Posterior shoulder dislocation

Case contributed by Dr Alexandra Stanislavsky

Presentation

10 year old girl presenting with left shoulder pain after pushing a heavy object.

Patient Data

Age: 10 years
Gender: Female
X-ray

Single AP view of the shoulder demonstrates lack of overlap between the glenoid and the humeral head. The shoulder is rotated such that the humeral head has a 'light bulb' appearance. 

X-ray

Both the lateral and especially the axillary view clearly demonstrate the relationship between the glenoid and the humeral head, and confirm a posterior dislocation.

Annotated image

On both views the acromium (A), clavicle (Cl), coracoid process (Co) and glenoid (G) are identifiable, and the humeral head can be seen lying posterior. 

The patient went on to have closed reduction in the emergency department. 

X-ray

Post reduction film demonstrate the anterior rim of the glenoid and humeral articular surfaces appearing congruent.

Annotated image

Dislocation film demonstrates no congruency between the glenoid articular suface (blue) and that of the humeral head (yellow). In addition due to internal rotation the proximal humeral head has a rounded appearance, likened to a light bulb (light green). 

Post reduction film demonstrate the anterior rim of the glenoid (blue) and humeral (yellow) articular surfaces appearing congruent.

Case Discussion

Typical appearances of a posterior shoulder dislocation, demonstrating the relatively subtle AP findings. 

PlayAdd to Share

Case information

rID: 10778
Case created: 20th Sep 2010
Last edited: 25th Sep 2017
Inclusion in quiz mode: Included

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.