bronchiolitis.
  • Bronchiolar inflammation, particularly adventitial, appears more directly linked to physiological impairment than fibrosis.