Clinics of NeurologyCONTROVERSY exists as as to if Parkinson disease (PD) and dementia with Lewy bodies (DLB), such as diffuse Lewy entire body ailment in addition to a Lewy body variant of Alzheimer disease (AD),1 represent 2 distinct nosologic entities or whether they exist along the spectrum of a single condition, Lewy physique illness.2-seven T