Figure 2.

Anatomy of the rotator interval, including illustrations in (A) coronal and (B) sagittal planes and (C) corresponding sagittal magnetic resonance proton density–weighted arthrogram show boundaries of the rotator interval, which are defined by the coracoid process (COR) at its base, superiorly by the anterior margin of supraspinatus tendon (SST), and inferiorly by the superior margin of the subscapularis tendon (SSc). Contents of the rotator interval include the long head of biceps tendon (BT), coracohumeral ligament (CHL), superior glenohumeral ligament (SGHL), and rotator interval capsule. The rotator interval capsule (RIC) is the anterosuperior aspect of the glenohumeral joint capsule, which merges with CHL and SGHL insertions medial and lateral to the bicipital groove. The CHL arises from the base of coracoid process, traverses through the subcoracoid fat, and inserts on the anterior humerus. IST, infraspinatus tendon. Reproduced with permission from Petchprapa et al.⁵²