Sensorineural hearing loss in patients with vestibular schwannoma correlates with the presence of utricular hydrops as diagnosed on heavily T2-weighted MRI - 16/02/19

Doi : 10.1016/j.diii.2019.01.006

M. Eliezer ^a,^b,^⁎ , G. Poillon ^a, C. Maquet ^c, A. Gillibert ^d, J. Horion ^a, J.-P. Marie ^c, J.-P. Guichard ^b, N. Magne ^a, A. Attyé ^a,^e
^a Department of Neuroradiology, Rouen University Hospital, 76000 Rouen, France
^b Department of Neuroradiology, Hôpital Lariboisière, 75010 Paris, France
^c Department of Head And Neck Surgery, Rouen University Hospital, 76000 Rouen, France
^d Department of Biostatistics, Rouen University Hospital, 76000 Rouen, France
^e Department of Neuroradiology and MRI, Grenoble Alpes University Hospital, SFR RMN neurosciences, 38000 Grenoble, France

^⁎Corresponding author at: Department of neuroradiology, hôpital Lariboisière, 75010 Paris, France.Department of neuroradiology, hôpital LariboisièreParis75010France

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Abstract

Purpose

The purpose of this study was to assess whether the volume of the vestibular endolymphatic space correlates with the degree of hearing loss using heavily T2-weighted fast imaging employing steady-state acquisition with cycle phase (FIESTA-C) MRI.

Materials and methods

A total of 23 patients with vestibular schwannoma, as diagnosed on typical image findings, who underwent FIESTA-C MRI were included. There were 13 women and 10 men with a mean age of 63.5±9.3 (SD) years (range: 49–88years). Two radiologists independently evaluated the volume of the utricle and saccule. Correlation between tumor volume, vestibular endolymphatic space volume and degree of hearing loss – as evaluated with the levels of pure-tone average and speech recognition threshold – were searched for.

Results

The mean saccular, utricular and tumor volumes were 3.17±1.1 (SD) mm³ (range: 1.45–5.7mm³), 14.55±5 (SD) mm³; (range: 6.6–23.9mm³) and 17.4±5.5 (SD) mm³; (range: 8.3–25.4mm³), respectively. There was a moderate correlation between the volume of the utricle and the degree of hearing loss as evaluated with the levels of pure-tone average (rho=0.5; P=0.015) and speech recognition threshold (rho=0.58; P=0.004). There were no significant correlations between saccular and tumor volumes and the degree of hearing loss.