Fracture of the Greater Tuberosity
The greater tuberosity is the insertion site for attachment of rotator cuff tendons. Greater tuberosity fractures are uncommon and are seen in cases of shoulder dislocations and osteoporosis. The greater tuberosity fragment is pulled off when the cuff muscle contracts or the anterior shoulder dislocates. Direct impact to the shoulder can cause the bone of the tuberosity to break into multiple fragments. Partial rotator cuff tears often accompany non-displaced fractures and these fractures can be diagnosed using MRI or diagnostic arthroscopy.