Brain Tumor Blood Vessels (IMAGE) Michigan Medicine - University of Michigan Caption This microscopic view of a section of mouse brain shows tiny clusters of tumor cells growing along existing brain blood vessels. Credit University of Michigan Medical School Usage Restrictions None 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.