What is your approach to brain reirradiation in the setting of recurrent/progressive gliomas?

A lot of factors need to be considered prior to offering brain reRT in such a setting, most importantly- interval since the 1st course of RT, patient's ECOG and neurologic function, age, perceived life expectancy, size of the lesion, location of the lesion, WHO grade of glioma, patient's expectation...

I assume that grade II glioma was treated with 54 Gy, and there was sufficient time interval for re-irradiation, and other treatment options were also discussed. I use fractionated radiourgery: 8 Gy x 4 fractions to the contrast enhancing lesion (total 32 Gy) and 6 Gy x4 to the area of new flair abn...