A Case with the Bilateral Narrow Bony Cochlear Nerve Canals Associated with Near Normal Hearing Thresholds.
10.7874/kja.2012.16.3.141
- Author:
Jae Cheul AHN
1
;
Shin Hye KIM
;
Byung Yoon CHOI
Author Information
1. Department of Otorhinolaryngology-Head & Neck Surgery, Seoul National University Hospital, Seoul, Korea.
- Publication Type:Case Report
- Keywords:
Cochlear nerve;
Multidetector computed tomography;
Sensorineural hearing loss;
Magnetic resonance imaging
- MeSH:
Acoustics;
Brain Stem;
Cochlear Nerve;
Hearing;
Hearing Loss;
Hearing Loss, Sensorineural;
Humans;
Magnetic Resonance Imaging;
Multidetector Computed Tomography;
Temporal Bone
- From:Korean Journal of Audiology
2012;16(3):141-144
- CountryRepublic of Korea
- Language:English
-
Abstract:
The narrow bony cochlear nerve canal in high resolution temporal bone computed tomography is frequently found in patients of congenital sensorineural hearing loss. But this bony structural anomaly could not conclude the functional outcome of cochlear nerve. Here, we present a case of a 14-month-old girl having bilateral narrow bony cochlear nerve canals. In magnetic resonance imaging, both the cochlear nerves were identified to be intact. Moreover, acoustic brainstem response threshold and auditory steady state response revealed nearly normal hearing thresholds. Therefore, we suggest that the narrow bony cochlear nerve canal itself does not necessarily indicate a substantial degree of hearing loss.
