Les démences du sujet jeune

In the international literature, early onset dementia are defined by the first signs before the age of 65. In France, the Alzheimer plan determined the threshold to 60 years, which is the age for access to certain welfare benefits or accommodation facilities. Today, the number of patients in France with a dementia before the age of 65 is estimated to 32,000 as reported by the Office Parlementaire d'Évaluation des Politiques de Santé (OPEPS) report in 2005. The prevalence of dementia before the age of 65 in population studies is 80 over 100 000 on average. The causes are more numerous and the clinical presentations are more atypical compared to dementia in the elderly, including Alzheimer's disease with a predominance of instrumental difficulties. More the age of onset is earlier, more genetic and metabolic causes, potentially treatable, are common. They are expressed most often by a “dementia plus syndrome”, requiring a detailed clinical evaluation. On the medico-social, aid granted to young patients are specific and include the Prestation de Compensation du Handicap (PCH), which can be obtained from the Maison Départementale des Personnes Handicapées (MDPH), a reference to the administrative procedures of young patients with dementia.