GAD2 and Lewy body dementia: Findings from our report and the few other case reports lead us to hypothesize that PNS with anti-CRMP5 and/or anti-GAD65 antibodies might mimic degenerative parkinsonism, in particular MSA-P or DLB, and this should be considered as a differential diagnosis for atypical parkinsonism, especially in cases with faster and insidious progression.