Inner Ear Anomalies among Cochlear Implant Candidates in Erbil City, Iraq

Inas Duraid  Nuradeen; Saeed Nadhim  Younis

doi:10.56056/amj.2022.162

Authors

Inas Duraid Nuradeen M.B.Ch.B., Rizgary Teaching Hospital, Radiology Department, Erbil, Iraq
Saeed Nadhim Younis M.B.Ch.B. – Ph.D , Kurdistan Board of Medical Specialties, Erbil, Iraq

DOI:

https://doi.org/10.56056/amj.2022.162

Keywords:

Inner ear anomaly, cochlear implant, Mondini deformity

Abstract

Background and objective: To study the frequency of each type of inner ear abnormalities in cochlear implant candidates in Erbil city, Iraq.

Methods: This is a case series study of high resolution computed tomography and magnetic resonance images of temporal bone in 111 candidates for cochlear implantation in Erbil city between June 2015 and December 2017; who had congenital bilateral profound hearing loss.

Results: In total, 111 cases of congenital sensorineural hearing loss were included. Of these, 101 patients had a normal inner ear pattern. Ten patients identified to have inner ear anomalies (9%). unilateral anomaly seen in one child, so the total number of ears with inner ear anomalies was 19. Among these 19 abnormal ears, 7 were classified as incomplete partition type II (36.8%), 4 as incomplete partition type I (21.1%), 4 as a common cavity (21.1%), 2 as cochlear aplasia (10.5%), 1 as cochlear hypoplasia (5.3%) and 1 as Michel deformity (5.3%).

Conclusions: The most common type of anomaly was incomplete partition type II “Mondini” deformity followed by common cavity and incomplete partition type I deformities. The incidence of congenital hearing loss with inner ear anomalies is similar to the results of such studies worldwide.

Downloads

References

Pooja VD, Shaileshkumar GS, Deepak VD et al . High-resolution computerized tomography and Magnetic Resonance Imaging (MRI) in preoperative evaluation of cochlear implant patients. Adv Arab Acad Audiovestibul J. 2015;2(1):1–4

Gupta SS, Maheshwari SR, Kirtane MV, Shrivastav N. Pictorial review of MRI/CT scan in congenital temporal bone anomalies, in patients for cochlear implant. Indian J Radiol Imaging 2009;19(2):99–106

Wu WJ, He XB, Tan LH, et al. Imaging assessment of profound sensorineural deafness with inner ear anatomical abnormalities. J Otol 2015; 10(1):29–38. doi: 10.1016/j.joto.2015.07.005

Ahmad RL, Lokman S. Cochlear implantation in congenital cochlear abnormalities. Med J Malaysia. 2005; 60(3):379–82

Sennaro?lu L, Bajin MD. Classification and current management of inner ear malformations. Balkan Med J 2017;34(5):397–411

Digge P, Solanki RN, Shah DC, Vishwakarma R, Kumar S. Imaging modality of choice for pre-operative cochlear imaging: HRCT vs. MRI temporal bone. J Clin Diagn Res 2016;10(10):TC01–TC04

Huang BY, Zdanski C, Castillo M. Pediatric sensorineural hearing loss, Part 1: Practical aspects for neuroradiologists. Am J Neuroradiol 2012; 33(2):211–7

Aldhafeeri AM, Alsanosi AA. Prevalence of inner ear anomalies among cochlear implant candidates. Saudi Med J. 2016;37(10):1096–100. doi: 10.15537/smj.2016.10.15025

Buchman CA, Copeland BJ, Yu KK, Brown CJ, Carrasco VN, Pillsbury HC. Cochlear implantation in children with congenital inner ear malformations. Laryngoscope 2004; 114(2):309–16

Sennaroglu L. Cochlear implantation in inner ear malformations – a review article. Cochlear Implants Int. 2010;11(1):4–41. doi: 10.1002/cii.416.

Jackler RK, Luxford WM, House WF. Congenital malformations of the inner ear: a classification based on embryogenesis. Laryngoscope 1987;97(3 Pt 2 Suppl 40):2–14

Daneshi A, Farhadi M, Ajalloueyan M, et al. Cochlear implantation in children with inner ear malformation: A multicenter study on auditory performance and speech production outcomes. Int J Pediatr Otorhinolaryngol. 2020; 22:132.

Ozgen B, Oguz KK, Atas A, Sennaroglu L. Complete labyrinthine aplasia: Clinical and radiologic findings with review of the literature. Am J Neuroradiol 2009;30(4):774–80

Jackler R, De La Cruz A. The large vestibular aqueduct syndrome. Laryngoscope. 1989; 99:1238–43.

Lemmerling MM, Mancuso AA, Antonelli PJ, Kubilis PS. Normal modiolus: CT appearance in patients with a large vestibular aqueduct. Radiology 1997; 204:213–9.