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New breast cancer pill tested against standard drug in Pre-Surgery study

NCT ID NCT04191382

Terminated Disease control Sponsor: Sanofi Source: ClinicalTrials.gov ↗

First seen Nov 01, 2025 · Last updated May 13, 2026 · Updated 23 times

Summary

This study tested two different doses of a new drug called amcenestrant against the standard drug letrozole in postmenopausal women with early-stage, hormone-receptor-positive breast cancer. The goal was to see if amcenestrant could better slow tumor growth before surgery. The study was terminated early, and results are not fully available.

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Contacts and locations

Locations

  • Investigational Site Number 0560001

    Leuven, 3000, Belgium

  • Investigational Site Number 0560002

    Namur, 5000, Belgium

  • Investigational Site Number 2500001

    Nantes, 44093, France

  • Investigational Site Number 2500002

    Saint-Cloud, 92210, France

  • Investigational Site Number 2500003

    Toulouse, 31059, France

  • Investigational Site Number 2500004

    Paris, 75010, France

  • Investigational Site Number 3800001

    Milan, 20141, Italy

  • Investigational Site Number 3800002

    Milan, 20132, Italy

  • Investigational Site Number 3800004

    Meldola, 47014, Italy

  • Investigational Site Number 3920001

    Yokohama, Japan

  • Investigational Site Number 3920002

    Osaka, Japan

  • Investigational Site Number 3920003

    Sapporo, Japan

  • Investigational Site Number 6430002

    Saint Petersburg, 197758, Russia

  • Investigational Site Number 6430003

    Saint Petersburg, 194156, Russia

  • Investigational Site Number 6430004

    Moscow, 119991, Russia

  • Investigational Site Number 6430006

    Moscow, 117186, Russia

  • Investigational Site Number 6430007

    Saint Petersburg, 195271, Russia

  • Investigational Site Number 7240001

    Madrid, 28041, Spain

  • Investigational Site Number 7240002

    Valencia, 46010, Spain

  • Investigational Site Number 7240003

    Córdoba, 14004, Spain

  • Investigational Site Number 7240005

    Barcelona, 08003, Spain

  • Investigational Site Number 8040001

    Uzhhorod, 88000, Ukraine

  • Investigational Site Number 8040002

    Vinnytsia, 21029, Ukraine

  • Investigational Site Number 8040004

    Kharkiv, 61166, Ukraine

  • Investigational Site Number 8040005

    Zaporizhzhya, 69040, Ukraine

  • Investigational Site Number 8400005

    Lincoln, Nebraska, 68506, United States

  • Investigational Site Number 8400007

    Hato Rey, 00917, Puerto Rico

  • Investigational Site Number 8400010

    Los Angeles, California, 90095, United States

  • Investigational Site Number 8400012

    Tacoma, Washington, 98405, United States

  • Investigational Site Number 8400014

    Tucson, Arizona, 85724, United States

  • Investigational Site Number 8400016

    Winston-Salem, North Carolina, 27157, United States

  • Investigational Site Number 8400018

    Fort Wayne, Indiana, 46804, United States

Conditions

Explore the condition pages connected to this study.

BREAST CANCER