Differential diagnosis

  • Septic arthritis
  • Gout
  • Pseudogout
  • Haemarthrosis
  • Osteoarthritis
  • Trauma
  • Seronegative arthritis
    • Reactive arthritis
    • Gonococcal arthritis
    • Psoriatic arthritis
    • IBD
    • Ankylosing spondylitis
  • Iatrogenic: previous intra-arterial joint injection