“…129,131 Another cause of RBD in younger and some older patients is paraneoplastic or autoimmune disorders, such as the anti-voltage-gated potassium channel antibody complex syndrome (including the CASPR-2 and LGI-1 epitopes), IgLON5 disease, and brainstem lesions caused by inflammatory, neoplastic, or cerebrovascular disorders. 29,57,64,132–139 In addition, both RBD and RSWA have been strongly associated with antidepressant use, especially selective serotonin reuptake inhibitors, selective norepinephrine reuptake inhibitors, and tricyclic antidepressants, and it remains unclear whether this association is mediated by reversible pharmacological effects or whether antidepressants are causing earlier expression of RSWA and RBD in predisposed individuals with covert synucleinopathy 15,16,21,30 in a manner analogous to drug-induced parkinsonism.…”