???? ???? ??? ??? ?? ??? ??? ???? ????,????,???? ?? ?? ??? ?? ?? ???? ??? ?? ? ?? ? ??? ??????. ?? ??? ????? ?????.?? ?? ????? ?? ??? ?? ??? ??? ???? ????. Close to 87 percent of Ewing sarcomas are Ewing sarcoma of bone, that's a bone tumor that typically occurs from the thigh bones (femurs), pelvis, ribs, or shoulder blades. Extraosseous (or extr