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Breast cancer survivors tracked for decades in global registry

NCT ID NCT05739591

Knowledge-focused Sponsor: GBG Forschungs GmbH 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time

Summary

This international registry follows people who took part in GBG clinical trials for early breast cancer, collecting health information long after those trials end. Researchers track survival, late side effects, and issues related to pregnancy, fertility, and quality of life. The goal is to understand how breast cancer treatments affect people over many years.

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 the registry succeeds, doctors could better understand the long-term safety and effectiveness of breast cancer treatments and how they affect fertility, pregnancy, and quality of life years later.
What could go wrong
This is an observational registry, so it cannot prove that any treatment causes a particular outcome. Results depend on participants staying enrolled and reporting information over many years, and people who drop out may leave gaps in the data.

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 400 people

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

Started

Oct 2022

Expected to finish

May 2030

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

Patients who participated and received treatment as part of a GBG clinical trial for early breast cancer.

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: * Participation and treatment in a GBG clinical trial for early breast cancer. * Prospective registration: Written informed consent according to local regulatory requirements prior to data and biomaterial collection. Exclusion criteria: * Participation and treatment in a non-GBG clinical trial for early breast cancer. * Patients with advanced or metastatic breast cancer who have participated and received treatment in a GBG clinical trial.

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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

How to take part

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

  1. The places running it

    23 sites in 2 countries. 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

  • Fundació IRB Lleida, Oncología, Unidad de ensayos clínicos

    RECRUITING

    Lleida, Catalonia, 25198, Spain

  • Fundación Instituto Valenciano de Oncología (IVO)

    RECRUITING

    Valencia, Valencia, 46009, Spain

  • H. Santa Creu I Sant Pau

    RECRUITING

    Barcelona, Catalonia, 8041, Spain

  • Hospital Clinic i Provincial de Barcelona

    RECRUITING

    Barcelona, Catalonia, 8036, Spain

  • Hospital Germans Trias i Pujol

    RECRUITING

    Badalona, Catalonia, 8916, Spain

  • Hospital Parc Tauli

    RECRUITING

    Sabadell, Catalonia, 8208, Spain

  • Hospital Reina Sofia, Servicio Oncología Planta sotano

    RECRUITING

    Córdoba, Andalusia, 14004, Spain

  • Hospital San Pedro de Alcantara

    RECRUITING

    Cáceres, Extremadura, 10003, Spain

  • Hospital Universitari Vall d´Hebron, Servicio de Oncologia Medica

    RECRUITING

    Barcelona, Catalonia, 8035, Spain

  • Hospital Universitario Basurto, Servicio de Oncología médica

    RECRUITING

    Bilbao, Basque Country, 48013, Spain

  • Hospital Universitario Clínico San Carlos, Servicio de Oncología Médica

    RECRUITING

    Madrid, Madrid, 28040, Spain

  • Hospital Universitario Infanta Cristina, Centro de Investigacíon Clinica e Área de Sal

    RECRUITING

    Badajoz, 6007, Spain

  • Hospital Universitario Ramon y Cajal, Servicio de Oncología Médica/ Oficina de Ensayos Clínicos

    RECRUITING

    Madrid, Madrid, 28034, Spain

  • Hospital Universitario Virgen der Rocio

    RECRUITING

    Seville, 41013, Spain

  • Hospital Universitario de Canarias

    RECRUITING

    Santa Cruz de Tenerife, Canary Islands, 38320, Spain

  • Klinik Hietzing Wien

    RECRUITING

    Vienna, 1130, Austria

  • Klinikum Wels-Grieskirchen GmbH

    RECRUITING

    Wels, Upper Austria, 4600, Austria

  • LKH Salzburg - PMU

    RECRUITING

    Salzburg, 5020, Austria

  • MedUni Graz - Med. Universitätsklinik, Klinische Abteilung für Onkologie

    RECRUITING

    Graz, 8036, Austria

  • MedUni Graz - Universitätsklinik für Frauenheilkunde und Geburtshilfe

    RECRUITING

    Graz, 8036, Austria

  • Medical University of Vienna, Brustambulanz AKH Wien

    RECRUITING

    Vienna, 1090, Austria

  • Ordensklinikum Linz GmbH - BHS

    RECRUITING

    Linz, 4010, Austria

  • Universitätsklinikum Innsbruck, Klinische Abteilung f. Gynäkologie und Geburt

    RECRUITING

    Innsbruck, Triol, 6020, Austria

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