Genetic associations of the SNCA gene have been reported with several neurodegenerative disorders that share the common pathology of Lewy bodies (LB), including familial and non-familial Parkinson’s disease (PD) (Pals et al., 2004; Mueller et al., 2005; Maraganore et al., 2006; Mizuta et al., 2006; Ross et al., 2007; Winkler et al., 2007; Myhre et al., 2008; Pankratz et al., 2009; Satake et al., 2009; Simon-Sanchez et al., 2009, 2011; Edwards et al., 2010; Mata et al., 2010; Spencer et al., 2011). The gene discussed is SNCA; the disease is Parkinson disease.