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Updated: May 17, 2026

Catheter-based Endovascular Angioplasty for Fibrosing Mediastinitis-associated Pulmonary Vein Stenosis
Published on: August 26, 2025
Update on diffuse alveolar hemorrhage and pulmonary vasculitis
Megan L Krause1, Rodrigo Cartin-Ceba, Ulrich Specks
1Department of Internal Medicine, Mayo Clinic, 200 First Street Southwest, Rochester, MN 55905, USA.
Diffuse alveolar hemorrhage requires identifying the cause for proper treatment. Antineutrophil cytoplasmic antibody-associated vasculitis is a common cause, with rituximab showing promise in its management.
Area of Science:
- Pulmonology
- Rheumatology
- Nephrology
Background:
- Diffuse alveolar hemorrhage (DAH) presents as a syndrome with diverse etiologies.
- Identifying the specific cause of DAH is critical for guiding effective treatment strategies.
Purpose of the Study:
- To highlight the significance of diagnosing the underlying cause of DAH.
- To emphasize the role of pulmonary vasculitis, specifically antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV), as a frequent cause of DAH.
- To discuss current and emerging treatment modalities for AAV-induced DAH.
Main Methods:
- Literature review of DAH and AAV.
- Analysis of treatment protocols for AAV.
- Evaluation of the efficacy of rituximab in AAV management.
Main Results:
- Pulmonary vasculitis, particularly AAV, is a significant contributor to DAH.
- Standard AAV treatment involves induction and maintenance therapy.
- Rituximab is increasingly utilized and effective in treating AAV.
Conclusions:
- Accurate diagnosis of DAH etiology is paramount for patient outcomes.
- ANCA-associated vasculitis is a key differential diagnosis for DAH.
- Rituximab represents a valuable therapeutic option for patients with AAV-related DAH.
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