[The concept of frontotemporal lobar degeneration]. / Le concept de dégénérescence lobaire fronto-temporale.

Consensus criteria have been recently proposed to improve clinical identification of frontotemporal dementia, non fluent progressive aphasia and semantic dementia (Neary et al., 1998). However, clinical observations show that these syndromes may overlap, underlying the value of the more generic entity of frontotemporal lobar degeneration.