Still, a number of risk factors for LBD are linked to other neurodegenerative diseases: BIN1 (also AD), TMEM175 (Transmembrane protein 175; also PD), SNCA (also PD), APOE (also AD), and GBA (glucocerebrosidase; also PD, Gaucher’s disease) [10,20]. The gene discussed is SNCA; the disease is Alzheimer disease.