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avascular necrosis (AVN) staging


  Stage                CT/xray                    bone scan
  -----                -------                    ---------

   I                   -                          cold/hot spot

   II                  sclerotic focus with
                         osteopenic ring

   III                 "crescent sign"
                         (subchondral lucency)

   IV                  articular collapse
                       flattening of femoral head



sensitivity            86%                        78%
specificity            79%                        75%

see also: avascular necrosis (AVN)


Brian Funaki, MD  -  8 February 1995
Last updated:  1 October 2013


 

Related CHORUS documents:
avascular necrosis (AVN)
Kienbock disease
systemic lupus erythematosus (SLE)
sickle cell anemia: bone manifestations
Gaucher disease
pancreatitis

 

Copyright © 2013, Charles E. Kahn, Jr.