What is the role of lab testing in the evaluation of osteoarthritis (OA)?

Updated: Oct 12, 2020
  • Author: Carlos J Lozada, MD; Chief Editor: Herbert S Diamond, MD  more...
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Levels of acute-phase reactants are typically within the reference range in patients with osteoarthritis. The erythrocyte sedimentation rate (ESR) is not usually elevated, though it may be slightly so in cases of erosive inflammatory arthritis. The synovial fluid analysis usually shows a white blood cell (WBC) count below 2000/µL, with a mononuclear predominance.

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