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Interobserver reliability of acromial morphology classification: an anatomic study

J D Zuckerman1, F J Kummer, F Cuomo

  • 1Department of Orthopaedics, Hospital for Joint Diseases, New York, NY 10003, USA.

Journal of Shoulder and Elbow Surgery
|May 1, 1997
PubMed
Summary
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Shoulder surgeons showed poor agreement when classifying acromial bone shapes. This suggests relying less on acromial morphology and more on clinical findings and imaging for diagnosing impingement and rotator cuff tears.

Area of Science:

  • Orthopedic surgery
  • Anatomy
  • Radiology

Background:

  • Acromial morphology is often used to diagnose shoulder impingement and rotator cuff tears.
  • The Bigliani classification system is a common method for categorizing acromial shapes.

Purpose of the Study:

  • To assess the interobserver reliability of the Bigliani et al. classification system for acromial morphology.
  • To evaluate the diagnostic utility of acromial morphology in relation to impingement and rotator cuff tears.

Main Methods:

  • Three shoulder surgeons independently classified 110 acromial anatomic specimens.
  • The classification was based on the system described by Bigliani et al.

Main Results:

  • The study found a fair to poor level of interobserver reliability among the surgeons.

Related Experiment Videos

  • There was limited agreement in classifying acromial specimens.

    • Conclusions:

    • The assessment of acromial morphology has low diagnostic reliability for impingement and rotator cuff tears.
    • Clinical findings and rotator cuff imaging should be prioritized over acromial morphology in diagnosis.