A 16 year old boy reporting several months of hip pain, weight-loss, and fatigue presented to our institution after a pelvis radiograph ordered by his family physician showed concerning findings. MR imaging of his pelvis demonstrated a large heterogeneously enhancing mass arising from the right iliac wing causing significant mass effect on the pelvic organs and soft tissues of the buttocks. A percutaneous biopsy confirmed the diagnosis of Ewing sarcoma. A staging CT of the chest was performed, demonstrating multiple lung metastases. In addition to this finding, there was multifocal bilateral nodular tumor thrombus propagating along multiple subsegmental pulmonary arteries, with a pseudo tree-in-bud morphology. Given their course, these metastatic deposits appeared endovascular in origin. Read More

Meeting name: SPR 2022 Annual Meeting & Postgraduate Course , 2022

Authors: Kryger Marc, Hernandez Alejandra, Herring Katye, Riegler Lara, Hook Marcus, Daugherty Reza

Keywords: Ewing, Sarcoma, Metastasis