Génétique de la maladie d’Alzheimer : formes autosomiques dominantes

A New Presenilin-1 Missense Variant Associated With a Progressive Supranuclear Palsy-like Phenotype

Early-onset forms of Alzheimer disease (AD) have been associated with pathogenic variants in the APP , PSEN1 , and PSEN2 genes. Mutations in presenilin-1 ( PSEN1 ) account for the majority of cases of autosomal dominant AD. Numerous phenotypes have been associated with PSEN1 -pathogenic variants, including cerebellar ataxia and spastic paraplegia. Here, we describe a patient with early-onset AD presenting with extrapyramidal symptoms and supranuclear gaze palsy, mimicking progressive supranuclear palsy.

[Diagnosis contribution of biomarkers in Alzheimer disease: A case of frontotemporal dementia]

INTRODUCTION

Cerebrospinal fluid biomarkers are a fundamental contribution for the diagnosis of Alzheimer disease, in particular for young people.

CASE REPORT

We report a case of Alzheimer disease of a 51-years old man whose clinical presentation corresponded to frontotemporal behavioural criteria. The clinical evaluation noticed some troubles in verbal memory. Only the CSF biomarkers confirmed the diagnosis.

CONCLUSION

There are different phenotypes of presenile Alzheimer disease and among them we note frontotemporal dementia. It is very important to identify them to introduce a specific treatment.