Abstract
Atypical forms of Alzheimer's disease (AD) have long been described, but it's only recently that the aphasic, frontal, and visuospatial variants have been included in the clinical diagnostic and research criteria for AD. The frontal form, also known as the behavioral and/or dysexecutive form of AD, is still a poorly understood and poorly defined entity. Patients present with either behavioral or executive disorders, or both. It is now possible to establish, in vivo, a diagnosis of frontal variant AD (fv-AD) with a high degree of probability by comparing the neuropsychological profile and biomarkers. However, the neuropsychological and behavioral profile of patients with fv-AD is still poorly understood, often leading to diagnostic difficulties and confusion with the behavioral variant of frontotemporal lobar degeneration (bv-FTLD), which is the main differential diagnosis. We will illustrate the difficulties sometimes encountered in practice in the differential diagnosis between these pathologies through a clinical observation.
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