Brain Tumor Cells in Mouse Model (IMAGE) Michigan Medicine - University of Michigan Caption To create the new mouse model of children's brain cancer, the researchers caused a mutation that occurs in many tumors, and used special stains to see the difference between healthy brain tissue (red) and the areas where the mutation took hold and a tumor arose (blue/green). Credit University of Michigan Usage Restrictions Credit University of Michigan 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.