Evaluation of Cochlear Nerve Scale with MRI in Patients with Idiopathic Unilateral Sensorineural Hearing Loss

Year 2019, Volume: 9 Issue: 4, 639 - 643, 16.12.2019

Onur Taydaş , Hakkı Caner İnan

https://doi.org/10.31832/smj.593933

Abstract

Objective:
The aim of this study was to evaluate the cochlear nerve diameter in patients
with unilateral sensorineural hearing loss and to compare the diameter of the
normal side with the hearing loss side.

Materials and Methods:
A total of 36 patients with idiopathic unilateral sensorineural hearing loss
were included in the study. Magnetic resonance imaging (MRI) and audiogram were
performed on all the patients. Both cochlear nerve diameters were measured on
axial thin-section constructive interference in steady state (CISS) sequences.

Results:
The patients comprised 16 males and 20 females with a mean age of 52.3±13.7
years. Hearing loss was in the right ear in 11 patients, and in the left ear in
25. The average cochlear nerve diameter on the side with hearing loss was 0.13
cm while it was 0.19 cm on the normal side. There was a statistically
significant difference between the two sides (p < 0.001).

Conclusion: In patients with
unilateral sensorineural hearing loss, MRI allows the assessment of the
cochlear nerve with anatomic detail, and enables the exclusion of possible
organic pathologies. Demonstration of decreased cochlear nerve diameter in
idiopathic sensorineural hearing loss will contribute to elucidating the
etiology of this disease in the future.

Keywords

cochlear nerve, sensorineural hearing loss, magnetic resonance imaging

İdiyopatik Tek Taraflı Sensörinöral İşitme Kayıplı Hastalarda Kohlear Sinir Çapının Manyetik Rezonans Görüntüleme ile Değerlendirilmesi

Abstract

Amaç: Bu çalışmanın amacı, tek taraflı idiyopatik sensörinöral
işitme kaybı bulunan hastalarda kohlear sinir çapını değerlendirmek ve normal
taraf ile işitme kaybı bulunan tarafın çaplarını karşılaştırmaktır.

Gereç ve Yöntem: Tek taraflı idiyopatik sensörinöral işitme kaybı bulunan
toplam 36 hasta çalışmaya dahil edildi. Tüm hastalara manyetik rezonans
görüntüleme (MRG) ve saf ses odyometrisi uygulandı. Her iki taraftaki kohlear
sinir çapları ince kesit aksiyal “constructive interference in steady state
(CISS)” sekansından ölçüldü.

Bulgular: Hastaların 16’sı erkek 20’si kadındı ve yaş ortalamaları
52.3±13.7 idi. 11 hastada sağ tarafta, 25 hastada ise sol tarafta işitme kaybı
vardı. Ortalama kohlear sinir çapı işitme kaybı olan tarafta 0,13 cm iken normal
tarafta 0,19 cm idi. İki taraf arasında anlamlı farklılık mevcuttu (p <
0.001).

Sonuç: Tek taraflı sensörinöral işitme kaybı bulunan
hastalarda MRG kohlear sinirin anatomik detaylarla incelenmesine olanak sağlar
ve olası organik patolojilerin dışlanmasına yardımcı olur. Tek taraflı
idiyopatik sensörinöral işitme kaybında kohlear sinir çapının daha az olduğunun
gösterilmesi gelecekte hastalığın etiyolojisinin aydınlatılmasına katkı
sağlayacaktır.

Keywords

kohlear sinir, sensörinöral işitme kaybı, manyetik rezonans görüntüleme

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