Polyarticular arthritis

Differential Diagnosis

• Infectious
  • Viral
    • Parvovirus
    • Rubella
    • Hepatitis B & C
    • HIV
    • Chikungunya and related viruses
  • Bacterial
    • Lyme disease
    • Disseminated gonococcal infection
    • Subacute bacterial endocarditis
• Inflammatory
  • Seropositive arthritis
    • Rheumatoid arthritis
    • Lupus
    • Sjögren syndrome
  • Seronegative arthritis
    • Psoriatic arthritis
    • Enteropathic arthritis (type 2)
    • Reactive arthritis
  • Vasculitis
    • Polymyalgia rheumatica
  • Sarcoidosis
  • Still disease
• Others
  • Crystal arthropathy
  • Degenerative: asteoarthritis
  • Neuropsychiatric: fibromyalgia
  • Infiltrative: hemochromatosis
  • Malignancy: hypertrophic osteoarthropathy, bony metastases