Single Circulating Tumor Cells (IMAGE) Queensland University of Technology Caption Single circulating tumor cells (green) in blood of a head and neck patient. Credit Image: QUT, Arutha Kulasinghe 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.