Latissimus dorsi transfer for massive posterosuperior rotator cuff tears: what affects the postoperative outcome?

Background: The management of irreparable posterosuperior rotator cuff tears (IPSRCTs) in young active individuals is still a challenge. The aim of this study was to evaluate the influence of sex, surgical technique, previous surgical procedures, tear genesis, and presence of a preoperative external rotation lag sign on the functional outcome after latissimus dorsi transfer (LDT) for IPSRCTs. Methods: Retrospectively, all patients with IPSRCTs treated with LDT during a 10-year period were followed up. Preoperative evaluation included the visual analog scale (VAS) score, range of motion, and the Constant score (CS). Postoperatively, the VAS score, range of motion, CS, American Shoulder and Elbow Surgeons score, and Subjective Shoulder Value were recorded. Preoperative and postoperative radiologic evaluation was performed using the Ramada-Fukuda classification and the acromiohumeral interval. Results: In total, 67 of 79 patients (85%), with a mean age of 63 years, were available for follow-up at 54 +/- 28 months. The CS improved from 24 +/- 6 points preoperatively to 68 +/- 17 points at follow-up (P < .001). Active flexion increased from 83 degrees +/- 47 degrees to 144 degrees +/- 35 degrees; abduction, from 69 degrees +/- 33 degrees to 134 degrees +/- 42 degrees; and external rotation, from 24 degrees +/- 18 degrees to 35 degrees +/- 21 degrees. Postoperatively, the Subjective Shoulder Value was 69% 19% and the American Shoulder and Elbow Surgeons score was 76 +/- 21. The VAS score decreased from 6.3 +/- 1.1 to 1.8 +/- 2 (P < .001). Abduction strength increased from 0.4 +/- 0.4 kg to 3.6 +/- 2.2 kg (P < .001). The acromiohumeral interval decreased from 7.9 +/- 2.6 mm to 5.1 +/- 2.2 mm, and arthropathy worsened from Ilamada-Fukuda stage 1.4 to stage 2.1. The rate of conversion to a reverse prosthesis was 6%. Conclusion: LDT represents a reliable and reproducible treatment option with good clinical midterm results after surgical treatment. Sex, genesis, preoperative presence of an external rotation lag sign, and previous surgical procedures do not affect the overall clinical outcome. (C) 2019 Journal of Shoulder and Elbow Surgery Board of Trustees. All rights reserved.