The Journal of International
Advanced Otology
Case Report

A Message from a Narrowed Internal Auditory Canal in a Patient with a Hyperpneumatized Petrous Bone

1.

Department of Audiology and Otoneurological Evaluation – Lyon University Hospital, Lyon, France

2.

Claude Bernard Lyon 1 University, Lyon, France

3.

Paris Hearing Institute, Institut Pasteur, Paris, France

4.

Department of Radiology, Lyon University Hospital, Lyon, France

J Int Adv Otol 2020; 16: 485-488
DOI: 10.5152/iao.2020.8554
Read: 45 Downloads: 21 Published: 16 October 2020

Hyperpneumatization of the temporal bone (HPTB) is a rare finding, and its clinical impact is poorly described in literature. We report the case of a 34-year-old woman with no previous otologic condition, complaining of paroxysmal vertigo and right pulsatile tinnitus shortly after a first scuba diving session. Clinical neurotologic assessment found a right vestibular impairment. Cranial tomodensitometry showed a bilateral hyperpneumatization of the petrosal air cell system. Brain magnetic resonance imaging to rule out any retrocochlear pathology was normal, although the cochleo-vestibular nerve (CVN) appeared to be over lengthened in a narrowed internal auditory canal (IAC), especially on the right-hand side. Pain was alleviated by administration of a low-dose anti-epileptic drug. The clinical, neurological, and radiological findings evoked a right vestibulopathy generated by a limited compression of the CVN; HPTB appeared to contribute to the narrowing of the IAC, especially on the right-hand side.

Cite this article as: Reynard P, Ionescu E, Ltaief-Boudrigua A, Thai-Van H. A Message from a Narrowed Internal Auditory Canal in a Patient with a Hyperpneumatized Petrous Bone. J Int Adv Otol 2020; 16(3): 485-8.

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ISSN1308-7649 EISSN 2148-3817