Could less surgery be just as good for breast cancer patients?
NCT ID NCT06869629
First seen Jun 27, 2026 · Last updated Aug 18, 2026 · Updated 2 times
Summary
This study looks at women with breast cancer that has spread to lymph nodes under the arm, found before surgery. Normally, doctors remove many lymph nodes, which can cause arm swelling and pain. The trial tests if removing only the first few affected nodes is just as effective for survival, with fewer side effects. About 1,380 participants will be followed to compare outcomes.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 1,380 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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Dec 2041
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Patients with primary invasive breast cancer clinical stage II-III * Palpable or non-palpable axillary metastases visible by ultrasound (other imaging accepted if confirmatory ultrasound is performed) and confirmed by fine needle aspiration or core biopsy * Written informed consent * Age ≥ 18 years Exclusion Criteria: * Distant metastases * Ipsilateral metastases in internal mammary, infra- or supraclavicular lymph nodes without confirmed axillary nodal involvement * Preoperative suspicion of extensive nodal involvement, i.e. locally advanced disease * Nodes fixed to each other or to neighbouring structures on palpation or imaging * History of contralateral invasive breast cancer within 5 years * Bilateral invasive breast cancer if (i) one side meets any exclusion criteria or (ii) both sides meet all inclusion criteria * Pregnancy * Neoadjuvant systemic treatment (short course of neoadjuvant endocrine therapy \<three months is allowed) * Medical contraindications for or expressed preoperative wish to abstain from radiotherapy or the recommended adjuvant systemic treatment which complies with standard of care, taking age and comorbidity into consideration * Inability to absorb or understand the meaning of the study information; for example, through disability, inadequate language skills or dementia
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
4 sites in 3 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Helsinki University Hospital
RECRUITINGHelsinki, Finland
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Samsung Medical Center
RECRUITINGSeoul, South Korea
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Skåne University Hospital
RECRUITINGMalmö, Sweden
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Örebro University Hospital
RECRUITINGÖrebro, Sweden
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Other studies related to the condition(s) this trial covers.
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