Dr. Jonathan Graff-Radford, guest editor of the February 2019 Dementia issue of Continuum, discusses hippocampal sclerosis of aging. To learn more, read the article “Hippocampal Sclerosis, Argyrophilic Grain Disease, and Primary Age-related Tauopathy” by Drs. Gregory A. Jicha and Peter T. Nelson in that issue.