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A case of dementia with Lewy bodies that temporarily showed symptoms similar to Creutzfeldt–Jakob disease

We discuss a case of a 67‐year‐old male with dementia with Lewy bodies (DLB) that was initially suspected as Creutzfeldt–Jakob disease (CJD) or another type of encephalopathy, because he showed rapidly progressive deterioration, myoclonus, gait disturbance and a decline in activities of daily living. The present study describes a clinically atypical case with probable DLB and reviews similar cases in the literature, and we propose a rapidly progressive clinical subtype of DLB.