(Fig 5-A.06) Acute Traumatic and Degenerative Cartilage Lesions

https://youtu.be/c9fzajX_DU8

 

 

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📌 Cartilage Appearances on MRI

• Cartilage appearances on MRI may vary depending upon the traumatic or degenerative cause and, at times, may be difficult to differentiate between the two.

 

 

✅ Acute Traumatic Lesions

• Characteristics:
  • More acute injuries tend to have more linear features or squared-off margins.
  • Sharply demarcated chondral lesions with a narrow transition zone.
• Examples:
  • Osteochondral fractures
  • Chondral fissures and flaps following shearing forces secondary to transient patellar dislocation
  • Osteochondral impaction injuries following tangential and rotational forces causing ACL tear

 

✅ Degenerative Lesions

• Characteristics:
  • More chronic disease tends to have rounded or gradated margins.
  • Shallow chondral defects with a wide transition zone.
• Examples:
  • Diffuse chondral thinning with varying degrees of bone marrow edema-like signal
  • Subchondral sclerosis
  • Cyst-like changes

 

References:

• J Clin Orthop Trauma. 2021 Sep 25;22:101610
• RadioGraphics 2022; 42:1457–1473

 

 

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