Left sensorineural hearing loss. Right: There is a 3 mm diameter lesion in the fundus of the right internal auditory canal, along the course of the inferior vestibular nerve. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable. The bilateral mastoid air cells and middle ears also appear unremarkable. Left: The cranial nerve 7 and 8 complexes are intact. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable.Miscellaneous: There are bilateral maxillary sinus retention cysts, right larger than left.
1. A 3 mm diameter lesion in the fundus of the right internal auditory canal likely represents a schwannoma. 2. No evidence of left retrocochlear or inner ear lesions.