| Hemorrhage in the endolymphatic sac: A cause of hearing fluctuation in enlarged vestibular aqueduct. | |
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MedLine Citation:
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PMID: 21963424 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Most of the patients with enlarged vestibular aqueduct (EVA) experience sudden hearing deterioration, but the exact mechanism is unclear. We analyzed magnetic resonance (MR) images and the cellular components of endolymph obtained from the endolymphatic sac in patients with EVA, in order to demonstrate the cause of sudden hearing loss. METHODS: A total of 25 patients (50 ears) with EVA, who had severe to profound hearing loss, were included in this retrospective clinical study. MR examinations were performed by a 3.0-T MR system using an 8-channel sensitivity-encoding head coil. We analyzed endolymphatic fluid harvested from the endolymphatic sac during cochlear implantations in four patients. RESULTS: The area of low signal intensity in the endolymphatic sac was observed on T2-weighted MR images for 15 of 50 ears. This area was observed more frequently in patients who experienced recent sudden hearing loss (10/12, 83%) than those with stable hearing (5/38, 13%)(Fisher's exact test, p<0.001). In addition, this area showed high signal intensity on fluid attenuated inversion recovery images. Cytologic analysis of the aspirated endolymph from the endolymphatic sac in the patients with this area revealed many erythrocytes. CONCLUSION: Our data suggests that hemorrhage in the endolymphatic sac could be a cause of sudden hearing deterioration in patients with EVA. |
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Authors:
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Minbum Kim; Jinna Kim; Sung Huhn Kim; Sang Cheol Kim; Ju Hyun Jeon; Won Sang Lee; Un-Kyung Kim; Hee Nam Kim; Jae Young Choi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-30 |
Journal Detail:
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Title: International journal of pediatric otorhinolaryngology Volume: - ISSN: 1872-8464 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-10-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003603 Medline TA: Int J Pediatr Otorhinolaryngol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Otology, Hana ENT Hospital, Seoul, South Korea. |
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