Surgery With or Without Radiation Therapy in Untreated Nonmetastatic Retroperitoneal Sarcoma — STRASS  

Sarcoma Clinical Trial

Official title: A Phase III Randomized Study of Preoperative Radiotherapy Plus Surgery Versus Surgery Alone for Patients With Retroperitoneal Sarcoma (RPS)

Status Completed

Clinical Trial Summary

RATIONALE: Radiation therapy uses high-energy x-rays to kill tumor cells. Giving radiation therapy before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed. It is not yet known whether surgery is more effective with or without radiation therapy in treating nonmetastatic retroperitoneal soft tissue sarcoma.

PURPOSE: This randomized phase III trial is studying radiation therapy followed by surgery to see how well it works compared with surgery alone in treating patients with previously untreated nonmetastatic retroperitoneal soft tissue sarcoma.

Clinical Trial Description

OBJECTIVES:

Primary

• To assess whether there is a difference in abdominal recurrence-free survival between retroperitoneal soft tissue sarcoma patients undergoing curative intent surgery alone and those undergoing preoperative radiotherapy followed by curative-intent surgery.

Secondary

• To assess whether there is a difference in metastasis-free survival, abdominal recurrence-free interval, and overall survival between these patients.

• To assess tumor response in patients undergoing preoperative radiotherapy.

• To assess toxicity of preoperative radiotherapy given prior to curative-intent surgery in these patients.

OUTLINE: This is a multicenter study. Patients are stratified according to institution and WHO performance status (0-1 vs 2). Patients are randomized to 1 of 2 treatment arms.

• Arm I: Patients undergo surgical resection of the tumor mass within 4 weeks following randomization.

• Arm II: Patients undergo 3-dimensional conformal radiation therapy (RT) or intensity-modulated RT within 8 weeks after randomization. RT continues 5 days a week for approximately 5.5 weeks. Patients undergo surgical resection of the tumor mass within 4-8 weeks after the completion of RT.

Tumor tissue, normal abdominal wall fat, and peripheral blood may be collected during surgery to identify new prognostic factors for translational research.

After completion of study therapy, patients are followed at day 60 post-surgery and every 6 months thereafter. ;

Related Conditions & MeSH terms

• Sarcoma

• NCT number: NCT01344018
• Study type: Interventional
• Source: European Organisation for Research and Treatment of Cancer - EORTC
• Status: Completed
• Phase: N/A
• Start date: January 2012
• Completion date: March 2019