| SR7 (EORTC 1809-STBSG) | A Randomized Phase III Study of Neoadjuvant Chemotherapy Followed by Surgery versus Surgery Alone for Patients with High Risk RetroPeritoneal Sarcoma (STRASS 2) This is a randomized, multicentre, open-label phase III trial of neoadjuvant chemotherapy followed by surgery versus surgery alone in patients with RPS. The randomization will be stratified by institution and histology: liposarcoma LPS or leyomiosarcoma (LMS). Patients will be randomized to either Standard arm: large en-bloc curative intent surgery or Experimental arm: 3 cycles of neoadjuvant chemotherapy followed by curative intent surgery. The primary endpoint of the study is disease free survival which includes as events: distant progression on neoadjuvant treatment, local progression if not followed by R0/R1 surgery, non-operable tumours, local recurrence and/or distant metastases, R2 and death.
Complexity Level: 2
Eligibility: Histologically proven primary high risk leiomyosarcoma (LMS) or Liposarcoma (LPS) of retroperitoneal space or infra-peritoneal spaces of pelvis, unifocal resectable tumour, radiologically measurable disease (RECIST 1.1), 18 years old or older, WHO ps 0-2, adequate haematological and organ function, ASA < 3, negative serum pregnancy test, consent to use highly effective birth control measures throughout duration of study and for at least 6 months after last treatment. No sarcoma originating from bone structure, abdominal or gynecological viscera, no metastatic disease, no previous treatment to present tumour, no hypersensitivity to doxorubicin, ifosfamide, dacarbazine or any of their metabolites/excipients, no recent or uncontrolled cardiac disease, no active or uncontrolled infections, and/or no live vaccines within 30 days of study entry.
Objectives: The primary objective of this study is to assess whether preoperative chemotherapy, as an adjunct to curative-intent surgery, improves the prognosis of patients with high risk de-differentiated liposarcoma (DDLPS) and leiomyosarcoma (LMS) as measured by disease-free survival.
NCT Registration ID (from clinicaltrials.gov): NCT04031677
Participation: Open to member centres
NCI US Affiliation: No
Clinical Trials Application (Canada): No
Coordination: Intergroup Led Trial
Status: Open to Accrual
Activation Date: February 01, 2021
Chair: (Canada) Dr. Rebecca Gladdy, Sinai Health System, (416) 586-8440
| Open to Accrual |
