The latest international consensus criteria of primary progressive aphasia and frontotemporal lobar degeneration:concerning progressive non-fluent aphasia and semantic dementia

Kenjiro Komori¹⁾, Yasutaka Toyota²⁾, Satoshi Tanimukai³⁾

¹⁾Clinical Psychology Unit, Zaidan-Niihama Hospital
²⁾Psychiatry Unit, Zaidan-Niihama Hospital
³⁾Ehime Graduate School of Medicene

Progressive non-fluent aphasia (PNFA) and semantic dementia (SD), which are clinical subtypes of frontotemporal lobar degeneration (FTLD) featured distinctive progressive aphasic symptoms, were examined in light of currently updated international clinical classification criteria of primary progressive aphasia (PPA). Non-fluent/agrammatic variant of PPA, recruited apraxia of speech as one of the core feature, might efine some heterogeneity of PNFA criteria. Newly classified clinical subtype, logopenic progressive aphasia (LPA) might promote its improvement. Meanwhile, some issues have to be solved in the criteria of semantic variant of PPA are discussed.

Address correspondence to Kenjiro Komori, Clinical Psychology Unit, Zaidan-Niihama Hospital (13-47 Matsubarachou, Niihama, Ehime 792-0828, Japan)