✅ Knee MRI Mastery/Chap 1. Meniscus

(Fig 1-C.03) Type I Complete discoid meniscus

MSK MRI 2024. 2. 8. 20:03

https://youtu.be/HvfRIfFryPs

https://youtu.be/VHbQLFiofuc

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🤔Discoid Meniscus Overview:

  • The discoid meniscus of the knee is a congenital or developmental variant with a thick, disc-like shape and central hypertrophy, leading to an increased width of the meniscal body. 
  • It typically lacks standard posterior meniscocapsular and ligamentous attachments, with the ‘discoid meniscus’ term covering a broad spectrum of shapes and stability levels, mainly affecting the lateral meniscus.

 

🤔Type I:

  • A complete discoid lateral meniscus, characterized by a block-shaped structure that spans the entire tibial plateau width, maintaining normal posterior capsular attachment.



🤔 Several indirect signs of a discoid lateral meniscus

 

- Changes in lateral tibial spine height

- Lateral joint space height

- Fibular head height

- Lateral tibial plateau obliquity

- The condylar cut-off sign

- Squaring of the lateral femoral condyle

- Cupping of the lateral tibial plateau

- A lateral femoral condylar notch

 

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