Os acromiale. (A rare cause of shoulder pain)

Video Description

The acromion is formed from multiple ossification centers which fuse between the
age of 12 and 25 years. If one of the ossification centers fails to fuse, an accessory ossicle is formed known as os-acromiale. The os-acromiale is named according to
the fragment located anterior to the unfused site. Hence, three types of os-acromiale.
are described known as:
Pre-acromion.
Meso-acromion.
Met-acromion.