(Fig 1-C.14) Medial Meniscal Extrusion

https://youtu.be/Bnw0ePs9EAo

https://youtu.be/VHbQLFiofuc

✅ Meniscal Extrusion Overview:

• Meniscal extrusion occurs when the meniscus extends 3 mm or more beyond the tibial plateau edge.
• Substantial medial meniscus extrusion (> 3 mm) indicates severe meniscal issues like degeneration, extensive tears, and root involvement.
• Extrusion is commonly associated with posterior root tears but can also be caused by large radial tears, osteoarthritis, and knee malalignment.

 ✅ What’s new

• Orthopedic literature commonly indicates that meniscus extrusion is often caused by medial meniscus (MM) posterior root tears. However, recent evidence suggests the reverse may also be true, where meniscus extrusion could lead to root tears. 
• This is based on observations from serial imaging studies showing that disruption of the meniscotibial ligament and meniscus extrusion may increase stress at the root, potentially causing a tear. 
• Consequently, there’s growing interest in surgically reducing meniscus extrusion through meniscotibial ligament repair to address this issue.

Radiographics. 2023 Jul;43(7):e220208.

"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"

© 2022 MSK MRI Jee Eun Lee All Rights Reserved.

#VisualizingMSK  #meniscaltear #meniscus #Roottear #Meniscalextrusion