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Orphanet classification of rare systemic and rheumatological diseases

Rare systemic or rheumatologic disease ORPHA:98023
- Vasculitis ORPHA:52759
  - Predominantly small-vessel vasculitis ORPHA:156146
    - Immune complex mediated vasculitis ORPHA:156149
      - Cryoglobulinemic vasculitis ORPHA:91138
      - Cutaneous small vessel vasculitis ORPHA:889
      - Erythema elevatum diutinum ORPHA:90000
      - Hypocomplementemic urticarial vasculitis ORPHA:36412
      - Immunoglobulin A vasculitis ORPHA:761

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