IDH1 and glioblastoma: Our previous nomogram on all newly diagnosed GBM patients regardless of IDH mutation status included age at diagnosis, sex, KPS, surgical resection, and MGMT methylation status.22 We built on this nomogram by subsetting to IDH-wild-type patients only, and adding other important prognostic variables such as concurrent radiation/TMZ.1,2,5,9–11,16,17,19,21 Even with these differences, the 2 nomograms share some similarities.