Metastatic tumor (IMAGE) Sanford Burnham Prebys Caption This image shows metastatic tumor cells. Credit Charles Spruck, Ph.D/Sanford Burnham Prebys Usage Restrictions Credit required. License Original 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.