Smart scan may help choose best breast cancer therapy

NCT ID NCT06195709

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study tests whether a special PET scan (EstroTEP) and blood tests can help doctors pick the best second-line treatment for people with ER-positive, HER2-negative metastatic breast cancer. About 300 participants will be assigned to either endocrine therapy or chemotherapy based on these test results. The goal is to see if this personalized approach improves how long the cancer stays under control.

What this could mean

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

Active substance
18F-FES (a radioactive tracer for PET scans) and circulating tumor biomarkers
What this could lead to
If successful, this approach could help doctors choose the most effective second-line therapy for each patient, potentially improving outcomes and avoiding ineffective treatments.
What could go wrong
This is a strategy trial, not testing a new drug. The benefit depends on how well the scan and biomarkers predict treatment response, which is still uncertain. Results may not apply to all patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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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.

Contacts and locations

Locations

  • Bruno MAUCHERAT

    WITHDRAWN

    Saint-Herblain, 44805, France

  • CHU Limoges

    NOT_YET_RECRUITING

    Limoges, 87000, France

  • Centre Antoine lacassagne

    RECRUITING

    Nice, 06189, France

  • Centre Eugène Marquis

    RECRUITING

    Rennes, 35042, France

  • Centre Francois Baclesse

    RECRUITING

    Caen, 14076, France

  • Centre Georges Francois Leclerc

    RECRUITING

    Dijon, 21079, France

  • Centre Henri Becquerel

    NOT_YET_RECRUITING

    Rouen, 76038, France

  • Centre Hospitalier de la Côte basque

    NOT_YET_RECRUITING

    Bayonne, 64100, France

  • Centre Leon Bérard

    NOT_YET_RECRUITING

    Lyon, 69008, France

  • Centre Oscar Lambret

    RECRUITING

    Lille, 59000, France

  • Centre de lutte contre le cancer Paul Strauss

    NOT_YET_RECRUITING

    Strasbourg, France

  • Hôpital Bretonneau-CHU Tours

    NOT_YET_RECRUITING

    Tours, 37044, France

  • Hôpital Universitaire de Nimes

    NOT_YET_RECRUITING

    Nîmes, 30029, France

  • Institut Bergonié

    NOT_YET_RECRUITING

    Bordeaux, 33076, France

  • Institut Curie

    RECRUITING

    Paris, 75005, France

  • Institut Curie

    RECRUITING

    Saint-Cloud, 92210, France

  • Institut Paoli-Calmettes

    RECRUITING

    Marseille, 13009, France

  • Institut de Cancerologie de Lorraine

    RECRUITING

    Vandœuvre-lès-Nancy, 54519, France

  • Institut du Cancer Montpellier

    RECRUITING

    Montpellier, 34298, France

  • Oncopole Claudius Regaud

    NOT_YET_RECRUITING

    Toulouse, 31059, France

  • Polyclinique Bordeaux Nord Aquitaine

    NOT_YET_RECRUITING

    Bordeaux, 33077, France

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