Macrophages Attaching to Tumor Cell (IMAGE) Albert Einstein College of Medicine Caption Macrophages (green) are shown attaching to a metastatic tumor cell (blue) in the lung -- a process that promotes metastatic growth. Credit Albert Einstein College of Medicine 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.