Imaging evaluation of duplication of the internal auditory canal
10.16066/j.1672-7002.2024.02.005
- VernacularTitle:内听道重复畸形影像学评估
- Author:
Chunmei WU
1
;
Simeng LU
;
Shuilian YU
;
Miao LEI
;
Yongxin LI
;
Bentao YANG
Author Information
1. 广西医学科学院,广西壮族自治区人民医院放射科,广西 南宁 530021
- Keywords:
Ear,Inner;
Tomography,X-Ray Computed;
Magnetic Resonance Imaging;
internal auditory canal;
duplication of the internal auditory canal
- From:
Chinese Archives of Otolaryngology-Head and Neck Surgery
2024;31(2):92-96
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To analyze the MSCT and MRI imaging manifestations of patients with duplication of the internal auditory canal(DIAC),improve understanding of the deformity,to provide preoperative basis for cochlear implantation.METHODS Retrospective observation of 20 cases(24 ears)of DIAC inner ear multi-spiral CT(MSCT)and MRI data,measurement and analysis of the width of the internal auditory canal(IAC)and cochlear nerve canal in the lesion group and the control group.RESULTS All DIACs had stenosis of the IAC cambined with other temporal bone malformations.MSCT shows that the 21 ears IAC,while MRI hydrography shows the 16 ears IAC divided into double tubes by bone.MRI hydrography shows a slender vestibulocochlear nerve.There were statistically significant differences(P<0.001)in the width of IAC and cochlear nerve canal between the lesion group and the control group.Six cases(8 ears)had varying degrees of hearing recovery after cochlear implant surgery.CONCLUSION DIAC shows stenosis of the IAC;The bone septa shown on MSCT are its characteristic fertures;MRI hydrography shows underdeveloped vestibular and cochlear nerves;The combination of two imaging examination methods can provide objective reference for the diagnosis of this disease and artificial auditory implantation.
