(A) Cross-Sectional Anatomy of a Normal Shoulder. Note the Close Relationship Between the Subscapularis Tendon and the Anterior Capsule. (B) A Magnified View of the Anterior Joint is Essentially Devoid of Fibrocartilage and is Composed of Tissues from Nearby Hyaline Cartilage, Capsule, Synovium, and Periosteum.

(From JawaA, RicchettiET. Glenulohumeral instability. In: Court-BrownCM, KeckmanJD, McQueenMM, et al., eds. Rockwood and Green’s Fractures in Adults. Vol 1. 8th ed. Philadelphia: Wolters Kluwer Health; 2015:1503–1571.)