Posterior shoulder instability
Recurrent shoulder dislocation with shoulder pain and limited movement.
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- posterior dislocation of the left shoulder joint with posterior translation of the humerus relative to the glenoid.
- the humeral head shows internal rotation with light-bulb appearance on the CT scout view.
- depression fracture antero-medial humerus is noted (Trough's sign).
- fracture posterior inferior glenoid bone (reversed Bankart's lesion)
- Bennet's lesion with linear calcification adjacent to a focal sclerosis in the posterior osseous glenoid as well as posterior labro-capsular periosteal sleeve avulsion (POLPSA) lesion.
- mild joint effusion.
Posterior shoulder instability (dislocation) with fracture of the antero-medial humerus (Trough sign), reversed osseous Bankart's lesion as well as Bennet's lesion of the posterior inferior labrum with POLPSA lesion and joint effusion.