This study will examine inflammation in individuals with Dementia with Lewy Bodies (DLB) and Mild Cognitive Impairment with Lewy Bodies (MCI-LB). This study is open to individuals with DLB and MCI-LB age 40 and over. Participants in this study will be invited to participate in future clinical research on DLB and MCI-LB at Stony Brook University. For more information please email sandra.skinner@stonybrookmedicine.edu or call 631-444-7513.