Neurofibrillary Tangles image 1 (IMAGE) University of Pennsylvania School of Medicine Caption Abnormal neurofibrillary tangles (NFTs) -- a buildup of tau protein in parts of the brain -- helped Edward Lee, MD, PhD, an assistant professor of Pathology and Laboratory Medicine, and other Penn Medicine scientists uncover this new form of dementia. Credit Edward Lee Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.