Right acoustic neuroma, MRI for SRS treatment planning: right hearing loss and imbalance. There is a mass within the right internal auditory canal that measures up to 11 mm. The tumor protrudes slightly into the right cerebellopontine angle cistern. There is nonspecific patchy cerebral white matter T2 hyperintensity bilaterally. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. There appears to be an azygous ACA. There is mild mucosal thickening in the bilateral maxillary sinuses. There are bilateral lens implants.
Preoperative planning MRI demonstrates a right vestibular schwannoma that measures up to 11 mm.