cancer cell surrounded (IMAGE) Penn State Caption Penn State researchers 3D bioprinted breast cancer tumors (green) and cultivated their supportive microenvironments (purple) to better understand how they interact with one another. Image: Credit Ozbolat Lab/Penn State Usage Restrictions non commercial use only 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.