内耳和前庭神经的扩张:什么机制?

R.E. Kania , P. Herman , J.-P. Guichard , P. Tran Ba Huy
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引用次数: 0

摘要

目的:介绍一例与同侧椎管内前庭神经鞘瘤(VS)无明显接触的单侧内耳道(IAC)增宽的独特病例,并提出该内耳道增宽的原因问题。方法回顾1例单侧IAC增大患者的病历和影像学资料,诊断为不能解释扩张的小管内VS。结果患者单侧IAC扩张,与同侧VS不匹配。因此,该病例引发了关于IAC的这种扩张是先天不对称的还是IAC扩大所涉及的机制的结果的讨论。结论:虽然IAC的不对称是目前的观点,但本病例证明了相反的观点,即施加在IAC壁上的压力增加并不是这种增宽的唯一机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dilatation du méat acoustique interne et schwannome vestibulaire intracanalaire : quels mécanismes ?

Objectives

To present a unique case of unilateral widening of the internal auditory canal (IAC) with no significant contact with an ipsilateral intracanalicular vestibular schwannoma (VS), raising the issue of the cause(s) of this IAC widening.

Methods

The medical record and radiologic data were reviewed of a patient presenting an enlarged unilateral IAC, which led to the diagnosis of an intracanalicular VS that could not account for the dilation.

Results

The patient had a unilateral dilation of the IAC that did not match the ipsilateral VS he had. As a result, this case motivated discussion of whether such dilation of the IAC was congenitally asymmetrical or the result of the mechanisms involved in the widening of the IAC.

Conclusions

Although asymmetry of IAC is a current notion, this case demonstrates a contrario that increased pressure exerted on the walls of the IAC cannot be the only mechanism in such widening.

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