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Case of the Week 536



What is the most likely diagnosis?

  • 48 year-old with injury 6 months earlier



Lateral Radiographs of the Ankle

  1. Fracture of Fixation Screw
  2. Osteochondritis Dissecans
  3. Metastatic Breast Carcinoma
  4. Osteomyelitis
  5. Avascular Necrosis of Talus

Additional Image-None

 

Additional Images

 


Sagittal CT Image of the Talus


Answer:

 

5. Avascular Necrosis of Talus

 

More (Click Discussion Tab)

 

 

Avascular Necrosis of Talus

General Considerations

  • The vascular supply to the talus consists of relatively small vessels combined with poor collateral circulation which predispose the talus to avascular necrosis when there is a disturbance of its blood supply
  • The talus is also covered by a large percentage of articular cartilage which is not penetrated by blood vessels

 

MORE . . .

 


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