Ultra-Hypofractionated vs. Hypofractionated Radiation for Node-Positive Breast Cancer
Public ClinicalTrials.gov record NCT06559540. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
SWIFT RT: Ultra-Hypofractionated vs. Hypofractionated Radiation for Node-Positive Breast Cancer
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
In breast cancer patients with nodal involvement, numerous studies have demonstrated that adjuvant radiation therapy reduces the risk of local recurrence, regional recurrence, and distant metastases, in addition to improving survival. The dose and fractionation for adjuvant breast radiation therapy has evolved over time, as novel schedules have been compared to the current standard of care. Hypofractionated radiation therapy (266 cGy per fraction x 15-16 fractions over 3 weeks) has been shown to result in equivalent oncologic outcomes, as well as equivalent acute and late toxicity, when compared to standard fractionation (200 cGy per fraction x 25 fractions over 5 weeks). Subsequently, hypofractionated breast radiation has become the current standard of care. More recently, ultra-hypofractionated breast radiation (520 cGy per fraction x 5 fractions over 1 week) was shown in a randomized trial to be non-inferior to hypofractionated radiation when treating the breast after lumpectomy. However, the efficacy and toxicity of using ultra-hypofractionated radiation therapy when also treating the regional nodes has not been reported. This is important, as there is greater radiation exposure to several normal tissues, such as the arm/shoulder, brachial plexus, normal lymphatics, heart, and lung, when treating the regional nodes. In this randomized study, the investigators aim to compare the tolerability and efficacy of ultra-hypofractionated breast/chest wall and regional nodal radiation (SWIFT RT) against hypofractionated radiation (RT). The investigators will evaluate acute and late toxicity, oncologic outcomes (including local recurrence, regional recurrence, distant metastasis, and overall survival), cosmesis, and patient-reported quality of life. The investigators will collect blood samples for correlative studies of biomarkers of fibrosis and cardiac toxicity.
Study identification
- NCT ID
- NCT06559540
- Recruitment status
- Recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 220 participants
Conditions and interventions
Conditions
Interventions
- Hypofractionated radiation Radiation
- Ultra-hypofractionated breast/chest wall and regional nodal radiation Radiation
Radiation
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- Female
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 26, 2024
- Primary completion
- Apr 29, 2034
- Completion
- Apr 29, 2034
- Last update posted
- Jan 8, 2026
2024 – 2034
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Washington University School of Medicine | St Louis | Missouri | 63110 | Recruiting |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT06559540, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 8, 2026 · Synced Sep 7, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT06559540 live on ClinicalTrials.gov.