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A. Monoarthritis Differential

  1. Acute Monoarthritis
    CommonLess Common
    Bacterial arthritisLeukemia
    Gout or CPPD DiseaseRheumatoid arthritis
    SpondyloarthropathiesSarcoid arthritis
    Reiter syndromeHemarthrosis
    Psoriatic arthritisCoagulopathy
    Inflammatory bowel diseaseDialysis Arthropathy
    Hemarthrosis w/ TraumaOsteochondromatosis
    Juvenile RAPigmented Vilonodular Synovitis (PVNS)
    Anticoagulant therapyPancreatic Panniculitis
  2. Chronic Monoarthritis
    CommonLess Common
    OsteoarthritisFungal arthritis
    SpondyloarthropathiesTuberculous arthritis
    Lyme disease (recurring)Bacterial arthritis
    Avascular NecrosisMonarticular RA
    Pseudogout (CPPD)Sarcoid arthritis
    PVNSOsteochondromatosis
    Fracture Associated Effusion

B. Polyarthritis Differential

  1. Acute Polyarthritis
    CommonLess Common
    Migratory
    Neisseria infectionViral (Hep B, rubella, EBV, parvo B 19)
    Acute rheumatic fever
    Lyme disease (early)
    Nonmigratory
    Rheumatoid arthritisHematologic disorders
    Serum sicknessPolyarticular gout
    Systemic lupus
    Polyarticular JRA
  2. Chronic Polyarthritis
    1. Rheumatoid arthritis
    2. Polyarticular JRA
    3. Polyarticular gout
    4. Osteoarthritis
    5. Sarcoid arthritis
    6. Overlap syndromes
    7. Spondyloarthropathy
  3. Periarthritis Component
    1. Gout
    2. Pseudogout (CPPD)
    3. SLE
    4. Palindromic Rheumatism
    5. Sarcoid Arthritis
    6. Calcific Tendinitis
  4. Polyarthritis and Fever [1]
    1. Septic Arthritis (including gonococcal)
    2. Connective tissue and other autoimmune diseases
    3. Viral arthropathy
    4. Reactive arthropathy
    5. Lyme disease
    6. Sickle cell anemia
    7. Infective endocarditis
    8. Leukemia or lymphoma
    9. Gout
    10. Pseudogout
    11. Acute Rheumatic Fever

C. Cross References

References

  1. Carapetis JR, McDonald M, Wilson NJ. 2005. Lancet. 366(9480):155 abstract