- Discussion:
- results from failure of an anterior acromial ossification center to fuse to the acromial process;
- caused by failure of one of three ossification centers;
- ossification centers appear at age 15 and should fuse by age 22-25;
- subtypes: (from anterior to posterior)
- preacromion, mesacromion, metacromion, and basiacromion types;
- mesacromion and metacromion are most common;
- patients may show impingement like symptoms but will also have localized tenderness;
- strong association with rotator cuff tear;
- references:
- Rotator cuff tears associated with os acromiale.
- Rotator cuff tears associated with os acromiale.
- Os acromiale: frequency, anatomy, and clinical implications.
- Radiographs:
- may be seen axillary or Stryker notch views;
- reference:
- The double-density sign: a radiographic finding suggestive of an os acromiale.
- Treatment:
- references:
- Os acromiale: anatomy and surgical implications.
- Os acromiale associated with tear of the rotator cuff treated operatively. Review of 33 patients.
- Surgical management of the symptomatic os acromiale.
- Arthroscopic decompression of shoulder impingement secondary to os acromiale.
- Internal fixation of symptomatic os acromiale: a series of twenty-six cases.
- Transacromial approach to obtain fusion of unstable os acromiale.
- The treatment of symptomatic os acromiale
Os acromiale: evaluation and treatment.
Surgical treatment of os acromiale with and without associated rotator cuff tears.
Painful os acromiale (or unfused acromial apophysis) in athletes.