Parkinson’s disease (PD) can lead to dementia, with estimates ranging from 20–80% of people with PD eventually developing it.
Parkinson’s disease dementia (PDD) is dementia that is associated with Parkinson’s disease (PD). Together with dementia with Lewy bodies (DLB), it is one of the Lewy body dementias characterized by abnormal deposits of Lewy bodies in the brain.
https://en.m.wikipedia.org/wiki/Parkinson%27s_disease_dementia