Image of an Adenoma (image) Institute for Research in Biomedicine (IRB Barcelona) Share Print E-Mail Caption This is an image of a benign colon tumor. In green, adenoma stem cells. The scientists have discovered that the colon has a safety mechanism to prevent the self-renewal of adenoma stem cells. Credit (Image: Colorectal Cancer Lab, IRB Barcelona) Usage Restrictions None 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.