SNCA and frontotemporal dementia: This holds true not only for AD, but also for Frontotemporal Dementia (FTD) and variants thereof, such as Pick’s Disease (PiD), Corticobasal Degeneration (CBD), Progressive Supranuclear Palsy (PSP), as well as other common (e.g., Parkinson Disease (PD) Traumatic Brain Injury (TBI), both of which are clearly secondary to alpha-synuclein deposition and physical injury, respectively) and rare genetic diseases [45,46,47,48] (see also Table 1 for an exemplary list of genetic, epigenetic, primary, and putative secondary tauopathies).