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Glenoid labrum: evaluation with MR imaging.

R A Garneau1, D L Renfrew, T E Moore

  • 1Department of Radiology, College of Medicine, University of Iowa, Iowa City 52242.

Radiology
|May 1, 1991
PubMed
Summary
This summary is machine-generated.

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Axial magnetic resonance (MR) imaging showed poor accuracy in detecting shoulder labral lesions. This study suggests MR imaging is insensitive and nonspecific for evaluating labral tears, necessitating further research.

Area of Science:

  • Orthopedics
  • Radiology
  • Medical Imaging

Background:

  • Shoulder instability is a common clinical problem.
  • Accurate diagnosis of glenoid labrum abnormalities is crucial for effective treatment.
  • Magnetic resonance (MR) imaging is frequently used to evaluate shoulder pathology.

Purpose of the Study:

  • To assess the diagnostic performance of axial MR imaging in detecting glenoid labral lesions in patients with shoulder instability.
  • To evaluate intra- and interobserver variability in MR image interpretation.

Main Methods:

  • Fifteen patients with shoulder instability and nine asymptomatic volunteers underwent MR imaging.
  • Shoulder joints were visualized arthroscopically or surgically in patients.
  • Two musculoskeletal radiologists interpreted MR images, blinded to clinical data and surgical outcomes.

Related Experiment Videos

  • Surgical and arthroscopic findings served as the reference standard.

    • Main Results:

    • Observer A sensitivity: 44.4%, specificity: 66.7%.
    • Observer B sensitivity: 77.8%, specificity: 66.7%.
    • Substantial intra- and interobserver variability was noted.
    • Specificities for asymptomatic volunteers were 100.0% (Observer A) and 88.9% (Observer B).

    Conclusions:

    • Axial MR imaging demonstrated low sensitivity and specificity for evaluating labral lesions in this cohort.
    • The findings suggest limitations of current MR imaging techniques for diagnosing labral tears.
    • Further investigation is required to establish the definitive role of MR imaging in assessing labral pathology.