Ewing Sarcoma Tumor (IMAGE) St. Jude Children's Research Hospital Caption This Ewing sarcoma tumor in this MRI image of the lower extremities involves the right tibia bone (white arrow) and is associated with a soft tissue mass (black arrows). Credit Drs. Navid, Coleman, Hillenbrand/St. Jude Children's Research Hospital 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.