HomePhilippine Journal of Otolaryngology Head and Neck Surgeryvol. 29 no. 2 (2014)

Sensorineural Hearing Loss: What Lies Beneath? Neurovascular Conflict Secondary to a Dural Arteriovenous Malformation

Ian C. Bickle

 

Abstract:

Auditory impairment is a condition with a legion of potential causes. One of the routine aspects of the assessment process for those with sensorineural hearing loss is MR imaging (MRI) of the internal auditory meati (IAMS). The vast majority of MRI studies are normal, however one of the more commonly identified pathologies are cerebrovascular abnormalities. The most-well recognised is neurovascular conflict of the vestibulocochlear nerve by a vascular loop at the root entry zone (REZ), however a broader range of potential responsible structural abnormalities are known. A wide range of processes for auditory dysfunction have been outlined.1 These include: cerebral ischemia events, subarachnoid hemorrhage, cerebrovascular malformations and rarely dural arteriovenous fistulas (dAVFs).