![]() In this article, we will discuss our approach to assessment of the IAC in patients with retrocochlear SNHL or vestibular symptoms of central origin, review the pathological processes involving the IAC walls or arising within the canal, emphasizing the appropriate MRI sequences used for diagnosis. Auditory brain stem response has been widely used as a screening procedure, but this test fails to recognize small lesions and cannot be used whenever hearing loss is severe. Unfortunately, the high cost of MR has been a limiting factor in its use as a screening test for patients with sensorineural hearing loss (SNHL) of unknown origin. The possibility of demonstrating masses as small as 2 mm has propelled MRI into the leading role for diagnosis of vestibular schwannoma. Pathological processes arising within the IAC are well visualized by various MR sequences. Other names for acoustic neuroma or vestibular schwannoma include acoustic schwannoma, vestibular neuroma, auditory neuroma and inner ear tumor. Treatment can include observation (watching and waiting), surgery or radiation. MRI provides excellent assessment of the IAC and the bony changes occurring in the canal walls, and it provides excellent demonstration of the content of the canal. Acoustic neuroma is diagnosed using a hearing test (audiogram) and imaging (MRI). without special acknowledgement does not imply that such names, as defined by the relevant protection laws, be regarded as unprotected, and, thus, free for general use.Īuthors who publish with this journal agree to the following terms:Īuthors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Īuthors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Īuthors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).Magnetic resonance imaging (MRI) is presently the study of choice for assessment of the internal auditory canal (IAC). The use, in this journal, of registered trade names, trade marks, etc. By submitting a manuscript, the authors(s) agree that copyrights for their articles are automatically transferred to Bangladesh Journal of Otorhinolaryngology, if and when the articles are accepted for publication. Accepted papers become the permanent property of the Bangladesh Journal of Otorhinolaryngology. Manuscripts submitted for publication in the Bangladesh Journal of Otorhinolaryngology must not have been previously submitted or published. It was managed by facial nerve decompression by translabyrinthine approach in an attempt to prevent further deterioration of facial palsy.īangladesh J Otorhinolaryngol 2012 18(2): 179-182 Magnetic resonance imaging (MRI) has been accepted as a sensitive imaging method to identify lesions in the cerebellopontine angle (CPA), internal auditory canal (IAC), and inner ear in patients with SSNHL. The diameter of the IAC was less than 2 mm on high resolution temporal bone computed tomography (HRCT) scan. Here is presentation of a case of unilateral (left) IAC stenosis with profound hearing loss and progressive House Brackmann Grade III-IV facial weakness. High resolution temporal bone CT-scan and magnetic resonance imaging (MRI) are the important tools for diagnosis. Patient may present with symptoms of progressive facial nerve palsy, hearing loss, tinnitus and giddiness. Internal auditory canal (IAC) stenosis is a rare cause of sensorineural hearing loss. Internal auditory canal stenosis, facial nerve decompression Abstract 1, 1stĬross Street, Off 2nd Main Road, Raja Annamalai Puram, Chennai, Tamil Nadu
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