Intramuscular synovial cyst of the shoulder.

In this article, we report a case of intramuscular synovial cyst of the rotator cuff musculature with associated supraspinatus and infraspinatus tears. The patient was treated arthroscopically with cyst decompression and inside-out rotator cuff repair. We also present a review of the current literature on intramuscular synovial cysts of the rotator cuff.