What are early radiographic findings indicative of femoral head avascular necrosis (AVN)?

Updated: Oct 22, 2018
  • Author: John D Kelly, IV, MD; Chief Editor: Craig C Young, MD  more...
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Early radiographic findings in femoral head AVN include femoral head lucency and subchondral sclerosis. With disease progression, subchondral collapse (ie, crescent sign) and femoral head flattening become evident radiographically. Joint space narrowing is the end result of untreated femoral head AVN.

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