Right vestibular schwannoma treated to 12.5 Gy using SRS: dizziness. There is has been slight interval increase in size of the right vestibular schwannoma that is extends from fundus of the internal auditory canal to the cerebellopontine angle cistern, now measuring up to 21 AP x 24 RL x 18 SI mm, previously 20 AP x 21 RL x 16 SI. There is associated increased mass effect upon the right middle cerebellar peduncle and right cerebellar hemisphere, where there appears to be mild edema. There is persistent slightly diminished fluid signal within the right labyrinthine structures. There are unchanged mild scattered foci of cerebral white matter T2 hyperintensity, which likely represent microangiopathy.
Slight interval increase in size of the right vestibular schwannoma.