📌 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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