Dr. Rene Galindo (right), Dr. Eric Olson (IMAGE) UT Southwestern Medical Center Caption Dr. Rene Galindo (right), lead author of the study who is an assistant professor of pathology at UT Southwestern and a pediatric pathologist at Children's Hospital, and Dr. Eric Olson, senior author of the study and chairman of molecular biology at UT Southwestern, determined that mature muscle fibers, rather than their less-developed neighbors, are the tissues that turn malignant in a soft-tissue cancer that strikes children and teens. 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.