There was moderate subacromial and subdeltoidal bursitis and hypertrophic ac-joint changes with inferior capsule thickening, and a pre-acromion type of Os acromiale.
A bony decompression or resection of Os acromiale was not performed, but bursectomy and coraco-acromial ligament released.
The patient then underwent routine rotator cuff repair and arthroscopic resection of an Os acromiale two weeks after grand final festivities.
An os acromiale (OA) originates from failure of fusion of the anterior acromial apophysis (Kurtz et al., 2006).
This case report presents the results of successful management of a painful os acromiale associated with rotator cuff impingement in a competitive swimmer, based on ultrasonography diagnosis, a low cost and dynamic exam, and a specific conservative treatment.
The right acromioclavicular joint was normal, but adjacent to it was "another pseudo-joint" (os acromiale) surrounded by hypertrophic changes of the tissues and little oedema.
An examination of os acromiale
ties in nicely with a look at acromioclavicular joint injuries.
We discuss some of the more commonly symptomatic bones, namely the os acromiale, os styloideum, metacarpal and hallux sesamoids, patella, os trigonum, os calcaneus secundarius, accessory navicular, os peroneum, and os intermetatarseum.
An os acromiale results from the failure of 1 of these centers to fuse.
An os acromiale can contribute to shoulder impingement symptoms.
If there is a failure of the anterior acromial apophysis to unite, an os acromiale is present (Fig 2).
This condition was described as early as 1863, when Gruber noted the presence of an os acromiale with fibrocartilaginous union of the anterior acromial ossification centers in three out of 100 cadaveric specimens (in a review by Kurtz and colleagues (2)).