Pembrolizumab, Endocrine Therapy, and Palbociclib in Treating Postmenopausal Patients With Newly Diagnosed Metastatic Stage IV Estrogen Receptor Positive Breast Cancer
Public ClinicalTrials.gov record NCT02778685. 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
Phase II Study of the Combination of Pembrolizumab, Letrozole, and Palbociclib in Postmenopausal Patients With Newly Diagnosed Metastatic Estrogen Receptor Positive Breast Cancer
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This phase II trial studies how well pembrolizumab works when given together with endocrine therapy and palbociclib in treating postmenopausal patients with newly diagnosed stage IV estrogen receptor positive breast cancer that has spread to other parts of the body (metastatic). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Estrogen can cause the growth of breast cancer cells. Fulvestrant blocks the use of estrogen by the tumor cells. Letrozole lowers the amount of estrogen made by the body. This may help stop the growth of tumor cells that need estrogen to grow. Palbociclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving pembrolizumab, palbociclib, and letrozole or fulvestrant may be an effective treatment for patients with stage IV estrogen receptor positive breast cancer.
Study identification
- NCT ID
- NCT02778685
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 47 participants
Conditions and interventions
Interventions
- Fulvestrant Drug
- Laboratory Biomarker Analysis Other
- Letrozole Drug
- Palbociclib Drug
- Pembrolizumab Biological
Drug · Other · Biological
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- Female
- 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
- Sep 29, 2016
- Primary completion
- Oct 30, 2025
- Completion
- Mar 29, 2026
- Last update posted
- Feb 23, 2026
2016 – 2026
United States locations
- U.S. sites
- 7
- U.S. states
- 1
- U.S. cities
- 7
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| City of Hope Corona | Corona | California | 92879 | — |
| City of Hope Medical Center | Duarte | California | 91010 | — |
| City of Hope Antelope Valley | Lancaster | California | 93534 | — |
| City of Hope Mission Hills | Mission Hills | California | 91345 | — |
| City of Hope South Pasadena | South Pasadena | California | 91030 | — |
| City of Hope Upland | Upland | California | 91786 | — |
| City of Hope West Covina | West Covina | California | 91790 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT02778685, 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 Feb 23, 2026 · Synced Sep 26, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT02778685 live on ClinicalTrials.gov.