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The Femoral Head Edema Zone: A Novel Classification Scheme to Better Predict Osteonecrosis Progression

This study proposed a new classification, the Edema Zone classification, that uses Magnetic Resonance Imaging (MRI) images to grade the extent of edema in osteonecrosis of the femoral head (ONFH). The purpose of the study was 1) to examine how the Edema Zone classification compared to the Japanese Investigation Committee (JIC) classification’s prognostic ability for early conversion to total hip arthroplasty (THA), and 2) to determine how accurately and reliably the Edema Zone classification performed as a classification system.

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Source:  The Journal of Arthroplasty

  • University of Illinois
  • Rush Medical College in Chicago
  • Hospital for Special Surgery
  • ortho carolina
  • Arthroscopy Association of North America
  • American Academy of Orthopedic Surgeons
  • American Orthopedic Society for Sports Medicine
  • International Society for Hip Arthroscopy