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Delayed recovery of speech discrimination after fractionated stereotactic radiotherapy for vestibular schwannoma in neurofibromatosis 2

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February 12, 2014
by Michael Hoa, MD; Eric P. Wilkinson, MD; and William H. Slattery III, MD


Hearing loss commonly occurs after radiation therapy for an acoustic neuroma, and it is highly unusual for hearing to return after a prolonged period of time. We report the case of a 12-year-old boy with neurofibromatosis 2 who underwent fractionated stereotactic radiotherapy for the treatment of a left-sided vestibular schwannoma. Following treatment, he demonstrated an elevation of pure-tone audiometric thresholds and a sudden decrease in speech discrimination score (SDS) to 0%. However, 20 months postoperatively, his SDS suddenly and spontaneously rose to 92%, although there was no improvement in his speech reception threshold. We discuss the possible reasons for the unusual outcome in this patient.

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