Os acromionle
An os acromionale happens when the acromion does not fuse to
the spine and body of the scapula. It occurs in 8% of the general population. It
may be an incidental finding, but is also associated with subacromial
impingement and disorders of the underlying rotator cuff.
Anatomy
The acromion forms from 4 growth centres, all of which ususally fuse by the age
of 25.
The kind of os acromionale depends on where the non fusion exists.
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