MAPT and corticobasal degeneration disorder: Both PCA and DLB have shown atypical patterns of tau deposition that do not fit the traditional Braak staging scheme.33, 34 Should other pathologies be present in our PCA patients, such as TAR DNA‐binding protein‐43 or corticobasal degeneration, they would likely diminish the differences in AV‐1451 uptake between PCA and DLB but not vice versa.