Phylogenetic trees of cancer cells (IMAGE) Whitehead Institute for Biomedical Research Caption Phylogenetic trees show the evolution of cancer cells in a tumor into different subpopulations, marked in red and blue. The colors around the rings represent the different cell states, or categories of cell characteristics, into which cells evolved. Credit Courtesy of Dian Yang Usage Restrictions Must attribute 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.