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Acute pes anserine bursitis: MR imaging

J R Forbes1, C A Helms, D L Janzen

  • 1Department of Radiology, School of Medicine, University of California San Francisco 94143.

Radiology
|February 1, 1995
PubMed
Summary

Magnetic resonance (MR) imaging reveals fluid in the pes anserine bursa, characteristic of acute pes anserine bursitis. This imaging technique helps differentiate it from internal knee derangements, potentially avoiding unnecessary surgery.

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Area of Science:

  • Radiology
  • Orthopedic Imaging
  • Musculoskeletal System

Background:

  • Pes anserine bursitis is an inflammation of the bursa located on the medial side of the knee.
  • It can present with symptoms that mimic internal derangements of the knee, leading to diagnostic challenges.

Observation:

  • Magnetic resonance (MR) imaging was performed on four patients with suspected knee internal derangements.
  • Fluid collections within the pes anserine bursa were identified as the primary MR finding.

Findings:

  • Correlation of MR imaging findings with physical examination confirmed acute pes anserine bursitis in all patients.
  • The characteristic MR appearance includes fluid beneath the pes anserinus tendons on the medial tibia near the joint line.

Implications:

  • MR imaging provides a definitive diagnosis of pes anserine bursitis, distinguishing it from internal knee derangements.
  • Accurate MR diagnosis can prevent unnecessary arthroscopic procedures for pes anserine bursitis.
  • This imaging modality is crucial for appropriate patient management and avoiding surgical intervention.

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