Resumen

MARTEL V, Freddy et al. Radiosurgical treatment of sporadic vestibular schwannomas: A prospective cohort study. Rev. Otorrinolaringol. Cir. Cabeza Cuello [online]. 2008, vol.68, n.3, pp.237-246. ISSN 0718-4816.  http://dx.doi.org/10.4067/S0718-48162008000400003.

Objective: To analyze the preliminary experience of radiosurgery for Vestibular Schwannomas at the Pontificia Universidad Católica de Chile. Material and methods: Thefirst 17 patients with sporadic Vestibular Schwannomas treated by radiosurgery at our institution are reponed. The marginal dose used was 12 to 12.5 Gy. prescribed at the 70 or 80 isodose Une. Patients were controlled at 6, 12 and 24 months with magnetic resonance, audiometric study and clinical examination. Results: In all of the 17 patients treated a decrease tumor enhancement on MR was demonstrated. In 16 patients (94%) a pattern of central tumor necrosis was observed during the firsyear Actuaría! useful hearing was maintained in 62.5% at 2 year after treatment. Facial nerve function was maintained in all of the 15 patients with normal function at treatment (100%). Trigémina! function was maintained in all of the 14 patients (100%) with previous normal trigeminal function. The mean time to return to work or normal activities was 11.5 days after treatment Conclusions: These preliminary results are comparable with results published in the literature and reinforce the demónstrate role oí radiosurgery in the management oí vestibular schwannomas.

Palabras clave : Schwannomas; radiosurgery; linear accelerator.

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