CSF Aβ40 Levels Do Not Correlate with the Clinical Manifestations of Alzheimer's Disease.

Introduction: Cerebrospinal fluid (CSF) biomarker quantification provides physicians with a reliable diagnosis of Alzheimer's disease (AD). However, the relationship between their concentration and disease course has not been clearly elucidated. This work aimed to investigate the clinical and prognostic significance of Aβ40 CSF levels.