IDH1 and neoplasm: These include functional and structural connectivity/network measures56 from either resting state fMRI,30,57 task-based fMRI,58 or diffusion-weighted MRI,59 and proximity of the tumor to certain white matter tracts.60 Furthermore, several molecular markers in addition to IDH status have been related to cognitive functioning.8 These, however, have not yet been collected in sufficient numbers in (our) clinical practice to include in retrospective analyses.