Nor do our data suggest incorrect diagnosis: although only 49 of the patients have had post-mortem examination, the results confirmed clinicopathological correlations in keeping with the literature [very high for PSP (Gazzina et al., 2019) and svPPA (Spinelli et al., 2017), predominantly corticobasal degeneration or Alzheimer’s disease pathologies for CBS (Alexander et al., 2014), and either tau or TDP43 pathologies for bvFTD (Perry et al., 2017)]. This evidence concerns the gene MAPT and Alzheimer disease.