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Which lymph node surgery works best after breast cancer chemotherapy?
NCT ID NCT04373655
First seen Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time
Summary
Researchers are comparing three ways to check lymph nodes after chemotherapy in people with breast cancer that had spread to the lymph nodes but turned negative with treatment. The study follows 3,000 patients across multiple countries who receive either full lymph node removal, sentinel node biopsy, or targeted axillary dissection. The goal is to see which method is safest, most accurate, and causes the fewest side effects like arm swelling.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If one method proves safer and more accurate, doctors could standardize how they check lymph nodes after chemotherapy, sparing some women more extensive surgery.
- What could go wrong
- This is an observational study, not a randomized trial, so differences between methods may reflect which patients received which procedure rather than the procedures themselves. Results may not apply everywhere.
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.
- Participants
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About 3,000 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2020
- Expected to finish
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Apr 2030
An estimate. End dates often move.
- Lead sponsor
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A research network
The lead sponsor is a research network or cooperative group.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Breast cancer patients with lymph node metastasis undergoing neoadjuvat chemotherapy.
- 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.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Signed informed consent form * Primary invasive breast cancer (confirmed by core biopsy) * cN+ * cT1-4c * Scheduled for neoadjuvant systemic therapy * Female / male patients ≥ 18 years old Exclusion criteria * Distant metastasis * Recurrent breast cancer * Inflammatory breast cancer * Extramammary breast cancer * Supraclavicular lymph node metastasis * Pregnancy * Less than 4 cycles of NACT administered * Patients not suitable for surgical treatment
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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 study's own enquiry address
This study publishes an address for enquiries. See it below .
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The places running it
1 site. 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
Show contact details
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Study contacts
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Contact
Email: •••••@•••••
Locations
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Klinikum Esslingen
RECRUITINGEsslingen am Neckar, Germany
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