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Avascular necrosis (pathophysiology (failure of blood supply to the…

- - - - extravascular compression
        
        marrow fat enlargement
      - vessel wall injury
        
        chemotherapy
        
        radiation
      - thromboembolic event
        
        fat emboli
- - - - groin
      - exacerbated by WB
      - relieved by rest
  - - - esp abd
- - - - femoral head flattening
    - - subchrondral collapse
- - - - core decompression
      - bone grafting
    - - THJR
      - resurfacing arthroplasty