Can less radiation be just as effective for early breast cancer?
NCT ID NCT07757958
First seen Aug 11, 2026 · Last updated Aug 12, 2026 · Updated 1 time
Summary
This trial is testing whether treating only part of the breast with radiation is as effective as treating the whole breast in women with early-stage, low-risk breast cancer. Participants are women aged 40 and older who had breast-conserving surgery and did not have a sentinel lymph node biopsy. The study compares recurrence rates, side effects, and quality of life between the two radiation approaches over five years.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Radiation therapy (partial breast irradiation compared to whole breast irradiation)
- What this could lead to
- If partial breast irradiation works as well as whole breast irradiation, it could offer a shorter, more targeted treatment with fewer side effects for many women with early breast cancer.
- What could go wrong
- This is a large trial, but results are not yet available. Partial breast irradiation might not control cancer as effectively as whole breast irradiation in the long term, and individual outcomes may vary.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Samsung Medical Center
Seoul, 05649, South Korea
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