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[Allergic granulomatous angiitis]

L Yu1, N Zhao, Y J Zhu

  • 1Department of Internal Medicine, Peking Union Medical College Hospital.

Zhonghua Nei Ke Za Zhi
|October 1, 1993
PubMed
Summary
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Allergic granulomatous angiitis (AGA) is a rare condition presenting with respiratory issues, eosinophilia, and organ involvement. Early diagnosis and treatment with prednisone, often with CTX, effectively alleviate symptoms and reduce eosinophil counts.

Area of Science:

  • Rheumatology
  • Pulmonology
  • Pathology

Background:

  • Allergic granulomatous angiitis (AGA), also known as eosinophilic granulomatosis with polyangiitis, is a rare systemic vasculitis.
  • It is characterized by a three-stage clinical course involving respiratory symptoms, eosinophilia, and multi-organ involvement.

Observation:

  • Four male patients aged 36-54 with AGA were diagnosed between 1988 and 1990.
  • Clinical presentations included asthma history, hepatomegaly, proteinuria, heart block, neuromuscular and cutaneous involvement, and marked eosinophilia (1254–8104/mm³).

Findings:

  • Histopathological examination revealed panangiitis with eosinophilic infiltration and granuloma formation.
  • All patients responded positively to prednisone therapy, with or without cyclophosphamide (CTX).

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Implications:

  • Treatment with prednisone and CTX led to a significant reduction in absolute eosinophil counts (<1000/mm³) and symptom improvement.
  • This case series highlights the importance of recognizing AGA and its responsiveness to immunosuppressive therapy.