In patients with newly diagnosed glioblastoma undergoing temozolomide chemoradiation, is an ultra-hypofractionated 6x6 Gy regimen over 2 weeks non-inferior to standard 30x2 Gy over 6 weeks with respect to 2-year overall survival?
RTOG 1114
Multicenter Randomized Phase II Study of R-MPV-A Chemoimmunotherapy With or Without Low-Dose Whole-Brain Radiotherapy for Newly-Diagnosed Primary CNS Lymphoma
Bottom Line: Adding low-dose WBRT (23.4 Gy) to R-MPV-A chemoimmunotherapy substantially improved 2-year PFS (78.7% vs 54%, HR 0.47, P=0.007) and complete response rates without producing measurable excess neurocognitive decline; OS difference was numerical only.