Adenoma (IMAGE) University of Helsinki Caption R-Spondin 1 -treated intestinal tumor (adenoma). Green staining shows the borders of the epithelial cells, apoptotic cells are shown in red and nuclei in blue. Credit Marianne Lähde Usage Restrictions Credits: Marianne Lähde 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.