Circulating Tumor Cells (image) University of Southern California - Health Sciences Share Print E-Mail Caption Circulating tumor cells from the blood of a breast cancer patient are shown. Credit Image by Maria C. Donaldson and Min Yu Usage Restrictions Please include appropriate caption and credit information. Share Print E-Mail 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.