sarcoma treatment and prognosismetastatic sarcoma prognosisepithelioid sarcoma prognosispleomorphic sarcoma prognosissarcoma cancer prognosisabdominal sarcoma prognosisbladder sarcoma prognosisuterine sarcoma prognosissynovial sarcoma prognosismyeloid sarcoma prognosisewing sarcoma prognosismyxoid sarcoma prognosis