Computed tomographic features of the bony canal of the cochlear nerve in pediatric patients with unilateral sensorineural hearing loss

Kono, Tatsuo

doi:10.1007/s11604-007-0204-9

Cited by 40 publications

(58 citation statements)

References 21 publications

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“…Previously, BCNC length and width ranged from 0.93-1.17 mm and from 1.88-2.13 mm, respectively, in normal hearing inner ears ( table 5 ) [Fatterpekar et al, 2000;Komatsubara et al, 2007;Kono, 2008]. In this study, BCNC length and width in normal inner ears measured 1.07 and 2.38 mm, respectively.…”

Section: Discussionsupporting

confidence: 52%

“…To the best of our knowledge, our study encompasses the largest data in terms of BCNC length and width. Presently, BCNC length and width in the affected inner ears (group C) of congenital USNHL were significantly smaller than those of normal hearing inner ears (group A), while previous publications reported the same tendency in terms of width [Komatsubara et al, 2007;Kono, 2008]. The width in the affected inner ears in our study measured 1.58 mm, whereas it was previously reported to be 1.12 and 1.0 mm [Komatsubara et al, 2007;Kono, 2008].…”

Section: --------Diagonal Linementioning

confidence: 57%

“…For instance, 56 diseased ears with various etiologies were included as control in one study [Komatsubara et al, 2007] and the contralateral inner ears of congenital USNHL were regarded as control in another study [Kono, 2008]. In contrast, in our study, there was a control group of completely unaffected patients, as well as a group of contralateral inner ears of congenital USNHL.…”

Section: --------Diagonal Linementioning

confidence: 83%

“…This structure had not drawn significant attention prior to the measurement of the width and length of the BCNC in normal hearing inner ears in 1999 [Fatterpekar et al, 1999]. Since then, the dimensions of BCNC in normal hearing and in congenital bilateral/unilateral SNHL inner ears have been investigated [Fatterpekar et al, 2000;Sennaroglu and Saatci, 2004;Adunka et al, 2007;Komatsubara et al, 2007;Kono, 2008;Laury et al, 2009]. However, there have been few reports on the prevalence of BCNC hypoplasia in congenital USNHL and how this could relate to hearing loss.…”

Section: Introductionmentioning

confidence: 99%

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Implication of Bony Cochlear Nerve Canal on Hearing in Patients with Congenital Unilateral Sensorineural Hearing Loss

Jang

Kim²,

Yoo

et al. 2012

Audiol Neurotol

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This study was designed to evaluate the dimensions of the bony cochlear nerve canal (BCNC) in congenital unilateral sensorineural hearing loss (USNHL) patients with normal inner ears, and to analyze the correlation between BCNC and hearing status. Medical records and temporal bone computed tomography (TBCT) findings of 380 patients who visited Seoul National University Hospital between January 1999 and December 2007 were reviewed retrospectively. The length and width of the BCNC at the fundus of the internal auditory canal were measured in millimeters based on the axial view of TBCT for three ear groups: normal inner ears of control group subjects (group A, 179 ears), normal inner ears on the contralateral side of USNHL patients (group B, 201 ears), and the affected inner ears in USNHL (group C, 201 ears). The mean values of length and width in group C (0.79 ± 0.36 and 1.58 ± 0.83 mm, respectively) were significantly smaller than those in group A (1.07 ± 0.10 and 2.38 ± 0.28 mm, respectively; p < 0.001) and group B (1.04 ± 0.23 and 2.33 ± 0.39 mm, respectively; p < 0.001). The receiver operating characteristic curves for BCNC were conducted to estimate the cutoff values from which the proportions of profound hearing loss increased, compared to those of mild to severe hearing loss. The areas under the curve were 0.487 ± 0.044 (p = 0.781) and 0.622 ± 0.041 (p = 0.011) for length and width, respectively. The cutoff value of width with a sensitivity of 90% for profound USNHL was 1.16 mm in otherwise normal inner ears. Clinicians would be recommended to take a close look at BCNC as one of the possible causes of hearing loss in otherwise normal inner ears of USNHL on TBCT.

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Section: Discussionsupporting

confidence: 52%

Section: --------Diagonal Linementioning

confidence: 57%

Section: --------Diagonal Linementioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Implication of Bony Cochlear Nerve Canal on Hearing in Patients with Congenital Unilateral Sensorineural Hearing Loss

Jang

Kim²,

Yoo

et al. 2012

Audiol Neurotol

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“…The most appropriate radiological imaging option for investigating bony inner ear structures is temporal bone CT. Evidence has suggested an association between SNHL and narrowed inner ear structures, such as BCNC [7,8] . BCNC is described as a bony transition canal that is located between IAC and cochlear modiolus (Figure 4) [9] .…”

Section: Discussionmentioning

confidence: 99%

Radiological Evaluation of Inner Ear with Computed Tomography in Patients with Unilateral Non-Pulsatile Tinnitus

Ocak¹,

Kocaöz²,

Acar³

et al. 2018

Int Adv Otol

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OBJECTIVE:The objective of this research was to investigate the possible relationship between tinnitus and certain bony inner ear structures using computed tomography (CT). MATERIALS and METHODS:This was a prospective, controlled, double-blind study. The subjects of the study were divided into the following three groups: group 1 (G1), patients with unilateral sensorineural hearing loss (SNHL) and unilateral non-pulsatile tinnitus in the same ear; group 2 (G2), patients with normal hearing and unilateral non-pulsatile tinnitus; and group 3 (G3), healthy volunteers with neither tinnitus nor hearing loss. The basal turn length, internal acoustic canal (IAC) width and length, bony cochlear nerve canal (BCNC) width, and IAC diameter at the porus acousticus internus (PAI) were measured. RESULTS:The mean BCNC width was significantly narrower in G1 and G2 than in the control group (G3) (p<0.001). For patients in G2, BCNC width was significantly narrower in ears with tinnitus (p<0.001) than in ears without tinnitus. The mean IAC diameter at PAI was also narrower in the G1 patients (p=0.007) compared with the other groups. CONCLUSION:The results of this study suggest that CT evaluation of the inner ear structures is important in patients with tinnitus. According to the results, a narrow BCNC may cause phantom sensations and be related to cochlear nerve dysfunction. Therefore, it is recommended that clinicians evaluate BCNC carefully while assessing such patients.

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Frequent Association of Cochlear Nerve Canal Stenosis With Pediatric Sensorineural Hearing Loss

Wilkins¹,

Prabhu²,

Huang³

et al. 2012

Arch Otolaryngol Head Neck Surg

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Computed tomographic features of the bony canal of the cochlear nerve in pediatric patients with unilateral sensorineural hearing loss

Cited by 40 publications

References 21 publications

Implication of Bony Cochlear Nerve Canal on Hearing in Patients with Congenital Unilateral Sensorineural Hearing Loss

Implication of Bony Cochlear Nerve Canal on Hearing in Patients with Congenital Unilateral Sensorineural Hearing Loss

Radiological Evaluation of Inner Ear with Computed Tomography in Patients with Unilateral Non-Pulsatile Tinnitus

Frequent Association of Cochlear Nerve Canal Stenosis With Pediatric Sensorineural Hearing Loss

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