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Enneking’s Stages of Osteonecrosis

  Stage        Pain                         Radiographs

     I                None                      Slight increased density
     II               None                      Reactive rim
     III             Occassional             Crescent sign
     IV             Limp                        Step off flattening
     V              Continuous               Collapse
     VI             Severe                     Deformed

- example of symptomatic stage IV lesions.

 

   


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