Characteristics of 629 Vestibular Schwannomas According to Preoperative Caloric Responses

Tringali, S.; Charpiot, Anne; Ould, M' Bareck; Dubreuil, C.; Ferber-Viart, C.

doi:10.1097/mao.0b013e3181cdd8b7

Cited by 32 publications

(20 citation statements)

References 12 publications

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“…Previous histopathological studies have shown that >80% of the ganglions have to be lost before a shift in PTA threshold occurs, and that the loss of ganglions affects discrimination and PTA disproportionally [29] . Contrary to our results, other studies have shown a correlation between caloric hypofunction and size [5,11,21] . An explanation for the missing correlation in our study could be the relatively small size interval of tumors of which 91% had a diameter of 11-30 mm.…”

Section: Discussioncontrasting

confidence: 99%

“…Almost all patients (98%) had a lesioned side caloric hypofunction. The mean UW of 72% corresponds to a severe hypofunction according to a previous classification [11] .…”

Section: Discussionmentioning

confidence: 95%

“…Unilateral weakness (UW) was graded as defined by Tringali et al [11] as UW <20% was considered normal, UW between 20% and 70% signified moderate hypofunction, and UW >70% implied severe hypofunction. Cervical vestibular evoked myogenic potential (c-VEMP) for test of saccular function and ocular vestibular evoked myogenic potential (o-VEMP) for test of utricular function consisted of air-conducted clicks of 100 dBnHL (decibel normal hearing level) presented consecutively to each ear (Eclipse; Interacoustics, Middelfart, Denmark).…”

Section: Methodsmentioning

confidence: 99%

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Audiovestibular Loss of Function Correlates in Vestibular Schwannomas

West¹,

Möller²,

Hansen³

et al. 2018

Int Adv Otol

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OBJECTIVES:The aim of the present study was to investigate the relationships between tumor size, hearing, and vestibular outcomes in patients with vestibular schwannomas (VSs). MATERIALS and METHODS:Adult patients (n=124) with unilateral extrameatal VS prior to surgery were included in the study. This was a retrospective cohort study of preoperative audiovestibular investigations including audiometry, discrimination test, caloric test, cervical vestibular evoked myogenic potential (c-VEMP), and ocular vestibular evoked myogenic potential (o-VEMP). RESULTS:The difference between lesioned and non-lesioned ear was significant for all audiovestibular outcomes. The mean caloric deficit was 74%. No tumor sided o-VEMPs were elicited. Caloric deficit correlated with hearing loss measured with pure tone average and discrimination score. c-VEMP deficit was significantly associated with severe hearing loss and larger tumors.CONCLUSION: The presence of VS leads to a significant deterioration of audiovestibular function in all objective measures. Caloric test and o-VEMPS are sensitive though unspecific measures of VSs. Increasing tumor size is not directly associated with hearing loss and only somewhat to vestibular deficit. However, audiovestibular findings are correlated.

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Section: Discussioncontrasting

confidence: 99%

“…Almost all patients (98%) had a lesioned side caloric hypofunction. The mean UW of 72% corresponds to a severe hypofunction according to a previous classification [11] .…”

Section: Discussionmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Audiovestibular Loss of Function Correlates in Vestibular Schwannomas

West¹,

Möller²,

Hansen³

et al. 2018

Int Adv Otol

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“…However, with increasing size the vHIT might become pathological [69][70][71]. It is controversially discussed if UW is a predictor for tumour size [70,72] or not [73]. It was shown that the VOR gain of vHIT is not correlated with the tumour size [70] but rated together with the CI there was a correlation.…”

Section: Vestibular Schwannoma (Vs)mentioning

confidence: 99%

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Rambold¹

2017

Up to Date on Meniere's Disease

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Testing the function of the semicircular canals (SCC) in vertigo and dizziness is an important step towards a diagnosis. There are different vestibular tests available: rotatory testing, bithermal caloric irrigation (CI) and the video-head-impulse test (vHIT). This chapter describes the basic methods, the current knowledge and economic aspects focused on the vHIT and CI. After a general section, common vertigo diseases are discussed with respect to the functional tests. From this chapter, it is clear that not only one method has to be applied to test vestibular function but a battery including the CI and the vHIT in three dimensions.

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“…Nuestra asociación entre prueba calórica asimétrica, >25% y un v-HIT alterado, fue de 77,7%, mayor a lo que otros autores han reportado en neuronitis vestibular (33%) 19 . En nuestro estudio el tamaño del tumor no se correlacionó con mayor alteración del v-HIT así como tampoco con mayor asimetría de la prueba calórica como ha sido descrito en otros trabajos 20 . Esto puede ser explicado por el lento crecimiento del schwanoma con deterioro crónico del sistema vestibular lo que produce una compensación vestibular a nivel central generando niveles de ganancias bajas (menores a 1) en ambos lados.…”

Section: Discussionunclassified

Evaluación del Video Head Impulse Test (V-Hit) en el diagnóstico del neurinoma del acústico

et al. 2015

Rev. Otorrinolaringol. Cir. Cabeza Cuello

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Introducción: La gran mayoría de lesiones que comprometen el conducto auditivo interno corresponden a schwannomas vestibulares (90%Resultados: Los resultados anormales de asimetría de ganancia y de sacadas correctivas fue de 13 pacientes (72%) y con hipoexcitabilidad en la prueba calórica fue de 9 pacientes (50%), con una sensibilidad de la prueba de 72% para vHIT y de 50% para la prueba calórica al compararlo con la resonancia magnética. Conclusión: El v-HIT es una herramienta complementaria a las pruebas calóricas y debe ser incluida como test diagnóstico dentro de la batería de exámenes para evaluar el sistema vestibular en forma completa mediante un vestibulograma.Palabras clave : Schwannomas, v-HIT, vestibulograma. ABSTRACT Introduction: The majority of injuries involving the internal auditory canal correspond to vestibular schwannomas (90%). Within the new diagnostic tests for the vestibular system appears the Head Impulse test and the video head impulse test (v-HIT)which allows the studying of all the semicircular canals.

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Characteristics of 629 Vestibular Schwannomas According to Preoperative Caloric Responses

Abstract: Our results suggest that caloric responses are well correlated with the studied preoperative and intraoperative factors and provide predictive factors with regard to postoperative facial palsy and hearing outcome.

Cited by 32 publications

References 12 publications

Audiovestibular Loss of Function Correlates in Vestibular Schwannomas

Audiovestibular Loss of Function Correlates in Vestibular Schwannomas

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Evaluación del Video Head Impulse Test (V-Hit) en el diagnóstico del neurinoma del acústico

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