✅ Knee MRI Mastery/Chap 3.Collateral Ligaments

(Fig 3-B.09) Complete Distal LCL Tear with Retraction

MSK MRI 2024. 5. 21. 21:47

https://youtu.be/--idGICYg8g

https://youtu.be/6WOItzqJj1g

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📌Posterolateral Corner (PLC) Injuries

  • Low-grade PLC injuries are often managed non-operatively
  • Significant PLC injuries involving the biceps femoris, fibular collateral ligament, and/or popliteus may require surgical intervention

 

✅ MRI Assessment of PLC Injuries

  • Evaluating PLC injuries with MRI is challenging due to anatomic complexity
  • However, larger PLC structures are easy to assess with standard MRI techniques
  • Direct visualization of small structure involvement on MRI is not necessary to report a clinically unstable PLC injury

 

✅ Key Information Needed Extent of Injury

  • Is there injury to the biceps femoris, lateral collateral ligament, or popliteus?
  • If so, is it a low-grade partial tear, high-grade partial tear, or full-thickness tear?
  • Is there injury or evidence of injury (e.g., edema) to smaller PLC structures like the arcuate ligament, fabellofibular ligament, or popliteofibular ligament?
  • Are there additional injuries present involving a cruciate ligament, collateral ligament, hyaline cartilage, or bone?

 

Radiol Clin North Am. 2018 Nov;56(6):935-951.

 

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