Impact of Cochlear Dose on Hearing Preservation Following Stereotactic Radiosurgery in Treatment of Vestibular Schwannomas: A Multi-Center Study

Stereotactic radiosurgery (SRS) is a well-established treatment for vestibular schwannomas (VS). Hearing loss remains a main morbidity of VS and its treatments, including SRS. The effects of radiation parameters of SRS on hearing remain unknown. The goal of this study is to determine the effect of t...

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Veröffentlicht in:World neurosurgery 2023-10, Vol.178, p.e24-e33
Hauptverfasser: Chang, Steven D., Muacevic, Alexander, Klein, Andrea L., Sherman, Jonathan H., Romanelli, Pantaleo, Santa Maria, Peter L., Fuerweger, Christoph, Bossi Zanetti, Isa, Beltramo, Giancarlo, Vaisbush, Yona, Tran, Emma, Feng, Austin, Teng, Hao, Meola, Antonio, Gibbs, Iris, Tolisano, Antony M., Kutz, Joe Walter, Wardak, Zabi, Nedzi, Lucien A., Hong, Robert, MacRae, Don, Sohal, Preet, Kapoor, Elina, Sabet-Rasekh, Parisa, Maghami, Sam, Moncada, Paola X., Zaleski-King, Ashley, Amdur, Richard, Monfared, Ashkan
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container_issue
container_start_page e24
container_title World neurosurgery
container_volume 178
creator Chang, Steven D.
Muacevic, Alexander
Klein, Andrea L.
Sherman, Jonathan H.
Romanelli, Pantaleo
Santa Maria, Peter L.
Fuerweger, Christoph
Bossi Zanetti, Isa
Beltramo, Giancarlo
Vaisbush, Yona
Tran, Emma
Feng, Austin
Teng, Hao
Meola, Antonio
Gibbs, Iris
Tolisano, Antony M.
Kutz, Joe Walter
Wardak, Zabi
Nedzi, Lucien A.
Hong, Robert
MacRae, Don
Sohal, Preet
Kapoor, Elina
Sabet-Rasekh, Parisa
Maghami, Sam
Moncada, Paola X.
Zaleski-King, Ashley
Amdur, Richard
Monfared, Ashkan
description Stereotactic radiosurgery (SRS) is a well-established treatment for vestibular schwannomas (VS). Hearing loss remains a main morbidity of VS and its treatments, including SRS. The effects of radiation parameters of SRS on hearing remain unknown. The goal of this study is to determine the effect of tumor volume, patient demographics, pretreatment hearing status, cochlear radiation dose, total tumor radiation dose, fractionation, and other radiotherapy parameters on hearing deterioration. Multicenter retrospective analysis of 611 patients who underwent SRS for VS from 1990–2020 and had pre- and post-treatment audiograms. Pure tone averages (PTAs) increased and word recognition scores (WRSs) decreased in treated ears at 12–60 months while remaining stable in untreated ears. Higher baseline PTA, higher tumor radiation dose, higher maximum cochlear dose, and usage of single fraction resulted in higher post radiation PTA; WRS was only predicted by baseline WRS and age. Higher baseline PTA, single fraction treatment, higher tumor radiation dose, and higher maximum cochlear dose resulted in a faster deterioration in PTA. Below a maximum cochlear dose of 3 Gy, there were no statistically significant changes in PTA or WRS. Decline of hearing at one year in VS patients after SRS is directly related to maximum cochlear dose, single versus 3-fraction treatment, total tumor radiation dose, and baseline hearing level. The maximum safe cochlear dose for hearingtbrowd preservation at one year is 3 Gy, and the use of 3 fractions instead of one fraction was better at preserving hearing.
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subjects Follow-Up Studies
Fractionation
Hearing
Hearing preservation
Humans
Neuroma, Acoustic - radiotherapy
Neuroma, Acoustic - surgery
Radiation dose
Radiosurgery - adverse effects
Radiosurgery - methods
Retrospective Studies
Stereotactic radiosurgery
Treatment Outcome
Vestibular schwannoma
title Impact of Cochlear Dose on Hearing Preservation Following Stereotactic Radiosurgery in Treatment of Vestibular Schwannomas: A Multi-Center Study
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