IDH1 and neoplasm: Similarly, tumor lobe localization had no significant effect on MMSE concentration-calculation, DS backwards, TMT B, and COWAT phonemic score means, neither in the IDH1 mutant (p = .39, p = .20, p = .09, and 0.11, respectively) nor in the IDH1 wild-type (p = .22, p = .32, p = .17, and p = .38, respectively) group.