MHC-II Breast Cancer Cells (IMAGE) Cold Spring Harbor Laboratory Caption A molecule called MHC-II (seen here in green) disguises metastatic breast cancer cells (red), allowing them to invade the lymph nodes and take root without provoking an immune response. Credit Beyaz lab/Cold Spring Harbor Laboratory Usage Restrictions Attribution required 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.