Magnetic resonance imaging of the glenoid labrum.

Shoulder complaints are common in the athletic population. Successful treatment is dependent upon the ability to correctly identify the pathologic changes associated with a specific disorder and arrive at an accurate diagnosis. Labral abnormalities are traditionally associated with glenohumeral instability. Isolated labral tears or degenerative changes may also cause shoulder dysfunction. A reliable clinical tool to assess the status of the labrum would be useful for diagnosis and management of shoulder disorders. The magnetic resonance images of 48 shoulders that had subsequent surgical examination of their labra were reviewed with respect to labral appearance. Labra appearing as abnormal were further classified as torn, degenerative, or eroded. Surgical examination was used as the reference standard. Magnetic resonance imaging demonstrated high levels of sensitivity, specificity, positive and negative predictive values, and accuracy for evaluation of the glenoid labrum. Magnetic resonance imaging is a reliable and accurate method for depicting the status of the glenoid labrum. Magnetic resonance imaging appearance of the labrum may assist the clinician in distinguishing the varying forms of shoulder dysfunction and facilitate diagnosis and effective treatment.