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Classical polyarteritis nodosa and microscopic polyangiitis--a clinicopathologic study.

R Handa1, J P Wali, S D Gupta

  • 1Department of Medicine, All India Institute of Medical Sciences, New Delhi.

The Journal of the Association of Physicians of India
|April 9, 2001
PubMed
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Polyarteritis nodosa (PAN) and microscopic polyangiitis (MPA) present with diverse symptoms. Corticosteroids and cyclophosphamide offer a good prognosis for both vasculitis conditions.

Area of Science:

  • Rheumatology
  • Internal Medicine
  • Pathology

Background:

  • Polyarteritis nodosa (PAN) and microscopic polyangiitis (MPA) are distinct forms of systemic vasculitis.
  • Understanding their varied clinical presentations and outcomes is crucial for effective management.

Purpose of the Study:

  • To delineate the clinical spectrum, laboratory findings, histopathology, and treatment outcomes of classical PAN and MPA.
  • To compare the characteristics and prognoses of patients with PAN and MPA.

Main Methods:

  • Retrospective analysis of patients diagnosed with PAN and MPA at a North Indian teaching hospital from 1994-1999.
  • Review of clinical data, laboratory results, urinalysis, serological markers (HBsAg, ANCA), and histopathological findings.

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Main Results:

  • Five patients with PAN (two systemic, three limited) and six with MPA were identified.
  • Constitutional symptoms, musculoskeletal complaints, neuropathy, and skin lesions were common in PAN.
  • MPA patients frequently presented with pulmonary-renal syndrome; 83.3% were pANCA positive and had active urinary sediment.
  • Rarely observed: antiphospholipid syndrome and interstitial lung disease in MPA; spontaneous recovery in one systemic PAN case.
  • Treatment outcomes were more favorable in PAN compared to MPA.

Conclusions:

  • PAN and MPA exhibit a broad and varied clinical spectrum.
  • Effective treatment with corticosteroids and cyclophosphamide can lead to favorable outcomes in both conditions.