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Could repeat radiation save breasts after cancer returns?

NCT ID NCT04371913

Disease control Sponsor: Weill Medical College of Cornell University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether women who had breast cancer come back after earlier lumpectomy and radiation can avoid a mastectomy by getting a second round of targeted radiation. About 120 women with small, isolated recurrences will receive partial or whole breast radiation depending on their prior treatment. The main goal is to see if this approach is safe and does not cause severe side effects.

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 120 people

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

Started

Jun 2020

Expected to finish

Dec 2035

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

19 to 90 years

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: * Isolated ipsilateral unifocal breast lesions * Limited size (\< 2-3 cm) without evidence of skin involvement * Histologically proven invasive breast carcinoma or carcinoma in situ * Negative histologic margins of resection * Patients with 0 to 3 positive axillary lymph nodes without extracapsular extension * No synchronous distant metastases * Age ≥ 18 years * ≥ 12 months interval between initial breast conserving therapy (surgery and whole breast radiotherapy) and recurrence * Previous WBI or IORT, brachytherapy or external beam partial breast treatment * Technical feasibility * Every kind of systemic therapy is allowed * Informed consent for clinical and research purposes signed Exclusion Criteria: * Regional recurrences (axillary, supraclavicular) * Positive histologic margins at resection * Metastatic disease * Poor cosmesis from previous surgery and RT * Extensive Intraductal Component

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm

As listed by the trial registrant

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

Breast cancer

How to take part

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

  1. The places running it

    3 sites. The list below names each one and where it is.

  2. 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 ↗

  3. 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

Locations

  • New York Presbyterian Brooklyn Methodist Hospital

    RECRUITING

    Brooklyn, New York, 10065, United States

  • New York Presbyterian Hospital - Queens

    RECRUITING

    New York, New York, 10065, United States

  • Weill Cornell Medicine

    RECRUITING

    New York, New York, 10065, United States

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