Os acromiale: anatomy and surgical implications

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Edelson JG. Zuckerman J. Hershkovitz I. Journal of Bone & Joint Surgery - British Volume. 75(4):551-5, 1993 Jul. We examined 270 scapular bones and found an incidence of os acromiale of 8.2%. In most cases, the free fragment was approximately one-third of the overall length of the acromion, and included the acromioclavicular facet and the principal areas of attachment of the coracoacromial ligament. Two -thirds of the specimens showed a distinctive pattern of osteophytic lipping. Based on this study, we devised operative procedures for symptomatic patients, and operated upon seven, with good results in six.