The progressive neurodegenerative disorders, Parkinson’s disease (PD) and dementia with Lewy bodies (DLB), are characterised by features of intracellular insoluble filamentous inclusions (also known as Lewy bodies, LB) of the protein α-synuclein [1], accompanied by cell death in certain parts of the brain. Here, SNCA is linked to Lewy body dementia.