CTC Image Labels (IMAGE) University of Wisconsin-Madison Caption An array of captured cells stained with fluorescent dyes helps identify cells coming from tumors (CTCs, in red and blue) and exclude normal white blood cells (leukocytes, in green and blue). Credit Michael Poellmann 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.