???? ??? ?? ?? ? ????? ? ?? ??? ?? ???? ??? ??? ? ??? ? ??? ? ?? ? ??? ??? ??????.????? ?? ???? ? ??? ???? ??? ?? ??? ?? ??? ?????? ??? ?? ?????? ??? ?? ??? ?? ?? ?? ??? ?????? ???? ?? ??? ?? ??? ?? ? ???? ? ?? ??? ????.Roughly 87 per cent of Ewing sarcomas are Ewing sarcoma of bone, that is a bone tumor that typically takes place inside the thigh