Retrospective Exploration of Botulinum Toxin Injection for Pharyngoesophageal Segment Dysfunction Post-laryngectomy.

Objective: To assess our institution's experience with botulinum toxin A injection management of pharyngoesophageal (PE) segment dysfunction after laryngectomy in tracheoesophageal voice and swallowing restoration

Study Design: A retrospective review of 43 patients who had Botox as treatment for PE dysfunction.

Setting: Tertiary academic center with fellowship-trained otolaryngologists.

Methods: Pre- and post-injection outcomes were evaluated using chart review, and the severity of symptoms was recorded based on the subjective assessment by the patient, speech language pathologists, and the treating surgeon.

Results: Forty-three patients were treated for PE dysfunction with botulinum toxin A injection. Most patients were male (n = 35, 81.4%), underwent primary cricopharnygeal myotomy (n = 36, 83.7%), and 37 (86%) had both dysphagia and speech concerns. Our injection methods included percutaneous injection by videofluoroscopy (n = 19, 44.2%), transnasal esophagoscopy (17, 40.5%), electromyography (n = 3, 7%), ultrasound (n = 1, 2.3%), or in the operating room (n = 3,7%). We found that 37 (86%) patients had subjective improvement in their symptoms, with 16 (38.1%) improving in both swallow and voice. There were no significant complications, or subjective difference in speech and swallowing outcomes by method of injection.

Conclusion: Botulinum toxin A injection appears to be safe and effective for treating difficulty with speech and swallowing due to PE dysfunction after laryngectomy. Institutions should develop standard protocols for treatment and assessment.