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New Imaging Findings of Incomplete Partition Type III Inner Ear Malformation and Literature Review

New Imaging Findings of Incomplete Partition Type III Inner Ear Malformation and Literature Review CLINICAL REPORT HEAD & NECK New Imaging Findings of Incomplete Partition Type III Inner Ear Malformation and Literature Review R. Hong, Q. Du, and Y. Pan ABSTRACT SUMMARY: Incomplete partition type III, also referred to as X-linked deafness, is a rare genetic inner ear malformation. Its charac- teristic CT findings, including bulbous dilation of the internal auditory canal and absence of the modiolus with the interscalar septa present, have been well-recognized. In this series of 19 cases, we report the abnormalities of the vestibule and semicircular canals and provide a comprehensive description of their CT and MR imaging findings. The inner ear malformations in incomplete partition type III were bilateral and basically symmetric, with involvement of the internal auditory canal, nerve canals in the fundus, cochlea, vestibule, semicircular canals, vestibular aqueduct, otic capsule, round window, oval window, and stapes. An irregular vestibule with a cystic appearance is also a distinctive imaging feature, which could be seen in about 90% of our patients, with a cystic appear- ance of the semicircular canals present in nearly half of the cases. ABBREVIATIONS: CN ¼ cochlear nerve; DFNX2 ¼ X-linked deafness type 2; IAC ¼ internal auditory canal; IP-III ¼ incomplete partition type http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Neuroradiology American Journal of Neuroradiology

New Imaging Findings of Incomplete Partition Type III Inner Ear Malformation and Literature Review

American Journal of Neuroradiology , Volume 41 (6) – Jun 1, 2020

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References (17)

Publisher
American Journal of Neuroradiology
Copyright
© 2020 by American Journal of Neuroradiology
ISSN
0195-6108
eISSN
1936-959X
DOI
10.3174/ajnr.A6576
Publisher site
See Article on Publisher Site

Abstract

CLINICAL REPORT HEAD & NECK New Imaging Findings of Incomplete Partition Type III Inner Ear Malformation and Literature Review R. Hong, Q. Du, and Y. Pan ABSTRACT SUMMARY: Incomplete partition type III, also referred to as X-linked deafness, is a rare genetic inner ear malformation. Its charac- teristic CT findings, including bulbous dilation of the internal auditory canal and absence of the modiolus with the interscalar septa present, have been well-recognized. In this series of 19 cases, we report the abnormalities of the vestibule and semicircular canals and provide a comprehensive description of their CT and MR imaging findings. The inner ear malformations in incomplete partition type III were bilateral and basically symmetric, with involvement of the internal auditory canal, nerve canals in the fundus, cochlea, vestibule, semicircular canals, vestibular aqueduct, otic capsule, round window, oval window, and stapes. An irregular vestibule with a cystic appearance is also a distinctive imaging feature, which could be seen in about 90% of our patients, with a cystic appear- ance of the semicircular canals present in nearly half of the cases. ABBREVIATIONS: CN ¼ cochlear nerve; DFNX2 ¼ X-linked deafness type 2; IAC ¼ internal auditory canal; IP-III ¼ incomplete partition type

Journal

American Journal of NeuroradiologyAmerican Journal of Neuroradiology

Published: Jun 1, 2020

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