Lung Tumors (IMAGE) Massachusetts Institute of Technology Caption A new MIT study explains why dendritic cells (green) in lymph nodes that drain from the lungs fail to stimulate killer T cells (white) to attack lung tumors. Credit MIT Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.