I agree with @Sushil Beriwal, and approach patients with atypical meningioma in the same fashion, preferring IMRT to SRS. Indeed most publications have used fractionated external beam therapy, but several centers have published results with SRS. I encourage anyone to have a close look at these. The ...

We treat them with fractionated RT as almost all the published data is for EBRT. For this grade 2 disease, besides treating GTV, one treats for microscopic disease also by expanding for CTV, which SRS by itself will not be able to account for. RTOG is conducting a study for this disease e...