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Development of Obliterative Bronchiolitis in a Murine Model of Orthotopic Lung Transplantation
10:01

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Published on: July 10, 2012

Obliterative (constrictive) bronchiolitis.

Joseph P Lynch1, S Samuel Weigt, Ariss DerHovanessian

  • 1Division of Pulmonary, Critical Care Medicine, Clinical Immunology, and Allergy, Department of Internal Medicine, The David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA. jplynch@mednet.ucla.edu

Seminars in Respiratory and Critical Care Medicine
|September 25, 2012
PubMed
Summary
This summary is machine-generated.

Obliterative bronchiolitis (OB) is a rare lung disorder causing progressive airflow obstruction. This review covers its clinical, radiographic, and histological features, along with management strategies for this serious condition.

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Area of Science:

  • Pulmonology
  • Pathology
  • Transplant Medicine

Background:

  • Obliterative bronchiolitis (OB), also known as constrictive bronchiolitis, is a rare, progressive fibrotic disorder affecting the small airways.
  • It is characterized by airflow obstruction, distinct imaging findings, poor treatment response, and high mortality.
  • OB frequently arises in lung or hematopoietic stem cell transplant recipients due to graft-versus-host disease or chronic rejection.

Purpose of the Study:

  • To review the key clinical, radiographic, and histological features of obliterative bronchiolitis.
  • To outline current management approaches for patients with OB.
  • To discuss various etiologies, including post-transplant complications, connective tissue diseases, infections, and environmental exposures.

Main Methods:

  • Literature review of clinical studies, case reports, and reviews on obliterative bronchiolitis.
  • Analysis of diagnostic criteria, including imaging (chest X-ray, HRCT) and histopathology.
  • Synthesis of information on risk factors, pathogenesis, and treatment outcomes.

Main Results:

  • OB presents with progressive airflow limitation, typically without parenchymal infiltrates but with a mosaic perfusion pattern on CT scans.
  • Common causes include lung and stem cell transplantation, connective tissue diseases, infections, and toxic exposures.
  • Cryptogenic obliterative bronchiolitis refers to cases where no specific cause is identified.

Conclusions:

  • Obliterative bronchiolitis is a severe fibrotic airway disease with significant morbidity and mortality, especially post-transplantation.
  • Early recognition based on clinical, radiographic, and histological findings is crucial for management.
  • Further research into pathogenesis and targeted therapies is needed to improve outcomes for this challenging condition.