Melanoma (IMAGE) UT Southwestern Medical Center Caption The study found that melanoma cells (above) pass through the lymph nodes and pick up a protective coating, allowing them to survive high levels of oxidative stress and go on to form distant tumors. Credit UT Southwestern Medical Center 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.