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RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells. Giving radiation therapy before surgery may shrink the tumor so that it can be removed. It is not yet known whether surgery is more effective with or without radiation therapy.
PURPOSE: This randomized phase III trial is studying surgery alone to see how well it works compared to radiation therapy together with surgery in treating patients with primary soft tissue sarcoma of the retroperitoneum or pelvis.
- Compare progression-free survival of patients with primary soft tissue sarcoma of the retroperitoneum or pelvis treated with surgery with vs without preoperative radiotherapy.
- Compare the toxicity and complications associated with these regimens in these patients.
- Compare the rate of microscopically complete surgical resection in patients treated with these regimens.
- Compare the overall survival rate of patients treated with these regimens.
OUTLINE: This is a randomized, multicenter study. Patients are stratified according to tumor grade (low [G1] vs intermediate [G2] vs high [G3/4]), tumor size (< 15 cm vs ≥ 15 cm), and tumor histology (liposarcoma vs non-liposarcoma). Patients are randomized to 1 of 2 treatment arms.
- Arm I: Patients undergo surgery.
- Arm II: Patients undergo preoperative radiotherapy once daily, 5 days a week, for 5.5 weeks. Within 28-63 days after the completion of radiotherapy, patients undergo surgery.
In both arms, treatment continues in the absence of disease progression or unacceptable toxicity.
Patients are followed at 28 days, 4 months, every 6 months for 5 years, and then annually for 5 years.
PROJECTED ACCRUAL: A total of 370 patients (185 per treatment arm) will be accrued for this study within 4.5 years.
Allocation: Randomized, Control: Active Control, Primary Purpose: Treatment
conventional surgery, neoadjuvant therapy, radiation therapy
Arkansas Cancer Research Center at University of Arkansas for Medical Sciences
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:54:04-0400
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