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Scientists map genetic landscape of HER2-Low breast cancer to unlock survival clues

NCT ID NCT05466786

Knowledge-focused Sponsor: Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This observational study looks at 255 women with HER2-low breast cancer to understand how certain gene changes (HRD/HRR) relate to survival. Researchers will analyze tumor and blood samples to map these genetic features. The goal is to learn more about this cancer type, not to test a new treatment.

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

About 255 people

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

Started

Aug 2022

Expected to finish

May 2027

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.

Who is studied

Female patients aged 18-70 years with pathologically confirmed HER2-low breast cancer (defined as IHC 2+/ISH- or IHC 1+ per ASCO/CAP guidelines)

Ages

18 to 70 years

Sex

Female participants only

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: 1. Female patients aged 18-70 years with pathologically confirmed HER2-low breast cancer (defined as IHC 2+/ISH- or IHC 1+ per ASCO/CAP guidelines); 2. ECOG performance status of 0 or 1; 3. Treatment-naïve operable primary breast cancer with completed homologous recombination deficiency (HRD) assessment; 5）Absence of distant metastasis; 6）Availability of adequate tumor tissue and blood samples for biomarker analysis. Exclusion Criteria: 1. Recurrent or inoperable locally advanced breast cancer; 2. Bilateral breast cancer; 3. History of other malignant tumors within the past 5 years; 4. Incomplete clinical or pathological data.

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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.

Breast cancer HER2 low 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

    1 site. 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

  • Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University

    RECRUITING

    Guangzhou, Guangdong, 510120, China

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