The most common form of sporadic FTD is FTD-tau; this term includes progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), Pick’s disease (PiD), argyrophilic grain disease (AGD), globular glial tauopathy (GGT), age related tau astrogliopathy (ARTAG) and primary age-related tauopathy (PART) [105]. The gene discussed is MAPT; the disease is argyrophilic grain disease.