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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease

Published on: June 16, 2020

Pulmonary interstitial fibrosis as a presenting manifestation in perinuclear antineutrophilic cytoplasmic antibody

Gregg M Eschun1, Steven N Mink, Sat Sharma

  • 1University of Manitoba, Winnipeg, Manitoba, Canada.

Chest
|January 16, 2003
PubMed

Insights

Pulmonary interstitial fibrosis (PIF) may be an unrecognized manifestation of microscopic polyangiitis (MPA). This study found PIF in all MPA patients, often years before diagnosis, suggesting a link between these conditions.

Area of Science:

  • Rheumatology
  • Pulmonology
  • Nephrology

Background:

  • Microscopic polyangiitis (MPA) is a small vessel vasculitis often associated with pulmonary and renal syndromes.
  • The association between MPA and pulmonary interstitial fibrosis (PIF) is not well-established.
  • MPA is characterized by necrotizing vasculitis with minimal immune deposits, primarily affecting small vessels.

Observation:

  • This study reports six cases of MPA with radiographic evidence of PIF preceding treatment.
  • All patients had biopsy-confirmed renal disease consistent with MPA and positive antineutrophilic cytoplasmic antibody titers.
  • Hemoptysis was present in about half of the cases.

Findings:

  • Pulmonary interstitial fibrosis (PIF) was detected via CT scan in all six MPA patients.
  • PIF was often evident years before the MPA diagnosis.
  • The findings suggest PIF can be a pulmonary manifestation of MPA.

Implications:

  • Recognizing PIF as a potential manifestation of MPA may improve diagnostic timelines.
  • Further research into the incidence and mechanisms of PIF in MPA is warranted.
  • This association could enhance understanding of MPA's pulmonary involvement and lead to earlier interventions.

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