that reaches delusional intensity. Although delusional jealousy has been described in relation to organic psychosis, little is known conceming the actual role of delusional jealousy in dementia.The aim of the present Study was to investigate the clinical features ofdeus. Gore jealousy and possible mechanisms whereby. delusional jealousy arises in patients with dementia Method: We studied 208 Consecutive outpatients with dementia (diagnosis based on DSM- H -R criteria, mean SD] age of 7708.0] years; study period: September 2011- August 2012) Delusiondjealousywas defined as a false. belief derived from a pathological jealousy that makes the patient believe that his other spouse is bird faithfu.The prevalence of delusionaljealousywas compared between Alzheimers disease, dementia with Lewy bodies, and vascular dementia, patients with and without delusional jealousy were Compared in terms of general characteristic. In addition each patient with delusional jealousy andthe primary Caregivers were interviewed aboutthedina features of the Syndrome.