Macrophages (IMAGE) Memorial Sloan Kettering Cancer Center Caption Tumor-associated macrophages (red) outcompeting endothelial progenitor cells (green), leading to cell death (white). Credit Ming Li Lab, Memorial Sloan Kettering Cancer Center Usage Restrictions Attribution License Original 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.