A Study Evaluating the Efficacy and Safety of Giredestrant Compared With Physician's Choice of Endocrine Monotherapy in Participants With Previously Treated Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer (acelERA Breast Cancer)
Public ClinicalTrials.gov record NCT04576455. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase II, Randomized, Open-Label, Multicenter Study Evaluating the Efficacy and Safety of GDC-9545 Compared With Physician's Choice of Endocrine Monotherapy in Patients With Previously Treated Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer
Study identification
- NCT ID
- NCT04576455
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Hoffmann-La Roche
- Industry
- Enrollment
- 303 participants
Conditions and interventions
Interventions
- Fulvestrant or an Aromatase Inhibitor (Physician Choice) Drug
- Giredestrant Drug
- LHRH Agonist Drug
Drug
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 26, 2020
- Primary completion
- Feb 17, 2022
- Completion
- Aug 24, 2027
- Last update posted
- Mar 19, 2026
2020 – 2027
United States locations
- U.S. sites
- 3
- U.S. states
- 3
- U.S. cities
- 3
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Northwest Georgia Oncology Centers PC - Marietta | Marietta | Georgia | 30060 | — |
| University Hospitals Seidman Cancer Center | Cleveland | Ohio | 44106 | — |
| Northwest Cancer Specialists - Portland (SW Barnes Rd) | Tigard | Oregon | 97223 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 77 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04576455, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 19, 2026 · Synced May 19, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04576455 live on ClinicalTrials.gov.