NCT02295033

Randomized Boost Versus no Boost Irradiation of Early Breast Cancer

Phase III Study in the Conservative Management of Breast Carcinoma by Tumorectomy and Radiotherapy: Assessment of the Role of a Booster Dose of Radiotherapy (Joint Study of the European Organisation for Research and Treatment of Cancer Radiotherapy Cooperative Group and Breast Cancer Cooperative Group)

• Status: Completed
• Phase: Phase 3
• Study type: Interventional
• Enrollment: —
• Sponsor: European Organisation for Research and Treatment of Cancer - EORTC · Network
• Sex: Female
• Age: 70 Years
• Healthy volunteers: Not accepted

Summary

Radiation therapy may kill any tumor cells remaining after surgery. This randomized phase III trial is studying the effect of an extra dose of radiation therapy (Boost dose) after breast conserving surgery and 50 Gy adjuvant external beam radiotherapy to see how well it works compared to no further therapy in treating women with early breast cancer that has been surgically removed.

Detailed description

This is a randomized study. Patients are stratified by participating institution, menopausal status, clinical tumor size, nodal status, presence of Ductal Carcinoma In Situ, age, and resection margin status. The objective of this trial is to assess the local recurrence rate and the cosmetic result in women who have had conservative resection of small breast cancers and who are randomly assigned after postoperative whole-breast irradiation to no boost vs. 15-16 Gy boost (patients with microscopically complete resections) or 10 Gy vs. 25-26 Gy boost (patients with microscopically incomplete resections). Following tumorectomy, all patients receive radiotherapy for 5 weeks. Patients with microscopically negative resection margins are randomized to one of 2 groups: no further radiotherapy; or a radiotherapy boost with either external-beam radiotherapy or an interstitial implant. Patients with microscopically positive resection margins are also randomized to receive either lower dose or higher dose radiotherapy boosts by external beam or interstitial implant. Patients with positive lymph nodes are encouraged to receive at least 6 courses of adjuvant or perioperative chemotherapy prior to radiotherapy provided radiotherapy is initiated within 6 months of surgery. All other patients begin radiotherapy within 9 weeks of surgery. All postmenopausal women with positive lymph nodes receive oral tamoxifen daily for 2 years.

Conditions

• Breast Cancer

Interventions

Type	Name	Description
RADIATION	Boost irradiation

Timeline

• Start date: 1989-05-01
• Primary completion: 2006-05-01
• First posted: 2014-11-19
• Last updated: 2014-11-19