Epidermal stem cells (IMAGE) Rockefeller University Caption Epidermal stem cells (green) form small bud-shaped structures that later become tumors. Credit Laboratory of Cell Biology and Development at The Rockefeller University Usage Restrictions Image may be used to illustrate research described in the accompanying release. 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.