Alan M. Hirahara, MD, FRCSC
Orthopaedic SurgeonSpecialist in Sports Medicine

Shoulder Instability

Shoulder instability can be anterior, posterior, inferior, or multidirectional (MDI).  Instability can result from traumatic or non-traumatic etiology.  Causes of instability can be labral tears, bone loss, capsular stretching, capsular looseness, capsular tearing (i.e. HAGL lesions), rotator cuff tears, and other sources.  Because no one problem can result in shoulder instability, diagnosis can be challenging; symptoms can vary; and treatments will be dependent on the reason for the instability.  Commonly, x-rays and an MR arthrogram will be necessary to fully evaluate the problem to help develop the proper treatment plan.

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