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Association between preexisting lung involvements and the risk of diffuse alveolar hemorrhage in patients with

Takashi Kida1, Tadashi Tanaka2, Isao Yokota3

  • 1Department of Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Modern Rheumatology
|April 2, 2019
PubMed

Insights

Microscopic polyangiitis (MPA) patients with existing airway disease face a higher risk of developing diffuse alveolar hemorrhage (DAH). Preexisting airway disease is a key predictor for DAH development in MPA patients.

Area of Science:

  • Rheumatology
  • Pulmonology
  • Radiology

Background:

  • Microscopic polyangiitis (MPA) is a systemic vasculitis that can affect the lungs.
  • Diffuse alveolar hemorrhage (DAH) is a severe complication of MPA.
  • The role of pre-existing lung conditions in DAH development in MPA is not fully understood.

Purpose of the Study:

  • To investigate the association between pre-existing interstitial lung disease (ILD) and airway disease and the risk of developing DAH in MPA patients.
  • To identify predictive factors for DAH in MPA.

Main Methods:

  • Retrospective cohort study of 113 MPA patients with myeloperoxidase-antineutrophil cytoplasmic antibody positivity.
  • Chest CT scans were analyzed for ILD and airway disease before treatment initiation.
  • Logistic regression models were used to assess the association between lung involvements and DAH development.

Main Results:

  • 27% of patients developed DAH during follow-up.
  • Pre-existing airway disease was independently associated with a significantly increased risk of DAH (aOR 6.86).
  • Pre-existing interstitial lung disease (ILD) was not associated with DAH development.

Conclusions:

  • DAH in MPA frequently occurs in patients with pre-existing airway disease.
  • Identifying airway disease in MPA patients may aid in predicting DAH risk.
  • Further research into the mechanisms linking airway disease and DAH in MPA is warranted.
Keywords:
Anti-neutrophil cytoplasmic antibody-associated vasculitisMPO-ANCAairway diseasebronchiectasisbronchiolitis

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