Duplicated internal auditory canal with inner ear malformation: Case report and literature review

Yoshitaka Takanashi; Tetsuaki Kawase; Yasuko Tatewaki; Jun Suzuki; Izumi Yahata; Yuuri Nomura; Kazuha Oda; Hiromitsu Miyazaki; Yukio Katori

doi:10.1016/j.anl.2017.03.019

Duplicated internal auditory canal with inner ear malformation: Case report and literature review

Auris Nasus Larynx. 2018 Apr;45(2):351-357. doi: 10.1016/j.anl.2017.03.019. Epub 2017 Apr 23.

Authors

Yoshitaka Takanashi¹, Tetsuaki Kawase², Yasuko Tatewaki³, Jun Suzuki⁴, Izumi Yahata⁴, Yuuri Nomura⁴, Kazuha Oda⁴, Hiromitsu Miyazaki⁴, Yukio Katori⁴

Affiliations

¹ Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan. Electronic address: y-takanashi@mti.biglobe.ne.jp.
² Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan; Laboratory of Rehabilitative Auditory Science, Tohoku University Graduate School of Biomedical Engineering, 6-6 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
³ Department of Radiology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan.
⁴ Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.

PMID: 28446373
DOI: 10.1016/j.anl.2017.03.019

Abstract

Internal auditory canal anomalies are rare. Narrow internal auditory canal is believed to occur as a result of aplasia or hypoplasia of the vestibulocochlear nerve. Narrow duplication of the internal auditory canal is considered to be very rare. Narrow duplication of the internal auditory canal with inner ear malformation has been reported in only 3 cases. We present 2 cases of narrow duplication of the internal auditory canal with inner ear malformation. The first case had inner ear malformation on only one side and the second case had inner ear malformation on both sides. The embryogenesis may be different between internal auditory canal and inner ear.

Keywords: 3D-CT; Duplicated IAC; Inner ear malformation.

Publication types

Case Reports
Review

MeSH terms

Audiometry, Pure-Tone
Child
Cochlea / abnormalities
Cochlea / diagnostic imaging
Ear, Inner / abnormalities*
Ear, Inner / diagnostic imaging
Evoked Potentials, Auditory, Brain Stem
Female
Hearing Loss, Bilateral / congenital
Hearing Loss, Bilateral / diagnostic imaging*
Hearing Loss, Bilateral / physiopathology
Hearing Loss, Unilateral / congenital
Hearing Loss, Unilateral / diagnostic imaging*
Hearing Loss, Unilateral / physiopathology
Humans
Imaging, Three-Dimensional
Infant
Magnetic Resonance Imaging
Male
Otoacoustic Emissions, Spontaneous
Semicircular Canals / abnormalities
Semicircular Canals / diagnostic imaging
Temporal Bone / abnormalities
Temporal Bone / diagnostic imaging
Tomography, X-Ray Computed
Vestibule, Labyrinth / abnormalities
Vestibule, Labyrinth / diagnostic imaging