[Radiosurgery for XXXX : medium- and long-term results].

@entity1 @entity15265 @entity5 @entity41
OBJECTIVE: To describe the personal experiences of treating @entity15265 ( @entity15265 ) with gamma knife or cyberknife and evaluate the medium and long-term outcomes. METHODS: From June 1999 to December 2008, 20 @entity15265 @entity1 were treated by radiosurgery (gamma knife or cyberknife). Among them, 11 had @entity41 after surgery and 9 were diagnosed by neuroradiology. All cases on magnetic resonance imaging (MRI) showed well-defined and homogeneous hyperintensity on T2-weighted images. The mean maximum diameter of @entity5 was 38.7    9.3 mm (range: 23.0 - 60.6). The volume of @entity5 ranged between 4.1 - 52.6 cm(3) with a mean of (18.7    12.5) cm(3). The @entity5 margin dose irradiated by gamma knife ranged from 9 to 16 Gy (mean 12.3    2.3 Gy). The @entity5 margin dose irradiated by cyberknife was 20 - 21 Gy in 3 fractions. The mean follow-up period was (60    32) months (range: 12 - 120). RESULTS: Follow-up imaging showed @entity5 volume decreased over 90% (n = 5), @entity5 regressed over 50% in volume (n = 9) and no change in @entity5 volume (n = 1). One @entity1 with large @entity5 (irradiated 10 Gy) was operated by open surgery at 5 months after gamma knife. Four @entity5 decreased over 50% in volume after cyberknife. Neurologically, none of these @entity1 showed any deterioration. And 16 @entity1 demonstrated an obvious improvement after radiosurgery. At the last follow-up, there were no complications related to radiosurgery. CONCLUSION: Radiosurgery (Gamma knife or cyberknife) is a safe and effective modality for small- and medium-sized @entity15265 . Fractionated Cyberknife proves to be an effective treatment for large or giant @entity15265 . Thus radiosurgery will be an alternative option to surgery.
