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Posterior superior glenoid impingement: expanded spectrum

C M Jobe1

  • 1Department of Orthopaedic Surgery, Loma Linda University School of Medicine, California 92350, USA.

Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association
|October 1, 1995
PubMed
Summary

Posterior superior glenoid impingement, often from repetitive overhead activities, can cause rotator cuff injuries. This condition may affect multiple shoulder structures beyond the rotator cuff, including the labrum and bone.

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Area of Science:

  • Orthopedics
  • Sports Medicine
  • Anatomy

Background:

  • Posterior superior glenoid impingement is an emerging cause of rotator cuff injury.
  • Repetitive overhead activities are the typical mechanism, particularly in athletes.

Purpose of the Study:

  • To broaden the understanding of posterior superior glenoid impingement.
  • To identify the range of activities causing this injury.
  • To determine the spectrum of shoulder structures at risk.

Main Methods:

  • A retrospective review of 11 patients with documented injuries.
  • Analysis of patient recall regarding the mechanism of injury.
  • Correlation with arthroscopic or imaging findings.

Main Results:

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  • The study identified 11 cases with clear injury mechanisms and objective documentation.
  • A significant number of injuries were not sports-related (6 out of 11).
  • The majority of patients sustained damage to multiple shoulder structures.

Conclusions:

  • Posterior superior glenoid impingement involves potential injury to the superior labrum, rotator cuff, greater tuberosity, inferior glenohumeral ligament/labrum, and superior glenoid bone.
  • Damage to one structure warrants investigation of the others.
  • The mechanism extends beyond athletic overuse and affects multiple anatomical components.