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Posterior Labral Repair for Management of Uncomplicated Posterior Shoulder Instability
Posterior instability of the glenohumeral joint was originally thought of in terms of macroinstability, or posterior glenohumeral dislocation. Although posterior dislocation can occur in select patients, it is usually the result of more violent trauma, electrocution, or seizure disorders. Posterior shoulder subluxation with or without labral tearing (that is, microinstability) is the more common but perhaps historically less recognized manifestation of posterior glenohumeral instability. This subluxation may be more challenging to diagnose, with patients often presenting with vague symptoms and subtle findings on physical examination. Sports medicine clinicians are likely to encounter many patients who have posterior shoulder subluxation with or without labral tearing.