XXXX : A six year experience with Gamma Knife radiosurgery.

@entity1 @entity41 @entity5 @entity1732 @entity976
The focused radiation produced by radiosurgery offers the theoretical advantage of a reduced radiation dose to surrounding structures during the treatment of @entity976 when compared with fractionated radiotherapy. A retrospective analysis of 23 @entity1 treated since 1992 was undertaken. Intracystic @entity1732 treatment in 10 @entity1 with @entity5 proved to be effective in preparing the @entity5 for radiosurgery. The mean prescription dose in this series was 10.8    8.7 Gy delivered to a mean prescription 47% isodose. There was a @entity41 in 74%. In this series, initial @entity5 volume and target volume were significant prognostic factors. @entity5 and targets were more likely to shrink. Five @entity1 with large multicystic residual or recurrent @entity5 after multiple surgical attempts showed further progression. The maximum radiation dose, prescription dose and choice of prescription isodose were not significant prognostic factors within this series. Radiosurgery resulted in no mortality and no significant morbidity could be attributed to it. Clinically, the best results with radiosurgery were obtained with @entity5 amenable to stereotactic drainage and intracystic @entity1732 treatment.
