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Proportion of bony cochlear nerve canal anomalies in unilateral sensorineural hearing loss in children.
Int J Pediatr Otorhinolaryngol. 2013 Apr; 77(4):530-3.IJ

Abstract

OBJECTIVE

The aim of this study was to characterize the various bony anomalies of the inner ear in patients with unilateral sensorineural hearing loss using high-resolution temporal bone computed tomography and establish the relationship between hearing and the diameter of the bony cochlear nerve canal.

METHODS

We performed a retrospective review of 51 patients (mean age 11 years, range 0-20 years, 27 boys, 24 girls) who were diagnosed with unilateral sensorineural hearing loss with an audiogram. Coronal and axial diameter of the inner ear structures, including the internal auditory canal, bony cochlear nerve canal, and each turn of the cochlea and semicircular canals, were measured with high-resolution temporal bone computed tomography. The mean values (± 2 standard deviations) were calculated and compared between sensorineural hearing loss and normal ears, and between narrow bony cochlear nerve canal and normal bony cochlear nerve canal ears. Bony cochlear nerve canal atresia/stenosis was defined as a value less than 1.4mm in axial images.

RESULTS

The diameter of the bony cochlear nerve canal was significantly smaller in sensorineural hearing loss ears than in normal ears (p<.05). Associated inner ear anomalies, such as IAC stenosis (24%), cochlear hypoplasia (7-17%), and narrow semicircular canal bony island (8%) were only observed in the narrow bony cochlear nerve canal group. This group also showed statistically significant, severe to profound hearing loss compared to the normal bony cochlear nerve canal group (p<.05, R(2)=12.8%).

CONCLUSIONS

Most (57%) of the unilateral sensorineural hearing loss ears had bony cochlear nerve canal stenosis/atresia and this group showed associated inner ear anomalies. When the diameter of the bony cochlear nerve canal was less than 1.4mm, pure tone audio averages were more than 70 dB HL in most ears.

Authors+Show Affiliations

Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Asanbyeongwon-gil 86, Songpa-gu, Seoul 138-736, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23352796

Citation

Yi, Jong Sook, et al. "Proportion of Bony Cochlear Nerve Canal Anomalies in Unilateral Sensorineural Hearing Loss in Children." International Journal of Pediatric Otorhinolaryngology, vol. 77, no. 4, 2013, pp. 530-3.
Yi JS, Lim HW, Kang BC, et al. Proportion of bony cochlear nerve canal anomalies in unilateral sensorineural hearing loss in children. Int J Pediatr Otorhinolaryngol. 2013;77(4):530-3.
Yi, J. S., Lim, H. W., Kang, B. C., Park, S. Y., Park, H. J., & Lee, K. S. (2013). Proportion of bony cochlear nerve canal anomalies in unilateral sensorineural hearing loss in children. International Journal of Pediatric Otorhinolaryngology, 77(4), 530-3. https://doi.org/10.1016/j.ijporl.2012.12.031
Yi JS, et al. Proportion of Bony Cochlear Nerve Canal Anomalies in Unilateral Sensorineural Hearing Loss in Children. Int J Pediatr Otorhinolaryngol. 2013;77(4):530-3. PubMed PMID: 23352796.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Proportion of bony cochlear nerve canal anomalies in unilateral sensorineural hearing loss in children. AU - Yi,Jong Sook, AU - Lim,Hyun Woo, AU - Kang,Byung Chul, AU - Park,Sun-Young, AU - Park,Hong Ju, AU - Lee,Kwang-Sun, Y1 - 2013/01/24/ PY - 2012/10/11/received PY - 2012/12/22/revised PY - 2012/12/24/accepted PY - 2013/1/29/entrez PY - 2013/1/29/pubmed PY - 2013/10/26/medline SP - 530 EP - 3 JF - International journal of pediatric otorhinolaryngology JO - Int J Pediatr Otorhinolaryngol VL - 77 IS - 4 N2 - OBJECTIVE: The aim of this study was to characterize the various bony anomalies of the inner ear in patients with unilateral sensorineural hearing loss using high-resolution temporal bone computed tomography and establish the relationship between hearing and the diameter of the bony cochlear nerve canal. METHODS: We performed a retrospective review of 51 patients (mean age 11 years, range 0-20 years, 27 boys, 24 girls) who were diagnosed with unilateral sensorineural hearing loss with an audiogram. Coronal and axial diameter of the inner ear structures, including the internal auditory canal, bony cochlear nerve canal, and each turn of the cochlea and semicircular canals, were measured with high-resolution temporal bone computed tomography. The mean values (± 2 standard deviations) were calculated and compared between sensorineural hearing loss and normal ears, and between narrow bony cochlear nerve canal and normal bony cochlear nerve canal ears. Bony cochlear nerve canal atresia/stenosis was defined as a value less than 1.4mm in axial images. RESULTS: The diameter of the bony cochlear nerve canal was significantly smaller in sensorineural hearing loss ears than in normal ears (p<.05). Associated inner ear anomalies, such as IAC stenosis (24%), cochlear hypoplasia (7-17%), and narrow semicircular canal bony island (8%) were only observed in the narrow bony cochlear nerve canal group. This group also showed statistically significant, severe to profound hearing loss compared to the normal bony cochlear nerve canal group (p<.05, R(2)=12.8%). CONCLUSIONS: Most (57%) of the unilateral sensorineural hearing loss ears had bony cochlear nerve canal stenosis/atresia and this group showed associated inner ear anomalies. When the diameter of the bony cochlear nerve canal was less than 1.4mm, pure tone audio averages were more than 70 dB HL in most ears. SN - 1872-8464 UR - https://www.unboundmedicine.com/medline/citation/23352796/Proportion_of_bony_cochlear_nerve_canal_anomalies_in_unilateral_sensorineural_hearing_loss_in_children_ DB - PRIME DP - Unbound Medicine ER -