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DOI: 10.1055/s-2007-1032263
Successful treatment of autophonia with botulinum toxin: a case report
Objectives: To treat an autophonia due to a patulous eustachian tube (PET) using botulinum toxin.
Patient and Methods: Assuming PET was caused by abnormal activity of paratubal muscles (tensor and levator veli palatini muscle and salpingopharyngeus muscle), paralysis was performed via botulinum toxin (BT) type A injections in a female professional musician, 45 years old with chronic unilateral autophonia for 20 years.
In addition to a patient interview, an endoscopic examination of the nasopharynx (postrhinoscopy), ear microscopy and impedance audiometry were performed to verify the diagnosis and the outcome after treatment.
Results: The autophonia disappeared 1 week after treatment. A normalized tympanic ventilation was verified by impedance audiometry after 8 weeks. The period of symptom relief was 9 months.
Conclusions: The administration of BT type A provides a new option in the treatment of PET. The reliability of this method and the effect of repeated injections remains to be proved in future studies.