Suzanne Schindler, MD, PhD, Washington University in St. Louis School of Medicine, St. Louis, MO, explains how many patients may have memory impairment symptoms, but the cause is unknown. Thus, having a blood test would improve the diagnostic tools for dementia as it would be an option that is not as expensive as an amyloid PET scan or invasive as a spinal tap. This interview was recorded during an online conference with The Video Journal of Dementia (VJDementia).