The Virtual and the Real (IMAGE) Brown University Caption These computer-generated depictions of a growing brain tumor show growth at six, eight and 12 months (top, left to right), with development of infiltrative cell front (arrow) at 12 months. Tissue slide (bottom) shows tumor finger (black arrow) advancing in substrate gradient (white arrow). Credit Bearer lab 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.