<unk>  <unk>  is an early-onset disorder that mostly occurs before the age of 65 but can begin earlier, and in 20–25% of cases onset is later. It is the most common early presenting dementia. The International Classification of Diseases recognizes the disease as causative to disorder affecting mental and behavioural aspects of the human organism. Dissociation from family, extreme oniomania, vulgar speech characteristics, screaming, inability to control emotions, behavior, personality, and temperament are characteristic social display patterns. A gradual onset and progression of changes in behavior or language deficits are reported to have begun several years prior to presentation to a neurologist.
Frontotemporal dementia
Fatal insomnia
Dementia with Lewy bodies
Lewy body dementias
Vascular dementia
Subcortical dementia
Semantic dementia
Early-onset Alzheimer's disease