Acoustic neuroma: outcome study.

Three therapeutic modalities have been advocated in the management of acoustic neuromas: observation, surgery, and radiosurgery. Although surgery is still considered conventional treatment, at times the management can be controversial. The objectives of this article are to assess the results of each of these treatment modalities in a tertiary care acoustic neuroma referral setting. The methodology chosen was to group the patients along the initial intent to treat and then to see the results obtained. A total of 51 patients followed in the Skull Base Clinic of the McGill University Health Centre were included. The intent to treat was as follows: observation, 22 patients; surgery, 26 patients; and radiosurgery, 3 patients. The results showed that 50% of those followed by observation demonstrated growth and required surgery or radiotherapy. Surgical results, in terms of facial nerve outcome, varied with tumour size but also improved dramatically with the introduction of facial nerve monitoring and a multidisciplinary approach. In small and medium-size tumours (< 30 mm), intent to treat by observation or by surgery (with intraoperative monitoring) yielded similar results. The limitations of this study are discussed. In the future, a prospective multicentric study may help better in assessing the value of the various management options.