NF-2 and bilateral vestibular schwannomas. Prior subtotal resection of right vestibular tumor in 2015. Headaches. There are postoperative findings related to right suboccipital craniotomy, with mild encephalomalacia in the right cerebellar hemisphere. There is an enhancing mass in the right cerebellopontine angle cistern with slight extension into the right internal auditory canal that measures up to 30 mm, previously 25 mm. There is associated mass effect upon the adjacent brainstem and right cerebellar hemisphere. There is also an enhancing lesion in the left cerebellopontine angle cistern internal auditory canal that measures up to 12 mm, previously 10 mm, without significant mass effect upon the cerebellum or brainstem. There is an enhancing lesion along the posterior falx cerebri, measuring up to 5 mm in thickness. There is no evidence of acute infarction. The ventricles are unchanged in size. There is no midline shift or herniation. There is a left maxillary sinus retention cyst.
1. Interval increase in size of the bilateral vestibular schwannomas, right larger than left.2. A small lesion along the posterior falx cerebri likely represents a meningioma. 