Pes anserinus bursitis

Diagnosis certain

A 34-year man with medial knee pain

  • Increased bursal fluid in pes anserinus with thickened wall in a patient with chronic medial knee pain
  • Pes anserinus bursitis refers to symptomatic inflammation of the pes anserinus bursa, which is located at the medial aspect of the knee, deep to the pes anserinus tendons.
  • With the correct history of pain, many clinicians will diagnose pes anserinus bursitis based on the presence of increased bursal fluid alone.

MRI

  • increased bursal fluid
  • thickened bursal wall
  • surrounding tissue oedema
  • abnormal wall / surrounding tissue enhancement
  • Pes anserine bursitis typically responds well to conservative treatment (rest, analgesia)
  • Forbes JR, Helms CA, Janzen DL. Acute pes anserine bursitis: MR imaging. Radiology. 194 (2): 525-7. doi:10.1148/radiology.194.2.7824735- Pubmed
  • Klontzas M, Akoumianakis I, Vagios I, Karantanas A. MR Imaging Findings of Medial Tibial Crest Friction. Eur J Radiol. 2013;82(11):e703-6. doi:10.1016/j.ejrad.2013.07.024- Pubmed
  •  Curtis B, Huang B, Pathria M, Resnick D, Smitaman E. Pes Anserinus: Anatomy and Pathology of Native and Harvested Tendons. AJR Am J Roentgenol. 2019;213(5):1107-16. doi:10.2214/ajr.19.21315- Pubmed
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