Foamy Macrophages (IMAGE) University of California - San Diego Caption When macrophages take up massive amounts of cholesterol they form “foam cells,” characterized by multiple lipid droplets (stained red). Credit Image courtesy of Marten Hoeksema, University of Amsterdam 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.