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A study looking at the timing of surgery during hormone therapy for breast cancer (EndoNET)

Overview

Cancer types:

Breast cancer

Status:

Open

Phase:

Phase 3

Details

This study is looking at hormone therapy before surgery to help shrink breast cancer.

It is for women who:

  • have a high number of oestrogen receptors on their breast cancer cells ()

  • need both hormone therapy and surgery

  • have been through the

Recruitment start: 23 August 2022

Recruitment end: 30 November 2027

How to join

Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.

Chief investigators

Professor Michael Douek

Supported by

NIHR Health Technology Assessment (HTA) programme

NIHR Efficacy and Mechanism Evaluation (EME) Programme

University of Oxford

University of Southampton

University of Bristol

Last reviewed: 30 Jun 2026

CRUK internal database number: 19954

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