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Systemic vasculitis in patients with hepatitis C.

P Cacoub1, T Maisonobe, V Thibault

  • 1Department of Internal Medicine, H pital La Pitié-Salpêtrière, Paris, France. patrice.cacoub@psl.ap-hop-paris.fr

The Journal of Rheumatology
|February 24, 2001
PubMed
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Hepatitis C virus (HCV) infection can cause different types of vasculitis, including polyarteritis nodosa (PAN) and mixed cryoglobulinemia (MC). Distinguishing between PAN-type and MC-type vasculitis is crucial for effective treatment strategies in HCV patients.

Area of Science:

  • Hepatology
  • Rheumatology
  • Immunology

Background:

  • Hepatitis C virus (HCV) infection is a known cause of systemic vasculitis.
  • Two distinct patterns of vasculitis associated with HCV include polyarteritis nodosa (PAN) and mixed cryoglobulinemia (MC).

Purpose of the Study:

  • To analyze the distinct clinical and pathological characteristics of patients with HCV-associated systemic vasculitis.
  • To compare patients with PAN-type vasculitis versus MC-type vasculitis in the context of HCV infection.

Main Methods:

  • Retrospective comparison of two groups of HCV patients with systemic vasculitis.
  • Group 1: 10 patients with biopsy-proven PAN-type vasculitis.
  • Group 2: 7 patients with MC syndrome.

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Main Results:

  • PAN-type vasculitis presented with life-threatening systemic involvement, severe neuropathies, malignant hypertension, and elevated inflammatory markers.
  • MC-type vasculitis showed distinct features, including moderate sensory polyneuropathies and specific inflammatory cell infiltrates.
  • Complete recovery was achieved in most PAN-type patients with combined therapy, while interferon-alpha was ineffective for peripheral neuropathy in MC-type patients.

Conclusions:

  • HCV infection is associated with diverse systemic vasculitis syndromes, notably PAN and MC.
  • Significant differences in clinical presentation, pathology, and therapeutic response necessitate differentiating PAN-type from MC-type vasculitis in HCV patients.