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Can surgery and radiation tame spread of HER2+ breast cancer?

NCT ID NCT07053085

Disease control Sponsor: Memorial Sloan Kettering Cancer Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether adding surgery and targeted radiation to standard treatment helps people with HER2-positive breast cancer that has spread to up to 5 spots in the body. About 178 adults will be randomly assigned to receive either standard care alone or standard care plus surgery and radiation. The goal is to see if the combination delays cancer progression.

What this could mean

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

Active substance
surgery (lumpectomy or mastectomy) and radiation therapy (locoregional radiation and stereotactic body radiation therapy)
What this could lead to
If successful, this approach could become a new standard to control or delay progression of HER2-positive breast cancer that has spread to a few spots in the body.
What could go wrong
This is a phase II trial with 178 participants, so results are still preliminary. Adding surgery and radiation may not improve outcomes and could increase side effects.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 178 people

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

Started

Sep 2025

Expected to finish

Sep 2029

An estimate. End dates often move.

Lead sponsor

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

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. * Pathologically-confirmed metastatic breast cancer. * Oligometastatic breast cancer (≤5 discrete metastatic lesions) without CNS involvement; as seen on standard imaging during initial workup and monitoring prior to registration. * HER2-positive breast cancer per CAP/ASCO guidelines as determined by staff pathologist (any estrogen or progesterone receptor status). * Based on size and location, all metastatic sites can be safely treated with either SBRT or resection. * Enrolled at least 3 months (and up to 12 months) after initiation of first-line systemic therapy AND without evidence of progression as determined by treating clinician (whether clinically or radiographically) during this window. (ie. in the judgement of the treating clinician, based on standard evaluations, all known disease must be controlled prior to enrollment). * ECOG performance status 0-2; KPS 60-100 Exclusion Criteria: * Any foci of disease progression during initial 3-12 months of first-line systemic therapy (as determined by treating clinician) * Escalation of systemic therapy line due to progressive disease (i.e. initiated second-line therapy prior to enrollment). * Comorbidities precluding receipt of radiotherapy, surgery or standard systemic therapy. * Intracranial or intrathecal/intramedullary spinal disease (ie. CNS involvement is excluded from the study; epidural/vertebral disease is permitted) * Prior cancer history requiring chemotherapy within the past 10 years (ie. prior cancers are permitted provided no chemotherapy was administered). Inclusion of Underrepresented Populations * Individuals of all races and ethnic groups are eligible for this trial. There is no bias towards age or race in the clinical trial outlined. This trial is open to the accrual of men and women.

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Conditions

The condition(s) this trial relates to.

breast cancer breast carcinoma breast neoplasm HER2 positive breast carcinoma

As listed by the trial registrant

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

HER2-positive breast cancer Metastatic 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

    7 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

  • Memorial Sloan Kettering Bergen (Limited Protocol Activities)

    RECRUITING

    Montvale, New Jersey, 07645, United States

  • Memorial Sloan Kettering Cancer Center (All protocol activites)

    RECRUITING

    New York, New York, 10065, United States

  • Memorial Sloan Kettering Monmouth (Limited Protocol Activities)

    RECRUITING

    Middletown, New Jersey, 07748, United States

  • Memorial Sloan Kettering Nassau (Limited protocol activities)

    RECRUITING

    Rockville Centre, New York, 11553, United States

  • Memorial Sloan Kettering Suffolk-Commack (Limited Protocol Activities )

    RECRUITING

    Commack, New York, 11725, United States

  • Memorial Sloan Kettering Westchester (Limited Protocol Activities)

    RECRUITING

    Harrison, New York, 10604, United States

  • Memorial Sloan Kettering at Basking Ridge (Limited Protocol Activities)

    RECRUITING

    Basking Ridge, New Jersey, 07920, United States

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