IDH1 and glioblastoma: In our study that focussed on IDH-wild-type glioblastoma, we found that radiation doses below average to ipsilateral SVZ (< 57.4 Gy), to ipsilateral neural niches (< 57 Gy) and to contralateral neural niches (< 35 Gy) had a significant positive impact on OS with medians (p = 0.001), (p = 0.015), and (p = 0.029) respectively, but no impact however on PFS.