- 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) (
see diagram)
- 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. MK Mudge et al. Vol 66-A. 1984. p 427-429.
-
Rotator cuff tears associated with os acromiale.
-
Os acromiale: frequency, anatomy, and clinical implications.
-
Radiographs:
- may be seen
axillary or
Stryker notch views;
- references:
-
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. MR Hutchinson and MA Veenstra. Arthroscopy Vol 9. 1993. p 28-32.
-
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 associated with tear of the rotator cuff treated operatively. Review of 33 patients.
Internal fixation of symptomatic os acromiale: a series of twenty-six cases
The Double-Density Sign: A Radiographic Finding Suggestive of an 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.
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