CLINICAL SUMMARY
Ewing sarcoma is approximately half as common as osteosarcoma. It arises from bone marrow and almost always presents with a large soft tissue mass. Compared to osteosarcoma, it is more common in the flat bones, such as the pelvis, although still more prevalent in the extremities overall. Treatment and prognosis are largely analogous to osteosarcoma, with chemotherapy similarly being given before and after wide resection.
DIAGNOSTIC FEATURES
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