Unilateral left sensorineural hearing loss. Reevaluate known vestibular schwannoma.. Again seen is a 3 x 2 x 2 mm (AP x transverse x craniocaudal) enhancing lesion involving the superior lateral aspect of the right internal auditory canal likely representing a schwannoma. The remainder of the bilateral inner ear structures including the cochlea, vestibule, endolymphatic duct, and semicircular canals appear unremarkable. Specifically, no lesions on the left are appreciated. The bilateral mastoid air cells and middle ears also appear unremarkable. Again seen are bilateral maxillary sinus retention cysts, right larger than left.
Unchanged 3 mm enhancing lesion in the lateral aspect of the right internal auditory canal likely representing a schwannoma.