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New study aims to find gentler radiation for breast cancer Patients' hearts

NCT ID NCT05912231

Knowledge-focused Sponsor: Massachusetts General Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares two types of radiation therapy for left-sided breast cancer: proton beam therapy and conventional photon therapy. The goal is to see which one causes fewer changes to the heart, measured by MRI scans. About 60 adults with non-metastatic breast cancer will participate. The results will help doctors choose the safest treatment for the heart.

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 60 people

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

Started

Aug 2023

Expected to finish

Dec 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: * ≥18 years of age * Non-metastatic Breast Cancer patients who are scheduled to receive conventional left-sided or bilateral breast/chest wall RT inclusive of treatment to the internal mammary lymph nodes (IMNs) * Prior chemotherapy is permitted * Ability to understand and the willingness to sign a written informed consent document * No contraindication to MRI * Patients with right-sided breast cancer or patients with left-sided patients not requiring treatment to the IMNs, but where cardiac anatomy is determined to be unfavorable by the study PI, will be considered eligible. Exclusion Criteria: * Person who is pregnant or breastfeeding. * Patients receiving any other investigational agent will not be excluded from study eligibility, unless the patient is already enrolled in an interventional study evaluating cardiac toxicity. No cytotoxic therapy or radiotherapy may be used during radiation therapy. * Contra-indication to gadolinium contrast (e.g., chronic kidney disease) * Contra-indication to radiotherapy (e.g., scleroderma, p53 mutation)

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm endomyocardial fibrosis female breast carcinoma

As listed by the trial registrant

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

Breast cancer Breast cancer female Breast cancer stage II Breast cancer stage III Myocardial fibrosis

Contacts and locations

Locations

  • Massachusetts General Hospital Cancer Center

    Boston, Massachusetts, 02215, United States

More trials for these conditions

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