Clinical presentation of diffuse Lewy body pathology Lead Investigator: Jason Crowell Institution : University of Virginia E-Mail : jlc5rh@virginia.edu Proposal ID : 693 Proposal Description: Amongst patients with clinical diagnoses of Parkinson's Disease Dementia and Dementia with Lewy bodies, we are interested in any clinical differences between patients ultimately found to have pure diffuse Lewy body pathology as compared to patients with heterogeneous neuropathological findings. Specific clinical characteristics which may be different include disease onset, behavioral symptoms, neurological exam (motor) findings, or neuropsychological scores.