They comprise a group of diseases called frontotemporal lobar degeneration with tau inclusions (FTLD‐tau), which includes Pick's disease (PiD), corticobasal degeneration (CBD), progressive supranuclear palsy (PSP), globular glial tauopathy (GGT), and argyrophilic grain disease (AGD).1, 22, 23. This evidence concerns the gene MAPT and argyrophilic grain disease.