Lately anenormous number of articles have been written regarding RBD due to its increasedassociation with neurodegenerative diseases, mainly synucleinopathies caused by thepathologically deposition of alpha-synuclein, including Parkinson’s Disease (PD),Multiple System Atrophy (MSA) and Dementia of Lewy Bodies (DLB). Here, SNCA is linked to Lewy body dementia.