Occurs via direct trauma to the adducted shoulder
Accounts for 40% of all shoulder injuries and 10% of all injuries in collision sports (football, hockey, etc.)<unk>  (AC) and coracoclavicular (CC) ligaments may be affected
Routine use of stress radiographs is controversial (low yield)
Acromioclavicular joint injury
Traumatic/Acute:
Ankle syndesmosis injury
Shoulder Dislocation
Scapular fracture
Anterior shoulder dislocation
Lunotriquetral ligament instability
Posterior shoulder dislocation