PREDICTING NONAUDITORYADVERSE RADIATION EFFECTS FOLLOWING RADIOSURGERY FORVESTIBULAR SCHWANNOMA: AVOLUME AND DOSIMETRIC ANALYSIS

*Gamma Knife Unit, Division of Neurosurgery, University Health Network, Toronto, Canada; yRadiation Medicine Program, Princess Margaret Hospital, Toronto, Canada; zRadiation Oncology Program and Division of Neurosurgery, Sunnybrook Hospital, Toronto, Canada; xRadiation Oncology Program, Princess Margaret Hospital, Toronto, Canada; and {Division of Neurosurgery, Hospital for Sick Children, University of Toronto, Canada