Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Eiman Ghaffarpasand, M.D. [2]
Diseases | Clinical manifestations | Para-clinical findings | Gold standard | Additional findings | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Symptoms | Physical examination | ||||||||||||||||||
Lab Findings | Imaging | Histopathology | |||||||||||||||||
Joint Swelling | Fever | Weight loss | Claudication | Morning stiffness | Local erythema | Skin manifestation | CBC | ESR | Synovial fluid | Other | X-ray | CT scan | Other | ||||||
Monoarthritis | Osteoarthritis[1] | + | - | - | - | - | - | Heberden nodes | Anemia | - | Noninflammatory joint fluid | Urinary pyridinium cross-links | Joint-space loss, Subchondral bony sclerosis, Cyst formation | Malalignment of the patellofemoral joint | Early diagnosis of osteoarthritis of the hand with bone scan | - | Clinical findings | Microfracture, Bone pain | |
Trauma[2] | + | - | - | - | - | + | Wound or laceration | - | - | Hemarthrosis | - | Severe joint effusion, Fracture | Fracture, Synovial tear | - | - | X-ray | Deformity, Severe pain | ||
Neoplasms[3] | + | - | + | +/- | - | - | Rash | Normocytic normochromic anemia | ↑ | High WBC count (10,000-40,000/µL) | Hypercalcemia, Hyperphosphatemia | Peri-articular osteoblastic or osteoclastic lesion | Elevation of the periosteum | Intense radionuclide uptake in bone scan | Spindle-shaped and atypical stromal cells, with irregular nuclei | Clinical findings and imaging | Nocturnal pain, Pathologic fractures | ||
Infection | Gonococcal infection[4] | + | + | - | - | - | + | Maculopapular, Pustular, Vesicular lesions on an erythematous base | Leukocytosis | ↑ | Purulent with cell count > 50,000 WBC/µL (with PMNs > 90%) | Blood and synovial fluid culture | Minor articular damage | - | - | Dermal vasculitis with perivascular neutrophils | Nucleic acid amplification tests (NAATs) | Dermatitis, Tenosynovitis | |
Nongonococcal bacterial infections[5] | + | + | - | - | - | + | Local erythema | Leukocytosis | ↑ | Purulent with cell count > 50,000 WBC/µL (with PMNs > 90%) | Blood and synovial fluid culture | Joint effusion, Cartilage destruction, Joint space narrowing | Sternoclavicular or sacroiliac joint infections | Periarticular osteomyelitis in MRI | - | Synovial fluid culture | Limping, Malaise | ||
Lyme disease[6] | + | + | +/- | +/- | - | - | Erythema migrans | Leukopenia, Thrombocytopenia | - | Cell counts 500-98,000/µL | Microscopic hematuria, Proteinuria, ↑ALT or AST | Knee joint effusion. Intra-articular edema | - | Unspecific effusion, Synovial thickening or enhancement in MRI | Fibrosis of the deeper dermis and hyalinization of collagen bundles | Serologic tests | Erythema migrans | ||
Crystal-induced arthritis | Gout[7] | + | +/- | - | - | - | + | Local swelling and erythema | Leukocytosis | ↑ | Needle shaped urate crystals, WBC count > 2000/µL | Urinary uric acid (>1100 mg in 24h) | Punched-out erosions or lyticareas with overhanging edges | Complementary for recognizing erosions | Tophi or edema in MRI | Large pale pink acellular areas (urate crystals), surrounded by histiocytes and multinucleated giant cells | Synovial fluid microscopy | Conjunctival nodules | |
Pseudo-gout[8] | + | - | - | - | - | +/- | Local swelling and erythema | Leukocytosis | ↑ | Rod shaped CPPD crystals, WBC count > 2000/µL | Hypercalcemia, Hypercalciuria | Radiodense lines paralleling the articular surface and calcification (chondrocalcinosis) | Calcific mass with a lobulated configuration in the ligamentum flavum or the joint capsule | Synovitis and calcific deposits in ultrasonography | Synovial calcium pyrophosphate crystals | Synovial fluid microscopy | Tenderness | ||
Systemic disorders | Reactive arthritis[9] | +/- | +/- | - | - | - | - | Genital ulceration | Normocytic normochromic anemia | ↑ | High WBC count (10,000-40,000/µL) | HLA-B27 test | Periosteal reaction and proliferation of tendon insertion site | Sacroiliitis | Enthesitis in ultrasonography | Keratoderma blennorrhagicum,Balanitis circinata | Spondyloarthritis and unequivocal demonstration of preceding infection | Conjunctivitis, Uveitis | |
Psoriatic arthritis[10] | + | - | - | - | - | + | Scaly erythematous plaques,
Guttate lesions, Lakes of pus, |
Normal | ↑ | High WBC count (5000-15,000/µL) with >50% of PMN leukocytes | ↑RF, ANA, IgA | Joint-space narrowing, Fluffy periostitis | Pencil-in-cup deformity, Early signs of synovitis | Sacroiliitic synovitis, Enthesitis in MRI | Lack of intrasynovial Ig and RF, Greater propensity for fibrous ankylosis, osseous resorption, and heterotopic bone formation | Clinical findings | Onycholysis, Splinter hemorrhages | ||
Inflammatory bowel disease-associated arthritis[11] | + | + | - | - | + | +/- | Pyoderma gangrenosum(ulcerative colitis),Erythema nodosum(Crohn disease) | Iron deficiency anemia, Leukocytosis, Thrombocytosis | ↑ | Mild to moderate inflammatory fluid, PMNpredominance | ↑RF, Antiendomysial Ab,Antitransglutaminase Ab | Bilateral sacroiliitis, Syndesmophytes and apophyseal joint involvement in spine | - | Early detection of spinal and sacroiliac lesions in MRI | - | Clinical findings and history | Acute anterior uveitis | ||
Sarcoid periarthritis[12] | + | - | - | - | - | - | Mild papules and nodules | Mild anemia | ↑ | Cell count < 25% PMNs (non-inflammatory) | IL-2 and IFN-γ, ↑ACE, ↑1, 25-dihydroxyvitamin D | Bilateral hilar adenopathy | Active alveolitis or fibrosis | Hepatosplenomegaly in ultrasonography | Noncaseating granulomas (NCGs) | Histological confirmation | Heart block, Ocular lesion | ||
Rheumatoid arthritis[13] | + | - | + | + | + | - | Rheumatoid nodules | Anemia, Thrombocytosis | ↑ | WBC count >2000/µL (generally 5000-50,000/µL), with neutrophilpredominance (60-80%) | Anti-CCP Ab, Hyperuricemia | Joint-space narrowing | Microfractures | Synovitis in MRI | Influx of inflammatory cells into the synovial membrane, withangiogenesis | Clinical findings coupled anti-CCP antibody | Rheumatoid nodules | ||
Myelodysplastic and leukemic disorders[14] | + | + | + | +/- | - | - | Petechia and purpura | Anemia, | ↑ | WBC count >2000/µL (inflammatory), with neutrophilpredominance | LDH, Uric acid | Articular surface erosion, Synovial effusion | Thickened synovium | Synovitis in MRI | Inflammatory cells infiltration in synovial tissue | Bone marrow biopsy | Fatigue, Nausea, Recurrent infections |