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Lab features of Osteoarthritis
What laboratory features are seen in OA?
Laboratory findings are nonspecific:
- • Erythrocyte sedimentation rate (ESR) typically within normal limits.
- • Rheumatoid factor (RF) is negative.
- • Antinuclear antibodies (ANAs) are not present.
- • Synovial fluid.
- – Normal viscosity with good string sign
- – Clear and yellow colored
- – White blood cell counts typically <1000 to 2000/mm 3
- – No crystals and negative cultures
