Lópiz Morales, María YaizaRodriguez González, AlbertoMartín Albarrán, SusanaMarcelo, HectorGarcía Fernández, CarlosMarco Martínez, Fernando2024-08-202024-08-202018-02-20Lopiz Y, Rodriguez-González A, Martín-Albarrán S, Marcelo H, García-Fernández C, Marco F. Injury to the axillary and suprascapular nerves in rotator cuff arthropathy and after reverse shoulder arthroplasty: a prospective electromyographic analysis. J Shoulder Elbow Surg. 2018 Jul;27(7):1275-1282. doi: 10.1016/j.jse.2017.12.030. Epub 2018 Feb 21. PMID: 29475786.1532-650010.1016/j.jse.2017.12.030https://hdl.handle.net/20.500.14352/107517Background: Neurologic pre- and postoperative injuries to the axillary and/or suprascapular nerve (SSN) have a higher incidence than expected and may lead to significantly decreased functional outcomes and increased risk of reverse shoulder arthroplasty (RSA) failure. Methods: Patients who underwent a RSA for rotator cuff tear arthropathy (RCTA) were included from December 2014 to December 2015. This study focused on the clinical (Constant score), radiographic, and pre- and postoperative electromyographic evaluations at 3 and 6 months. Results: Twenty patients met the inclusion criteria. One was lost to follow-up. Preoperatively, 15 patients showed changes on electromyography (9 SSN and 15 axillary nerve lesions); all of them were chronic and disuse injuries. The mean preoperative relative Constant score (rCS) of all included patients was 39 ± 9 (range, 19-64). At 3 months postsurgery, the prevalence of acute injuries for both nerves was 31.5%. At 6 months postsurgery, 2 axillary nerve injuries and 6 SSN injuries remain unchanged, and the rest improved or normalized. The mean postsurgery rCS of the entire cohort at 6-month follow-up was 78 ± 6.5. Mean postoperative rCS for acute postoperative nerve injury was 71 ± 3 for the axillary nerve and 64 ± 5 for SSN. Conclusions: Axillary and SSN injuries in RCTA have a much higher incidence than expected. Most of these axillary lesions are transient, with an almost complete recovery seen on electromyography at 6 months and with scarce functional impact. However, SSN lesions appear to behave differently, with poor functional results and having a lower potential for a complete recovery.engjournal article1058-2746https://doi.org/10.1016/j.jse.2017.12.03029475786https://www.sciencedirect.com/journal/journal-of-shoulder-and-elbow-surgeryrestricted access616.7-76-089Reverse shoulder arthroplastyAxillary nerveComplicationsNeurologic injuryReverse geometrySuprascapular nerveCiencias Biomédicas32 Ciencias Médicas