(Fig 4-A.24) Osteochondral Injury in Patellar Dislocation

https://youtu.be/NsTOyzeRuFM

https://youtu.be/vzxclU_34OI?si=B88NykUJHSELzyAC

 

==============================================

🎥 Check Out All Videos at Once! 📺

👉 Visit Visualizing MSK Blog to explore a wide range of videos! 🩻

https://visualizingmsk.blogspot.com/?view=magazine

📚 You can also find them on MSK MRI Blog and Naver Blog! 📖

https://mskmri.tistory.com/

https://blog.naver.com/mskmri

https://www.instagram.com/msk_mri/

Click now to stay updated with the latest content! 🔍✨

==============================================

📌 MRI Findings in Lateral Patellar Dislocation

1️⃣ Osteoarticular Injuries

• After a lateral patellar dislocation, MRI commonly reveals characteristic injuries to osteoarticular structures. 
• Typical findings include bone contusions and osteochondral fractures, often located at the medial aspect of the patella and the anterolateral aspect of the lateral femoral condyle. Additionally, intra-articular osteochondral bodies and joint effusion are frequently observed in the acute setting.
• The osseous and osteochondral injuries related to transient lateral patellar dislocation are distinctive enough for accurate diagnosis, even if the patella has reduced. 

2️⃣. Lateral Condylar Defects

• In nearly all patients (80%–100%), bone edema of the lateral femoral condyle due to patellar impaction is observed. 
• Osteochondral lesions typically affect the anterolateral or mid-lateral aspect of the condyle.

3️⃣. Patellar Defects

• Approximately half of the cases with osteochondral defects show a classic concave impaction deformity of the inferomedial patella, a highly specific sign of prior patellar dislocation.

References

1. Radiographics. 2023 Jun;43(6).
2. RadioGraphics 2018; 38:2069–2101.
3. Skeletal Radiol (2012) 41:137–148.
4. RadioGraphics 2010; 30:961–981.

"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.

#MRI, #PatellarDislocation, #BoneContusions, #OsteochondralFractures, #LateralFemoralCondyle, #JointEffusion, #OsteoarticularInjuries, #OsseousInjuries, #PatellarDefects,