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Could radiation before surgery be better for breast cancer?

NCT ID NCT06635980

Disease control Sponsor: Mayo Clinic Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 04, 2026 · Updated 3 times

Summary

This phase II trial is testing whether giving a shorter, stronger course of radiation before breast surgery is safer and works better than giving it after surgery for people with non-metastatic breast cancer. The study will enroll 120 participants with different breast cancer types. The goal is to see if this approach reduces side effects and improves outcomes.

What this could mean

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

Active substance
hypofractionated radiation therapy
What this could lead to
If successful, this could show that giving radiation before surgery is safer and more effective than after, potentially reducing treatment time and side effects for breast cancer patients.
What could go wrong
This is a small, early-phase trial with only 120 participants, so results may not apply to all patients. There is still a risk of radiation-related side effects, and the study is not designed to prove a cure.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 120 people

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

Started

May 2025

Expected to finish

Oct 2034

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: * Age \>= 18 years * Histological confirmation of breast cancer * Clinical stage T1-T4 N0-3 M0 * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0 to 2 * Able to and provides Institutional Review Board (IRB)-approved study specific written informed consent * Able to complete all mandatory tests listed in the trial * Willing to return to enrolling institution for follow-up (during the active monitoring phase of the study) * Indications for radiotherapy for breast cancer Exclusion Criteria: * Medical contraindication to receipt of radiotherapy * Severe active co-morbid systemic illnesses or other severe concurrent disease which, in the judgment of the investigator, would make the patient inappropriate for entry into this study or interfere significantly with the proper assessment of safety and toxicity of the prescribed regimens * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements or providing informed consent in the judgment of the principal investigator * Active systemic lupus or scleroderma * Pregnancy * Women of childbearing potential who are unwilling to employ adequate contraception * Prior receipt of ipsilateral breast or chest wall radiation * Recurrent breast cancer

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Conditions

The condition(s) this trial relates to.

breast cancer breast carcinoma breast neoplasm triple-negative breast carcinoma

As listed by the trial registrant

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

Anatomic stage I breast cancer ajcc V8 Anatomic stage II breast cancer ajcc V8 Anatomic stage III breast cancer ajcc V8 Breast carcinoma Triple-negative breast carcinoma

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    1 site. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • Mayo Clinic in Arizona

    RECRUITING

    Scottsdale, Arizona, 85259, United States

    Contact Email: •••••@•••••

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