(Fig 5-B.32) Subchondral Fracture with Epiphyseal Collapse: Part 2

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📌 Subchondral Fracture Insufficiency with Epiphyseal Collapse

1. Crescent Sign

• Observation: A crescent sign marked in aqua color in the subchondral bone or subchondral bone plate, extending into the adjacent articular cartilage.
• Details: Noticeable cortical step-off. In advanced cases, a fluid-filled cleft under the subchondral plate or an apparent osteochondral defect of the bone may be seen, corresponding to bone collapse or dissection associated with osteonecrosis after the fracture.

 

2. Irregularity of the Subchondral Bone Plate

3. Osteochondral Defect on Plain Radiography

• Observation: On plain radiographs, an osteochondral defect corresponds to bone collapse associated with osteonecrosis after the fracture.

 

✅  Epiphyseal or Articular Collapse

• Description: Epiphyseal or articular collapse refers to an irreversible stage of joint disease that often necessitates joint replacement. 
• This collapse significantly impacts the articular cartilage.

 

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#SubchondralFracture, #EpiphysealCollapse, #MRI, #CrescentSign, #SubchondralBone, #Osteonecrosis, #BoneCollapse, #JointDisease, #ArticularCartilage, #OsteochondralDefect