C9orf72 and mild neurocognitive disorder: The sporadic FTLD-TDPB cases (both of whom had FTD-MND) had moderate to severe dystrophy in all regions, worse in white matter, and of the three genetic FTLD-TDPB cases with C9orf72 mutations, one with behavioural variant frontotemporal dementia (bvFTD) had mild dystrophy in three out of four regions but moderate dystrophy in TW, and the other two cases (bvFTD or FTD-MND) had moderate dystrophy in three regions but severe dystrophy in the remaining region (FW in bvFTD and TG in FTD-MND).