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Tiny magnetic seeds could guide surgeons to the right lymph node

NCT ID NCT03796559

Diagnosis Sponsor: Endomagnetics Ltd. Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 18, 2026 · Last updated Sep 18, 2026

Summary

Researchers are testing whether a small implantable marker called Magseed, along with a handheld magnetic probe called Sentimag, can help surgeons locate and remove a specific axillary lymph node in breast cancer patients who have had chemotherapy before surgery. The study enrolls adults with biopsy-confirmed lymph node metastases who are scheduled for targeted axillary dissection. The goal is to see how often the marked node is successfully removed and to assess the safety and accuracy of the device.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Magseed marker, a tiny implantable seed that surgeons locate with the Sentimag handheld probe
What this could lead to
If it works, this approach could give surgeons a more reliable way to find the exact lymph node that had cancer after chemotherapy, which may help avoid removing more nodes than needed.
What could go wrong
This is a small, single-arm study without a comparison group, so it cannot prove the method is better than existing techniques. The marker may not be found in every case, and results may not apply to all breast cancer patients.

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

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

About 65 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2019

Expected to finish

May 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18 years or older at time of consent * Histologically confirmed cT0-4, N1 breast cancer * Axillary lymph node metastasis with pathologic confirmation by needle biopsy * Clip placed in the sampled axillary lymph node before initiation of chemotherapy * Planned for neo-adjuvant chemotherapy prior to surgical resection * Eligible for targeted axillary dissection (defined as selective localization and removal of the clipped node and SLND) at the completion of neo-adjuvant chemotherapy * ECOG performance status 0-2 Exclusion Criteria: * Distant metastases * Inflammatory breast cancer * Prior ipsilateral axillary surgical procedure including SLND or axillary node excision * Prior history of breast cancer in the ipsilateral breast * History of lymphoma * Subject is pregnant * Previous radiation to the breast or axilla * Pacemaker or other implantable cardiac device in the ipsilateral chest wall

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Axillary lymph nodes Breast cancer

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • Baylor Medicine

    RECRUITING

    Houston, Texas, 77030, United States

  • MD Anderson Cancer Center

    RECRUITING

    Houston, Texas, 77030, United States

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