Organoids of Mouse Pancreatic Tumor Cells (IMAGE) Cold Spring Harbor Laboratory Caption Organoids of mouse pancreatic tumor cells grown "ex vivo," outside the body. Organoids are used as a model system to study tumor biology and treatments. Credit Credit: Tobiloba Oni, Tuveson lab/CSHL Usage Restrictions Attribution required 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.