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✅ Knee MRI Mastery/Chap 1. Meniscus

(Fig 1-B.47) Lateral meniscocapsular separation associated with fracture

by MSK MRI 2024. 2. 7.

https://youtu.be/4hz6ZwEn2bQ

https://youtu.be/nKQsItyKAtM

🔴🇰🇷Summary of the information regarding lateral meniscocapsular separation:

  • 1️⃣Occurrence with Fractures and ACL Tear: 
  • Lateral meniscocapsular separation can occur alone or in conjunction with tibia or femur fractures or an ACL tear. The focus here is on cases where it occurs with lateral femoral condyle fractures.
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  • 2️⃣Injuries in Tibial Plateau Fractures and ACL Ruptures: 
  • There is a known occurrence of injuries at the lateral meniscocapsular junction region in patients with tibial plateau fractures and ACL ruptures.
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  • 3️⃣MRI Indicators: In cases of tibial plateau fracture, MRI may suggest lateral meniscocapsular separation when there is:
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  • 4️⃣"Floating Meniscus" Appearance: 
  • This term describes the appearance of fluid surrounding a detached meniscus in acute trauma, associated with discontinuity of the meniscotibial capsular ligament (reference: AJR 2005; 184:200–204).
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  • 5️⃣Role of Popliteomeniscal Fascicles: 
  • These fascicles connect the popliteus tendon to the posterior horn of the lateral meniscus, forming parts of the popliteal hiatus. They limit excessive motion of the lateral meniscus during knee extension.



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