Breast cancer breakthrough: thousands may avoid unnecessary surgery
NCT ID NCT04303715
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether women with small breast cancers (under 5 cm) and no signs of cancer in their lymph nodes on ultrasound can safely skip sentinel lymph node biopsy during breast-conserving surgery. About 1,734 women are being randomly assigned to either have the biopsy or not, and researchers will track cancer recurrence and survival over time. The goal is to reduce unnecessary surgery and side effects without harming outcomes.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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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.
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Locations
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Seoul National University Hospital
Seoul, Seoul, 03080, South Korea