Factors Affecting Hearing Deterioration in Vestibular Schwannoma Patients Treated with Gamma Knife Radiosurgery: Asan Medical Center Experience

Park MJ1, Park HJ1, Chung JW1, Lee DH2, Cho YH2, Choi YJ3, Ahn JH1.


To investigate the changes in hearing and to determine factors predicting hearing deterioration in patients with vestibular schwannoma VS) who undergo gamma knife radiosurgery (GKRS).


A retrospective review of medical records in patients diagnosed with VS and initially treated with GKRS at a tertiary care medical center between 1995 and 2015 was performed. Tumor factors (location, volume), parameters related to irradiation to the tumor and cochlea, and distance between the tumor and cochlea were reviewed.


A significant hearing deterioration was shown in 2 years after GKRS. Tumor location, number of radiation shots, and distance between the tumor and cochlea affected hearing level after GKRS.



Acta Otolaryngol. 2017 Oct 25:1-9. doi: 10.1080/00016489.2017.1386800.