Abstract
To compare hearing preservation between stereotactic radiotherapy (SRT) and conservative treatment of patients with unilateral vestibular schwannoma. Retrospective case series comparing hearing outcomes of patients with a unilateral vestibular schwannoma managed conservatively or with stereotactic radiotherapy in a tertiary care academic centre. Tumor database patients with American Academy of Otolaryngology Head and Neck Surgery Class A or B hearing at the onset of study. Stereotactic radiotherapy patients were predominantly those who failed conservative management. Audiometric pure tone averages and speech discrimination scores as well as patient demographics, tumor location, size and growth were extracted. Hearing outcome measures were: 1) Hearing Preservation, i.e. no drop from Class A/B to Class C/D hearing, 2) Hearing Survival of Class A/B hearing in months, 3) Audiometric Pure Tone Averages, Difference between post-treatment and pre-treatment, and 4) Speech Discrimination Score Difference (pre-treatment-post treatment). Survival analysis and non-parametric tests were used for hearing outcome measures, with multiple covariates tested. Overall, serviceable hearing preservation among the 123 patients was 51%. The median hea...Continue Reading
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