BreastVAX: Radiation Boost to Enhance Immune Checkpoint Blockade Therapy
Public ClinicalTrials.gov record NCT04454528. 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
Preoperative Use of Radiation Boost to Enhance Effectiveness of Immune Checkpoint Blockade Therapy in Operable Breast Cancer
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The primary objective is to determine the feasibility of combining pembrolizumab with a single fraction radiation boost in patients with early/ operable breast cancer. The secondary objectives are to assess clinical response on pre- and post-treatment clinical, imaging, and histology exams, and to assess immune response on pre and post treatment blood and tissue samples by tracking change in Ki67 + CD8 T cells in peripheral blood and in extent of tumor infiltrating lymphocytes. A clinically significant partial response is defined as \>30% tumor shrinkage post-clinical trial intervention.
Study identification
- NCT ID
- NCT04454528
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 1, Phase 2
- Enrollment
- 27 participants
Conditions and interventions
Conditions
Interventions
- Hypofractionated radiotherapy Radiation
- Pembrolizumab infusion Drug
- Blood and tissue sampling Procedure
Radiation · Drug · Procedure
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
- Dec 6, 2020
- Primary completion
- Jul 31, 2026
- Completion
- Jul 31, 2027
- Last update posted
- Mar 9, 2026
2020 – 2027
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Perelman Center for Advanced Medicine | Philadelphia | Pennsylvania | 19104 | — |
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 NCT04454528, 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 9, 2026 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04454528 live on ClinicalTrials.gov.