Posterior shoulder instability.
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Tears of the labrum can develop after acute trauma or repetitive microtrauma. In the cumulative microtrauma model, a Kim lesion may develop. This is thought to occur with cumulative rim loading secondary to persistent shoulder subluxation or microtrauma. This pathologic process leads to a loss of chondrolabral containment, with subsequent development of posterior labral marginal cracks and undermining of the labrum or partial avulsions of the glenoid labrum.
Case courtesy: Dr Eleonora Renzi