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Hemorrhage in the endolymphatic sac: a cause of hearing fluctuation in enlarged vestibular aqueduct

Authors
 Minbum Kim ; Jinna Kim ; Jae Young Choi ; Hee Nam Kim ; Un-Kyung Kim ; Won Sang Lee ; Ju Hyun Jeon ; Sang Cheol Kim ; Sung Huhn Kim 
Citation
 International Journal of Pediatric Otorhinolaryngology, Vol.75(12) : 1538~1544, 2011 
Journal Title
 International Journal of Pediatric Otorhinolaryngology 
ISSN
 0165-5876 
Issue Date
2011
Abstract
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
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/95068
DOI
10.1016/j.ijporl.2011.09.002
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Otorhinolaryngology
1. 연구논문 > 1. College of Medicine > Dept. of Radiology
Yonsei Authors
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Link
 http://www.sciencedirect.com/science/article/pii/S0165587611004368
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