macrophages (IMAGE) Johns Hopkins Medicine Caption In a sea of cancer cells (blue), macrophages (green) are close neighbors to metastatic-initiating cancer cells (magenta). Credit Won Jin Ho, Johns Hopkins Kimmel Cancer Center Usage Restrictions N/A 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.