Acromioclavicular joint dislocation - Rockwood III

Case contributed by Domenico Nicoletti
Diagnosis almost certain

Presentation

Fall from a horse. Right shoulder pain.

Patient Data

Age: 20 years
Gender: Male

Subtle elevation of the distal right clavicle, with suggestion of coracoclavicular widening.

Abnormal displacement of the fibrocartilaginous meniscus that appears hyperecogenic

On the T2-weighted sequences one appreciates abnormal displacement of the fibrocartilaginous meniscus that appears hypointense within the AC joint. The acromioclavicular and coraco-acromial ligaments are disrupted.

Annotated images showing the displaced articular meniscus. 

Case Discussion

In the dislocation type III is appreciable lesion of the acromion-clavicular and coraco acromial ligaments (periosteal sleeve in children, rarely in adults) with increase of coraco-acromial  space. Sometimes it can detect extra articular dislocation of the meniscal fibrocartilage.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

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

 Thank you for updating your details.