???? ???? ??? ??? ?? ??? ??? ???? ????,????,???? ?? ?? ??? ?? ?? ???? ??? ?? ? ?? ? ??? ??????. ?? ??? ????? ?????.?? ?? ????? ?? ??? ?? ??? ??? ???? ????. Somewhere around 87 % of Ewing sarcomas are Ewing sarcoma of bone, which is a bone tumor that typically happens while in the thigh bones (femurs), pelvis, ribs, or shoulder blades. Extraosseous