Cutaneous small vessel vasculitis

• Small vessel vasculitides with cutaneous involvement
• Most cases are idiopathic
• Types
  • Immune complex mediated vasculitides
    • Cryoglobulinaemic vasculitis
    • IgA vasculitis = Henoch Schönlein purpura
    • Urticarial vasculitis
  • ANCA-associated vasculitides
    • Granulomatosis with polyangiitis
    • Eosinophilic granulomatosis with polyangiitis
• Common clinical features
  • Palpable purpuras
  • Erythematous papules
  • Urticaria
  • Systemic symptoms
    • Fever
    • Myalgia
    • Arthralgia
    • Renal disease
• Prognosis
  • 90% spontaneously resolve within months
  • 10% become chronic or recurrent