Subscapularis Tendon Tears: Identifying Mid to Distal Footprint Disruptions

Abstract 

We present an arthroscopic technique used to identify mid to distal subscapularis tendon disruptions. These tears can be easy to miss and require a thorough arthroscopic evaluation of the medial biceps sling and the medial side wall of the bicipital groove to detect. The arthroscopic procedure is performed with the patient in the lateral decubitus position, and the same portals used for standard subscapularis repair are used for this technique. If a high degree of clinical suspicion exists for subscapularis pathology and no tendon disruption is initially identified, an inspection of the medial biceps sling and medial side wall of the bicipital groove may show mid to distal subscapularis tendon disruptions. A 70° arthroscope is essential in visualizing the medial sling, the subscapularis tendon, the biceps tendon, and the proximal 2 cm of the bicipital groove. Any disruptions or rents in the medial sling or medial side wall are suggestive of a subscapularis tear. Once a tear is identified, we proceed with a biceps tenodesis and then take down the medial sling from the lesser tuberosity to better delineate the subscapularis footprint. The subscapularis may then be repaired in standard fashion.