Presentation
Non-traumatic left shoulder pain since a few weeks.
Patient Data
Age: 50 years
Gender: Female
From the case:
Os acromiale
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Shoulder AP oblique standing view

Acromion is fragmented but shows corticated margins.
From the case:
Os acromiale
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Just posterior - lateral to normal Acromio-clavicular joint, there appears to be 'another joint' - due to os acromiale.
Normal and intact cuff.
Mild thickening of subdeltoid-subacromial bursa.