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Bilateral Dilatation of the Internal Auditory Canal without Acoustic Neurinoma Sawako Masuda 1 1Department of Otorhinolaryngology, Faculty of Medicine, Mie University pp.680-683
Published Date 1995/7/20
DOI https://doi.org/10.11477/mf.1411901178
  • Abstract
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We report a rare case of so-called “patulous canal”, which is characterized by bilateral dilata-tion of the internal auditory canal and hearing impairment. A 26-year-old male had bilateral sen-sorineural hearing loss with recruitment phenome-non and normal vestibular function. The maximum diameter of the internal canal was 14 mm, bilateral-ly. MRI revealed the canals as the same intensity of the cerebrospinal fluid. They were not enhanced by Gd-DTPA and the presence of tumor was denied.


Copyright © 1995, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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