Nov 18, 2025 · An os acromiale is an anatomical variant that represents an unfused accessory center of ossification of the acromion of the scapula.

Case Discussion Os acromilale is a normal variant, but can be associated with rotator cuff impingement.

Axial view of the shoulder shows Os acromiale. Shoulder AP oblique (standing) radiograph shows reduction in acromio-humeral distance.

An os acromiale represents an unfused accessory center of ossification of the acromion of the scapula. These images are from Dr. John Hunter's amazing MSK collection.

Os acromiale is an anatomical variant representing an unfused accessory center of ossification of the acromion of the scapula. In most cases, it is asymptomatic and discovered as an incidental …

The anatomical variant os acromiale is best seen on the axial view. This is a supplementary view that is typically performed when a possible acromioclavicular or glenohumeral …

Jul 16, 2025 · Differential diagnosis os acromiale: common unfused acromion accessory ossification center

Hypointense line traversing the distal acromion in keeping with an os acromiale with a fibrous synchondrosis. There is edema of the os together with focal effusion of the subjacent …

Just posterior - lateral to normal Acromio-clavicular joint, there appears to be 'another joint' - due to os acromiale. Normal and intact cuff. Mild thickening of subdeltoid-subacromial bursa.

May 6, 2025 · It is associated with an eventual os acromiale formation (86% vs 4% control) and rotator cuff tear (after age >25 years) if the cause of the shoulder stress is not discontinued.