Right acoustic neuroma, SRS planning: right hearing loss. There is a well-defined, but mildly heterogeneous mass in the right cerebellopontine angle cistern and internal auditory canal that measures up to 19 mm. There is no mass effect upon the brainstem or cerebellum. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation.
Preoperative planning MRI demonstrates a right vestibular schwannoma. Please refer to the recent MRI for additional details.