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Could a week of radiation be enough for breast cancer?

NCT ID NCT06295744

Symptom relief Sponsor: University of Wisconsin, Madison 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 24, 2026 · Updated 2 times

Summary

This study is testing a very short course of radiation therapy for women with early-stage breast cancer. Instead of weeks of treatment, participants receive whole breast radiation with a targeted boost over just 5 days. Researchers will track how the breast looks and feels, and how patients rate their quality of life, for up to 5 years. The goal is to see if this ultra-short schedule is both safe and satisfactory for patients.

What this could mean

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

Active substance
Radiation therapy (whole breast irradiation with simultaneous integrated boost)
What this could lead to
If successful, this could show that a shorter, more convenient radiation schedule is just as good for cosmetic outcomes and quality of life as longer courses.
What could go wrong
This is a small, early-phase study with only 50 participants, so results may not apply to everyone. There is also a risk of side effects like skin irritation or fatigue from the radiation.

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

50 people

The number who actually took part.

Started

Apr 2024

Expected to finish

Sep 2031

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: * Ability to understand and the willingness to sign a written informed consent document * Histologically confirmed early stage (stage T1-T2) invasive carcinoma of the breast or DCIS * Breast conserving surgery with negative margins and negative nodes (surgical axillary staging not mandatory), stage N0 or Nx * Treatment plan should include breast conserving surgery and adjuvant whole breast irradiation (WBI) therapy delivered with 3D-CRT or IMRT techniques * Treatment plan includes breast tumor bed boost * Willingness to comply with all study procedures and be available for the duration of the study Exclusion Criteria: * Mastectomy of ipsilateral breast * Lack of histologic diagnosis * Histologic involvement of the axillary or regional nodes or metastatic disease * Accelerated partial breast irradiation treatment plan * Previous history of non-breast malignancy diagnosed in the past 5 years except for basal or squamous cell cancer of the skin * Previous history of chest radiation therapy * Previous history of ipsilateral breast cancer * Concurrent cytotoxic chemotherapy * Active connective tissue disease including scleroderma * Inability or unwillingness to return for required follow up visit

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm ductal breast carcinoma in situ invasive breast carcinoma

As listed by the trial registrant

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

Early-stage breast cancer

Contacts and locations

Locations

  • UW Carbone Cancer Center

    Madison, Wisconsin, 53792, United States

More trials for these conditions

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