• arises from the undersurface of the scapula
• multi-pennate muscle
• tendon passes beneath the corocoid process and deep to the pectoralis
• Contributes fibres to rotator sling and supraspinatus insertion
• Upper border forms part of anterior interval
• Tears are most common in association with advanced cuff disease.
• Subscapularis tendinopathy is more common at the superior border
• Tears may be associated with subluxation of the biceps tendon.
• If a tear involves the interval only, the displaced biceps tendon will lie above the subscapular tendon.
• If there is a more significant injury, the biceps tendon lies against the humeral head.
• An uncommon cause of tendinopathy is impingement deep to a prominent coracoid process
• In these patients, the corocoid process is usually elongated and
• the distance between its tip and the underlying humeral head is less than 9 mm
