athogenesis in FTD and psychosis Some studies have shown that 30-50% of FTD is familial, suggesting a genetic root for FTD (Seelaar et al., 2011; Ferrari et al., 2011). Mutations of pro- granulin (GRN) and microtubule associated protein tau (MAP?) account for about 50% of the familial RIONTS -- • 41:e EF