IDH1 and central nervous system cancer: As expected, age and the distribution of WHO grade significantly differed between the two groups, with IDH‐wt patients being older (t(52) = 3.592, p = 0.001), more often having WHO grade IV glioma (χ2 (2, n = 54) = 16.517, p < 0.001) and more often using dexamethasone (χ2 (1, n = 50) = 6.603, p = 0.010).