📌The Popliteofibular Ligament
✅ Anatomy
- The popliteofibular ligament extends from the popliteus tendon near the myotendinous junction to the posteromedial aspect of the fibular styloid process, posteromedial to the biceps femoris tendon insertion.
- On coronal MRI images, the popliteofibular ligament can be identified just deep to the lateral geniculate vessels.
- Coronal images provide the best visualization of this ligament.
✅ Injury Patterns Avulsions
- Avulsions from the fibular styloid process can occur
- Partial Tears: Typically appear as increased intrasubstance or peritendinous signal intensity on MRI
- Complete Tears: In the setting of a ruptured popliteofibular ligament, surgical reconstruction is currently advocated to restore normal tibiofemoral stability and kinematics.
✅ Reporting Findings
- No imaging criteria to definitively diagnose posterolateral corner instability
- However, complete tears of the major stabilizers (popliteus tendon, popliteofibular ligament, and lateral collateral ligament) should be reported as suspicious for posterolateral instability, especially when : Two or more components are involved or There is a concomitant cruciate ligament injury
RadioGraphics 2016; 36:1776–1791
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