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Radiation before chemo: a new strategy to fight High-Risk breast cancer?

NCT ID NCT03978663

Disease control Sponsor: London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This trial is testing whether giving a small dose of targeted radiation to a part of the breast tumor before standard chemotherapy can help the immune system fight the cancer more effectively. The study includes 40 people with high-risk or locally advanced breast cancer. After radiation, participants receive standard chemotherapy and surgery, and researchers will check if the tumor disappears completely.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
stereotactic radiation therapy
What this could lead to
If it works, this could point toward a more effective treatment approach for high-risk breast cancer by using radiation to prime the immune system before chemotherapy.
What could go wrong
This is a small early-phase trial with only 40 participants, so results may not apply to all patients. The added radiation could cause side effects, and the benefit over standard care is not yet proven.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 40 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2020

Expected to finish

Jul 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Any biopsy-proven locally advanced breast cancer patient defined as Stages IIB-III (excluding inflammatory breast cancer). Stage IIA is eligible for triple negative and HER2-positive breast cancers 2. Invasive mammary carcinoma of any subtype excluding lobular, sarcomatous, or metaplastic subtypes, or with lobular features 3. Plan to be treated with neoadjuvant chemotherapy 4. Able to fit in/have MRI 5. 18 years of age or older 6. Able to tolerate core needle biopsies 7. Able to provide informed consent 8. No evidence of metastatic disease Exclusion Criteria: 1. Any serious medical comorbidities or other contraindications to radiotherapy, chemotherapy, or surgery 2. Prior treatment for current breast cancer 3. Previous radiation therapy to the same breast 4. Inflammatory breast carcinoma 5. Invasive lobular carcinoma or invasive mammary carcinoma with lobular, sarcomatous, or metaplastic subtypes, or with lobular features 6. Recurrent breast cancer 7. Bilateral breast cancer 8. Evidence of distant metastatic disease 9. Collagen vascular disease (particularly lupus, scleroderma, dermatomyositis, psoriatic arthritis) 10. Any other malignancy at any site (except non-melanomatous skin cancer) \<5 years prior to study enrollment 11. Inability to lay prone with arms above the head for extended periods of time 12. Inability to fit in/have an MRI 13. Inability to tolerate core needle biopsies 14. Pregnant or lactating 15. Under 18 years of age 16. Inability or unwillingness to provide informed consent

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Conditions

The condition(s) this trial relates to.

breast cancer HER2 positive breast carcinoma triple-negative breast carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

High-risk cancer Locally advanced breast cancer

Contacts and locations

Locations

  • London Regional Cancer Program

    London, Ontario, Canada

More trials for these conditions

Other studies related to the condition(s) this trial covers.