Os acromiale

Case contributed by Maulik S Patel
Diagnosis almost certain


Non-traumatic left shoulder pain since a few weeks.

Patient Data

Age: 50 years
Gender: Female

Acromion is fragmented but shows corticated margins.


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.

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