(Fig 5-B.13) Subchondral and Osteochondral Fracture

https://youtu.be/b6vOdRAnfHc

 

https://youtu.be/9qehWGE9dp4

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📌 Subchondral Fracture

• A subchondral fracture appears as a subchondral linear hypointensity, without an associated contour deformity or visible involvement of the articular surface. 
• On MRI, it is identified as a curvilinear hypointensity surrounded by bone marrow edema without associated contour deformity.

 

📌 Osteochondral Fracture

• Osteochondral fractures involve both articular cartilage and the subchondral bone plate. 
• They appear as a fracture line that violates the joint surface, subchondral bone plate depression, articular surface disruption and fragmentation, or a combination of these features. 
• The term "osteochondral fracture" is reserved for cases where subchondral bone depression or fragmentation creates an osteochondral fragment, typically in the setting of acute trauma.

 

References:

• RadioGraphics 2018; 38:1478–1495
• J Clin Orthop Trauma. 2021 Sep 25;22:101610

• AJR 2019; 213:963–982

 

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#SubchondralFracture, #OsteochondralFracture, #Radiology, #MRI, #BoneContusion, #ArticularSurface, #BoneMarrowEdema, #Trauma, #MedicalImaging, #Orthopedics