File:1562442208871-lg.jpg

(A) Posterior portal view of the right shoulder with a 30_ arthroscope. The humeral head (H) is on the lower right. The MGHL (labeled) sits approximately 1 cm medial to a significant abrasion lesion of the upper boarder of the subscapularis (*). (B) Posterior portal view of the right shoulder with a 30_ arthroscope. The glenoid (G) is visible on the left side of the field of view. With internal rotation of the humerus, the MGHL (labeled) can clearly be seen to be the offending lesion cutting into the upper subscapularis causing the pathology in the subscapularis. (MGHL, middle glenohumeral ligament.) Reproduce from Brady et al., with permission.