What is the role of lab studies in the workup of pes anserine bursitis?

Updated: May 22, 2020
  • Author: P Mark Glencross, MD, MPH, FACOEM, FAAPMR; Chief Editor: Milton J Klein, DO, MBA  more...
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Infections of the pes anserine bursa are very rare and occur primarily in immunocompromised patients. These patients typically have a localized area of warmth, pain, and swelling. In such cases, a standard laboratory workup for infection is indicated, including determination of the erythrocyte sedimentation rate (ESR), a complete blood count (CBC) with differential, and measurement of the C-reactive protein (CRP) level.

If the bursa or joint is aspirated for this or other reasons, analysis of the fluid may include a cell count, assessment of fluid appearance, Gram staining, culture, and polarized light microscopy.

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