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… Click to show full abstract
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.
               
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