Study of Exosomes in Monitoring Patients With Sarcoma (EXOSARC)

"Localized sarcoma group : 1 blood sample during inclusion (7 ml) + 1 blood sample before surgery (32 ml) + 1 blood sample 1 month after surgery (32 ml) + 1 blood sample 3 month after surgery (32 ml) + 1 blood sample 6 month after surgery (32 ml)~Metastatic sarcoma group : 1 blood sample during inclusion (7 ml) + 1 blood sample during chemotherapy cure 1 (32 ml) + 1 blood sample during chemotherapy cure 3 (32 ml) + 1 blood sample during chemotherapy cure 6 (32 ml)"