Youg Onset Dementia FRESH-PEF5391-en Florence PASQUIER Youg Onset Dementia YOD FRESH-PEF5391-en 5391 FRESH-PEF5391 Florence RICHARD Florence PASQUIER UNIVERSITE DE LILLE CENTRE HOSPITALIER UNIVERSITAIRE DE LILLE (CHU) Epidemiology France Portal (PEF) MINISTERE DU TRAVAIL, DE LA SANTE, DES SOLIDARITES ET DES FAMILLES null Florence;RICHARD Florence;PASQUIER Dementia Alzheimer's disease Frontotemporal dementia Vascular dementia Dementia with Lewy bodies Early Onset Pronostic factors Social impact Medical pathway genetics Paediatrics Psychiatry Socio-demographic and economic determinants Collect of medical, medicosocial, economic, neuropsychological,biological and imaging information in young patients consulting at CNR-MAJ, with follow-up every 6 months until death. If specific consent has been granted, an autopsy for neuropathological confirmation of the diagnosis will be performed. Primary objective - To determine the diagnostic and medicosocial pathways followed by young patients suffering from early onset dementia Secondary objectives - To evaluate factors associated with diagnostic delay - To constitute clinical, imaging and biological resources for this dementia occuring in young subjects. null France Individuals Patients population Male Female Adult (25 to 44 years) Middle Aged (45 to 64 years) Aged (65 to 79 years) volunteer patients referred to the CNR-MAJ (Lille-Rouen-Paris Salpêtrière) for a dementia syndrome begining before age 60. Clinical data Participant-reported health data Biological data Socio-demographic data Paraclinical data (non-biological) : Imaging Health event/morbidity Health event/mortality Others Other Through organizations (health services or institutions schools businesses etc.) < 500 individuals Converting or copying information into a structured record Observational Study Observational Study Morbidity registry 338 (dont/with 220 Alzheimer) Unknown To be defined Access on specific project only