Inherited cases of FTD are referred to as familial FTD (fFTD) (Russell 2022) and autosomal dominant mutations in three genes have been found to account for the majority of such heritability: progranulin (GRN), microtubule‐associated protein tau (MAPT) and chromosome 9 open reading frame 72 (C9orf72) (Greaves and Rohrer 2019). The gene discussed is GRN; the disease is frontotemporal dementia.