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Botulinum toxin injections for the treatment of neurogenic thoracic outlet syndrome: A systematic review
Tyler T. Woodworth MD, Austin Le MD, Campbell Miller MD, Aaron Conger DO, Mark A. Mahan MD, Daniel M. Cushman MD
Botulinum toxin (BTX) injections into the musculature surrounding the brachial plexus have been examined as a potential treatment for neurogenic thoracic outlet syndrome (nTOS). This systematic review identified 15 publications, of which one was a randomized controlled trial. BTX injections performed with ultrasound or electromyographic guidance, and with the inclusion of the pectoralis minor muscle, in addition to the anterior and/or middle scalenes, tended to provide greater symptom improvement and may predict response to first rib resection. Importantly, most studies were of low quality; thus, the results should be interpreted with caution. Further high-quality studies are needed to confirm these findings.