(Fig 3-B.14) Intra-Articular Partial Tear of the Popliteus

https://youtu.be/6K1y-UwRZb8

https://youtu.be/6WOItzqJj1g

 

📌 Popliteus Tendinosis and Tenosynovitis

✅ Etiology and Pathogenesis

• Repetitive stress on the popliteus can lead to popliteus tendinosis and tenosynovitis.
• There is no acute event associated with these conditions.

 

✅ MR Imaging Findings

★ Tendinosis

• On T2-weighted MR images, the popliteus tendon may show increased intrasubstance signal.
• Tendon enlargement and intrasubstance intermediate signal are characteristic features of popliteus tendinosis.
• Interstitial splitting and partial tearing may be superimposed upon tendinosis.

★ Tenosynovitis

• Fluid surrounding the popliteus tendon in the absence of joint effusion should raise suspicion of tenosynovitis.

 

✅ Clinical Associations

• Popliteus tendinosis results from chronic repetitive stress and may be seen in downhill runners.

 

RadioGraphics 2014; 34:496–513

MRI Web Clinic - April 2022 Pathology of the Popliteus Tendon

 

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