An Aggressive Cancer (IMAGE) University of Iowa Caption Melanoma cells move quickly, extending cables to reel in other cells and form tumors. The panels show how individual melanoma cells came together to build a tumor in just four hours. Credit David Soll laboratory, University of Iowa 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.