The Inner Ear Malformation Diagnosed by High-resolution Computed Tomography for its Classification in Sensorineural Hearing Loss / 听力学及言语疾病杂志

ABSTRACT

Objective To study sensorineural hearing loss classification and incidence of inner ear malformations based on the image of high-resolution computed tomography.Methods The investigation took the form of a retrospective review of CT findings relating to the 5 398 ears of outpatients in the general PLA hospital in the last 10 years.The inner ear malformations diagnosed by CT were classified according to the methods proposed by Sennaroglu's 2010.Results A total of 1 640 ears of inner ear malformations were found in 5 398 ears with sensorineural hearing loss by CT examination.The incidence of the inner ear malformation was 30.38% (1 640/5 398).The epidemiological information of 1 660 ears of inner ear malformation according to Sennaroglu's classification was as follows cochlea information was 53.66%(880/1 640)and non-cochlea information was 46.34%(760/1 640)of the group.Eight hundred and eighty ears of cochlea malformation consisted of these types 5 ear of Michel deformity, 23 cochlea of aplasia, 6 common cavity deformity, 69 cochlea of hypoplasia with 19 CH-I , 16 CH-II, and 34 CH-III, 777 cochlea incomplete partition with 44 IP-I , 703 IP-II and 30 IP-III.Seven hundred and sixty ears of non-cochlea malformation consisted of 680 large vestibular aqueducts, 80 simple vestibular/ semicircular canal/ internal auditory canal malformations.IP-II type and large vestibular aqueduct were related to the vestibular aqueduct malformation, making up 84.33%(1 383/1 640)ears of the whole malformation group.Conclusion The results suggest that 30.38% inner ear malformation can be found in ears with sensorineural hearing loss,higher than reported based on the image of high-resolution computed tomography.Sennaroglu's 2010 classifications have instructive significance in investigating the status of inner ear malformations.