However, non-paraneoplastic encephalitides also can manifest with parkinsonism: indeed, patients with LGI1, DPPX and GAD antibodies have been misdiagnosed with Parkinson’s disease, PSP or multisystem atrophy (Pittock et al., 2006; Tobin et al., 2014; Kurtis et al., 2015). The gene discussed is GAD1; the disease is Parkinson disease.