Enhancing soft-tissue reattachment in proximal humeral endoprosthetic reconstruction.

PURPOSE To report on the use of the Ligament Advanced Reinforcement System (LARS) to enhance joint stability and functional outcome in proximal humeral endoprosthesis reconstruction. METHODS Two men and 5 women aged 16 to 66 (mean, 28) years underwent wide resection of tumour and endoprosthesis reconstruction of the proximal humerus using the LARS, as the rotator cuff and/or deltoid muscle could be preserved. The preserved muscles were reattached to anatomic positions to regain function. Shoulder range of motion and Musculoskeletal Tumour Society scores were evaluated. RESULTS The mean follow-up was 26 (range, 14-36) months. All the 7 patients were alive without disease. The mean active abduction was 77º (range, 60°-100°), and the mean active flexion was 74° (range, 50°-100°). The mean Musculoskeletal Tumour Society score was 86% (range, 80-93%). One patient had instability of the glenohumeral joint at one year. CONCLUSION The LARS may enhance soft-tissue reattachment and improve shoulder stability after proximal humeral endoprosthetic reconstruction.