Serotonin uptake regulates ependymoma tumor growth (IMAGE) St. Jude Children's Research Hospital Caption Stephen Mack, PhD, St. Jude Department of Developmental Neurobiology, uncovered a link between ependymoma tumor growth and serotonin release, shining light on the underappreciated relationship between tumor neuronal communication and tumorigenesis. Credit St. Jude Children's Research Hospital Usage Restrictions No cropping 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.