| A Case of Cochlear Nerve Deficiency Without Profound Sensorineural Hearing Loss. | |
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MedLine Citation:
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PMID: 21358452 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE:: To describe a case of cochlear nerve deficiency (CND) with unique otologic findings. PATIENT:: A 6-year-old girl. MAIN OUTCOME MEASURES:: Magnetic resonance imaging, pure tone audiometry, distortion product otoacoustic emissions, and auditory brainstem response. RESULTS:: The patient showed moderate sensorineural hearing impairment limited to high frequency in the right ear on pure tone audiometry. The auditory brainstem response was absent on the right; however, distortion product otoacoustic emissions were detected on both sides. The right cochlear nerve at the level of the fundus was absent on 3-dimensional constructive interference in steady state magnetic resonance imaging. CONCLUSION:: Most cases of CND show deafness or profound hearing loss, but the patient in this case had only moderate hearing loss. This finding provides evidence that auditory thresholds are variable in patients with CND. Therefore, careful evaluation is needed in diagnosis of patients with hearing loss. |
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Authors:
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Ikuyo Miyanohara; Keiichi Miyashita; Koji Takumi; Masayuki Nakajo; Yuichi Kurono |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-2-24 |
Journal Detail:
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Title: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology Volume: - ISSN: 1537-4505 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-3-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100961504 Medline TA: Otol Neurotol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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*Department of Otolaryngology-Head and Neck Surgery, Kagoshima University Graduate School of Medical and Dental Sciences; †National Sanatorium Hoshizuka Keiaien; and ‡Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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