Several conditions can mimic Parkinson's disease, including: Dementia with Lewy bodies. ... Essential tremor (ET). ... Viral parkinsonism. ... Normal pressure hydrocephalus (NPH). ... Multiple system atrophy (MSA). ... Progressive supranuclear palsy (PSP). ... Arteriosclerotic parkinsonism. ... Corticobasal syndrome (CBS). Dec 5, 2022