Figure 8a. Avulsion fracture of the greater tuberosity in a 32-year-old man with anterior shoulder instability. (a, b) Longitudinal (a) and transverse (b) 12-5-MHz US images demonstrate interruption of the continuity of the humeral surface (arrowheads in b) and a small fragment of bone (arrow) displaced superiorly into the supraspinatus tendon (SS). (c) Radiograph helps confirm the presence of an avulsion fracture (arrow).