sarcoma lung cancer prognosissarcoma prognosismetastatic sarcoma prognosisbreast sarcoma prognosisretroperitoneal sarcoma prognosisabdominal sarcoma prognosisepithelioid sarcoma prognosisbladder sarcoma prognosispleomorphic sarcoma prognosisuterine sarcoma prognosismyeloid sarcoma prognosissynovial sarcoma prognosis