Fig 2.

Right shoulder viewed from posterior viewing portal. In the setting of a retracted subscapularis tear, the medial sling tears away from the bone with the subscapularis tendon. The medial sling forms a distinctive comma-shaped arc of soft tissue (blue comma) at the superolateral corner of the subscapularis. As shown in this photograph, the comma sign serves as a landmark for locating a retracted subscapularis tendon. (G, glenoid; H, humeral head, SSc, subscapularis tendon.) (Reprinted with permission.²⁰)