In the case of tau lesions, FTLD-tau can be subdivided further to CBD (Dickson et al., 2002), progressive supranuclear palsy (PSP; Hauw et al., 1994), Pick’s disease (PiD; Dickson, 1998), argyrophilic grains disease (AGD; Braak and Braak, 1987, 1989), sporadic multisystem tauopathy (MST; Bigio et al., 2001) and diffuse NFT dementia with calcifications (DNTC; Kosaka, 1994). The gene discussed is MAPT; the disease is transient myeloproliferative syndrome.