Tumor Cell Under Attack (IMAGE) Max-Planck-Gesellschaft Caption Granzymes going about their deadly work. A killer cell makes contact with a tumor cell (left) and detaches itself after one hour. After a further two hours, blisters appear (right, red arrow) on the surface of the cell that had been attacked. The tumor cells shrinks, dies and disintegrates. Credit Image: Max Planck Institute of Neurobiology / Jenne 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.