RESUMO
The results of radiotherapy treatment were evaluated in 38 patients with primary brain tumors [32 gliomas and 6 meningiomas]. During the period from January 1990 to December 1992, 21 males and 17 females with histologically verified brain tumor were attended and received radiotherapy at Oncology Unit, Radiology Department, Tanta University Hospitals. In glioblastomas multiforme and astrocytomas whole brain irradiation was given using two parallel opposed lateral fields to a total dose of 4000-5000 cGy in 4-5 weeks. Localized irradiation was given to the small volume in a boost dose of 1500 to 2500 cGy in 1.5 to 2.5 weeks. For meningiomas the selection of the small localized field was based on tumor size and histology with a total tumor dose of 5000 cGy to 5500 cGy in 5.5 to 6 weeks. Following radiotherapy patients were examined by both computed tomography [CT] and electroencephalography [EEG] which were compared with pre- and postoperative results. After radiotherapy CT evidence of brain tumor response to treatment was not marked. EEG showed marked changes compared to CT