IGLON5 and Lewy body dementia: In comparison to the high frequency of multiple comorbidities in PD [28], studies of the available literature revealed only a few coincident DLB and other disorders, e.g., rare comorbidity with autoimmune disorders like myasthenia gravis [118] or Hashimoto encephalopathy [119], whereas there is a significant overlap between anti-IgLON5 disease, an autoimmune encephalitis, and DLB [120].