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Updated: Jul 18, 2025
06:15
Author Spotlight: Investigating the Key Factors of Obliterative Bronchiolitis After Lung Transplantation
Published on: November 10, 2023
925
Environmental and occupational bronchiolitis obliterans: new reality
Sergey S Gutor1, Robert F Miller1, Timothy S Blackwell2
1Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.
Ebiomedicine
|August 20, 2023
Summary
Environmental/occupational bronchiolitis obliterans (BO) often presents subtly with exertional dyspnea. Modern cases show small airway remodeling and inflammation, requiring consideration in patients with toxin exposure history.
Area of Science:
- Pulmonary Medicine
- Environmental Health
- Occupational Medicine
Background:
- Environmental/occupational bronchiolitis obliterans (BO) is increasingly diagnosed in patients with indolent respiratory symptoms.
- Typical presentations lack a history of acute, high-level airborne toxin exposure.
- Exertional dyspnea is a common symptom, often with non-diagnostic initial evaluations.
Purpose of the Study:
- To characterize the clinical, pathological, and radiological features of contemporary environmental/occupational BO.
- To highlight diagnostic considerations for this condition.
Main Methods:
- Review of patient cases diagnosed with environmental/occupational BO over the past two decades.
- Analysis of clinical presentations, lung biopsy findings, and radiographic evaluations.
Main Results:
- Modern BO cases frequently exhibit constrictive bronchiolitis phenotype with small airway remodeling and lymphocytic inflammation.
- Associated findings include hypertensive intrapulmonary vasculature remodeling, alveolar fibroelastosis, and pleural thickening.
- Lung biopsies reveal abnormalities across distal lung compartments.
Conclusions:
- Environmental/occupational BO diagnosis should be considered in patients with subacute exertional dyspnea and history of prolonged/recurrent environmental toxin exposure.
- Future research should focus on less invasive diagnostics and novel therapeutic/preventive agents.
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