Although chemotherapy provided an additive effect, it did not reach statistical significance [ 27 ].
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Reirradiation for recurrent glioblastoma: the significance of the residual tumor volume.
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The sentences
In a study of 147 patients with recurrent high-grade gliomas, including 105 glioblastomas (71%), hypofractionated irradiation with a single dose of 3.5 Gy up to a median total dose of 35 Gy showed a trend toward better overall survival with doses above 35 Gy [ 26 ].