(Fig 3-A.50) Pes Anserine Bursitis

https://youtu.be/0O2v9TRYmZ0

https://youtu.be/GSIg93UH3Oc

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📌Pes Anserinus Bursitis

Pes anserinus bursitis refers to inflammation of the bursa located deep to the conjoined tendons (pes anserinus) on the medial aspect of the knee.

✅ Anatomic Considerations

• Bursa does not communicate with knee joint cavity
• Located deep to semitendinosus, gracilis, and sartorius tendons
• Most frequently distal to joint line along distal superficial MCL and tibial metaphysis

 

✅ Etiology

• Associated with athletic activity
• Degenerative arthritis

 

✅ Imaging Findings

• Increased bursal fluid
• Thickened bursal wall
• Surrounding edema
• Abnormal enhancement
• Septated fluid collection with bursa superficial to MCL, deep to sartorius/gracilis tendons

★ Anatomic Note

• Sartorius enveloped by crural fascia layer 1
• Gracilis/semitendinosus between layers 1 and 2
• Gracilis tendon within septated fluid, sartorius more superficial

Semin Musculoskelet Radiol. 2016 Feb;20(1):12-25

Stoller's Orthopaedics and Sports Medicine: 

The Knee: Includes Stoller Lecture Videos and Stoller Notes

AJR 2019; 213:1107–1116

 

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