[How Can We Suspect a Preclinical Alzheimer's Disease Only Through History Taking and Neurological Examination?].

Investigations of clinical biomarkers for discovering a preclinical Alzheimer's disease (AD) remain behind those of CSF and PET biomarkers. Almost all of today's checklists for early detection of AD are not generally useful for recognizing preclinical AD. Conversely, activities of daily living or language ability should be evaluated. In addition, focusing on risk factors for onset of AD, such as living alone/social isolation, hearing loss, hyposmia, loss of teeth, body weight changes, apathy/depression, and their combination, is valuable for the clinical investigation of preclinical AD.