CINSARC Signature and Correlation With Hemotherapy Efficacy in Soft-tissue Sarcomas. A Biomarker Study.

"Procedure/Surgery: Newly obtained biopsy if applicable and Blood samples collection.~For each patient:~* Frozen and paraffin embedded tumor material (archival or new biopsy) will be obtained for genetic profiling~* Blood samples will be obtained for genetic profiling and assessment of markers.~The classification as CINSARC will be performed for each patient. Patients should be treated by neoadjuvant anthracycline-based chemotherapy. Chemotherapy regimen must contain at least doxorubicin (dose range: 60 -75 mg/m²) and ifosfamide (dose range: 2.5-3g/m²) to be delivered on a 21-days cycle basis up to 6 cycles prior surgery. After neoadjuvant chemotherapy completion, patients will be treated by surgery followed or not by radiotherapy.~All patients should be managed according to the usual medical practices."