Highlights
The most common acromioclavicular joint cyst (AJC) is associated to a rotator cuff tear (type 2).
MRI provides a correct diagnosis, even of the type of AJC.
Type 1 AJC should be surgically treated by excision and resection of the lateral clavicle.
Type 2 AJC could be surgically treated by reverse total shoulder replacement.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.