[The analysis of the characteristics of hearing loss in patients with cochlear nerve aphasia identified by MRI].

Objective:To explore the characteristics of hearing loss in patients with cochlear nerve aphasia（CNA） and to provide evidences for diagnosis and treatment of cochlear nerve aphasia. Methods:A retrospective study was performed. A total of 51 cases were included in the study. The data of hearing test, inner auditory canal MRI and temporal HRCT were analyzed. Results:77.19% of the affected ears had extremely severe hearing loss, and 7.02% of the affected ears had moderate hearing loss. The residual hearing was concentrated in low-medium frequency. A CNA ear with bone cochlear nerve canal atresia can exhibited moderate hearing loss. Conclusion:The patient with CNA may still present residual hearing function. CNA could not be excluded in patients with moderate hearing loss. The "three-dimensional integration" comprehensive evaluation system, which includesinternal auditory canal MRI, temporal thin-layer CT scan and audiology evaluation, could be helpful to the diagnosis of cochlear nerveaphasia.