Right acoustic neuroma, SRS planning MRI: tinnitus and dizziness. There is a mass within the right cerebellopontine angle cistern with extension into the right internal auditory canal that measures up to 18 mm. There is negligible mass effect upon the adjacent right middle cerebellar peduncle. There is no evidence of intracranial hemorrhage. The ventricles are normal in size. The skull and extracranial soft tissues appear grossly unremarkable.
Pretreatment planning MRI demonstrates a right vestibular schwannoma that measures up to 18 mm.