Human Cancer under Microscope (IMAGE) University of Southampton Caption Human cancer under a microscope. The black dots on the right of the image are lymphocytes which are trying to get at the tumor, but are being stopped by cancer-associated fibroblasts. Credit University of Southampton Usage Restrictions Credit required. 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.