Briefly, TMEM175, a lysosomal K+ channel; GBA, a lysosomal enzyme glucocerebrosidase (GCase) that maintains glycosphingolipid homeostasis; and SNCA, circulating α‐synuclein, were previously linked to both PD and LBD [9, 19, 47, 48]. This evidence concerns the gene SNCA and Parkinson disease.