Monoarthritis (differential)

Monoarthritidies have a relatively short differential diagnosis, including:

Common

• septic arthritis
• osteoarthritis (post-traumatic)
• gout
• Charcot joint  (neuropathic joint)
• pigmented villonodular synovitis (PVNS)
• synovial osteochondromatosis

Less common

• hemophilia
• tuberculosis
• fungal
• chondrolysis (post-traumatic)

Related Radiopaedia articles

Arthritides

• autoimmune
  • seronegative spondyloarthritides
    • ankylosing spondylitis
      • bamboo spine
      • dagger sign
      • hatchet sign
      • shiny corner sign
    • enteropathic arthritis
    • psoriatic arthritis
      • arthritis mutilans
      • ivory phalanx
      • pencil-in-cup deformity
    • reactive arthritis (Reiter syndrome)
    • undifferentiated spondyloarthritis
    • signs
      • Andersson lesion
      • Romanus lesion
      • vertebral body squaring
  • juvenile idiopathic arthritis
  • lyme arthritis
  • rheumatoid arthritis
    • musculoskeletal manifestations of rheumatoid arthritis
      • Boutonniere deformity
      • hitchhiker thumb deformity
      • Z deformity
      • rheumatoid nodule
    • pulmonary manifestations
      • rheumatoid pulmonary nodule
  • robust rheumatoid arthritis
  • systemic lupus erythematosus
    • Jaccoud arthropathy
• degenerative
  • osteoarthritis (mnemonic)
    • post-traumatic osteoarthritis
    • erosive osteoarthritis
      • gull-wing appearance
    • grading
      • Kellgren and Lawrence system
      • osteoarthritis of the hip - grading
      • osteoarthritis of the knee - grading
        • Ahlbäck classification
    • rapidly destructive osteoarthritis of the hip
    • osteoarthritis of the hand
      • Bouchard nodes
      • Heberden nodes
    • osteoarthritis of the knee
    • scaphotrapeziotrapezoidal (STT) arthritis
    • osteoarthritis of the vertebral column
    • osteoarthritis of the TMJ
  • primary cystic arthrosis of the hip
  • secondary synovial osteochondromatosis
• depositional
  • amyloid arthropathy
  • crystal arthropathy
    • calcium pyrophosphate dihydrate deposition disease (CPPD)
    • gout
    • ​​hydroxyapatite crystal deposition disease (HADD)
      • Milwaukee shoulder
  • haemophilic arthropathy
    • Arnold-Hilgartner classification
• infectious
  • septic arthritis
  • tuberculous arthropathy
    • Phemister triad
    • shoulder tuberculous arthropathy
• miscellaneous disorders
  • avascular necrosis
  • osteochondral defects
  • primary synovial osteochondromatosis
• related articles 
  • erosive arthritis (differential) 
  • joint ankylosis (differential)
  • monoarticular arthropathy
  • polyarticular arthropathy
  • monoarthritis (differential)