Polyarteritis nodosa

• Facts:
  Vasculitis of medium-sized arteries
• History / PE:
  Fatigue / weakness
  Fever
  
• Diagnosis:
  Perinuclear pattern of antineutrophil cytoplasmic (p-ANCA) antibodies
  Elevated ESR, C-reactive protein
• Treatment:
  Corticosteroids
• Associated With:
  Hepatitis B
  Type 3 hypersensitivity reaction
• Differential Diagnosis:
  Churg-Strauss syndrome