(Fig 5-B.23) ICRS Staging System of Osteochondritis Dissecans

https://youtu.be/_ZXfgm_QDu0

 

https://youtu.be/9qehWGE9dp4

👉 Click the link below and request access—I’ll approve it for you shortly!
https://www.notion.so/MSKMRI-KNEE-b6cbb1e1bc4741b681ecf6a40159a531?pvs=4
==============================================

✨ Join the channel to enjoy the benefits! 🚀
https://www.youtube.com/channel/UC4bw7o0l2rhxn1GJZGDmT9w/join
==============================================

👉 "Click the link to purchase on Amazon 🎉📚"
[Visualizing MSK Radiology: A Practical Guide to Radiology Mastery]
https://www.amazon.com/dp/B0DJGMHMFS
==============================================

MSK MRI Jee Eun Lee

Visualizing MSK Radiology: A Practical Guide to Radiology Mastery

👉 Click the link below and request access

📌ICRS Staging System of Osteochondritis Dissecans

• The International Cartilage Repair Society (ICRS) grading system is adapted for MRI to clinically and arthroscopically evaluate osteochondritis dissecans (OCD).
• As OCD progresses, fragmentation and detachment of the subchondral bone are observed. 
• This process of osteochondral fragmentation starts in the deep portion under the articular surface and eventually involves the superficial articular cartilage, suggesting an "inside-out" mechanism.

 

✅ Stage 1 OCD

• Description: Stable lesion in continuity with the host bone and covered by intact articular cartilage.
• Imaging: The cartilage appears continuous with the bone, and no significant fragmentation is visible.

 

✅  Stage 2 OCD

• Description: Stable lesion showing partial discontinuity of the cartilage from the host bone.
• Imaging: Partial separation of the cartilage from the underlying bone is observed, indicating some degree of instability.

 

✅  Stage 3 OCD

• Description: Unstable lesion showing complete discontinuity of the "dead in situ" lesion. However, the fragment is not dislocated.
• Imaging: A clear gap between the lesion and the host bone, but the fragment remains in place.

 

✅  Stage 4 OCD

• Description: Presence of an osteochondral defect with a dislocated fragment.
• Imaging: The lesion is completely separated from the host bone, with the fragment displaced.

 

References

• J Clin Orthop Trauma. 2021 Sep 25;22:101610
• Japanese Journal of Radiology (2022) 40:443–457

 

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

© 2022 MSK MRI Jee Eun Lee All Rights Reserved.

No unauthorized reproduction, redistribution, or use for AI training.

#ICRS #OCD #OsteochondritisDissecans #Radiology #MRI #Arthroscopy #CartilageRepair #BoneFragmentation #MedicalImaging #Orthopedics