The purpose of this study was the retrospective evaluation of patients following LSRS for tumor of pontocerebellar angle area. Methods: From 1992 to 2002, we radiosurgicaly treated 438 patients, 83 of them for pontocerebellar angle tumors mostly present on the brainstem. In endeavour not to cause a complication to the patients, we administered doses about 12,0 Gy, in averagel4,2 Gy.(l) The amount of TD depended on the tumor volume, its relation to adjacent structures, histology, former RT and patients neurological status. Results: Radiographic and clinical FU were compared annually after SRS. The difficulty with pontocerebellar angle tumors is a correct diagnose - is it acoustic schwannoma, schwannoma of another nerve or meningioma? For MRI diagnostic of meningiomas the infiltration and thickening of dura (so called "dura sign") are monitored in the tumor area. The examination of hearing by audiometry and EMG (by the paresis of facial nerve) are mandatory.
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