"It may cause shoulder impingement, rotator cuff tear, or degenerative acromioclavicular joint disease 5."
Expected headings
"Gross anatomy"
"Subtypes"
"It is thought to increase the risk of shoulder impingement presumably due to increased mobility of the unfused secondary centre. There is, however, no statistical difference in the incidence of supraspinatus and infraspinatus tears between patients with an os acromiale and a normal control group 3."
"The subtypes develop due to the fusion pattern of the three acromial ossification centres (preacromion, mesoacromion and meta-acromion) 4 and are classified on their pattern of articulation with the acromion (from proximal to distal) 5:"
"an os acromiale is readily identified in patients with pathology (e.g. rotator cuff tears)"