Glowing Lung Tumor (image) University of Pennsylvania Caption Viewed under infrared light, a tumor in a dog's lung glows green. The targeted dye ICG concentrates in cancerous tissues, allowing surgeons to tell normal tissue from tumor. The result may be a better surgical outcome. Credit University of Pennsylvania Usage Restrictions None 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.