Editorial Commentary: Lower Trapezius Transfer May Be Indicated for Surgical Management of Massive Irreparable Rotator Cuff Tears in Younger, Non-Arthritic Patients.

Although shoulder rotator cuff repair fixation constructs and suture anchor design have evolved, repair of massive or functionally irreparable tears historically has relied on tendon mobilization and compression, optimizing footprint biology, and attempting a tension-free repair. However, despite these efforts, rates of failure of complete healing may be high, ranging from 20% to 94%. This has led to a search for alternative approaches, including bridging grafts, subacromial balloons, superior capsular reconstructions, biologic tuberoplasties, bursal acromial grafts, and, ultimately, renewed interest in tendon transfers. The latissimus dorsi transfer was traditionally a preferred tendon-transfer technique for posterosuperior massive cuff tears, but inconsistent outcomes have resulted in declining popularity. Recently, the lower trapezius transfer (LTT) has gained acceptance for the treatment of posterosuperior tears, particularly with external rotation weakness and lag signs. The LTT is biomechanically superior to the latissimus dorsi transfer, offering a more native vector of pull and in-phase activation. LTT could be indicated for younger patients with massive cuff tears. However, LTT is relatively contraindicated in patients with cuff tear arthropathy; combined loss of elevation and external rotation; irreparable subscapularis tear; teres minor involvement; and/or those of advanced age or unable to comply with rigid rehabilitation guidelines.