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Blood tests could personalize breast cancer radiation

NCT ID NCT04308720

Knowledge-focused 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how radiation therapy for breast cancer affects tumor DNA and immune cells in the blood. Researchers will track these markers in 217 patients to see if they can predict treatment response. The goal is to use this information to customize radiation plans in the future.

What this could mean

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

What this could lead to
If successful, this could help doctors tailor radiation therapy for breast cancer patients based on blood markers.
What could go wrong
This is an observational study, not testing a new treatment. Results may not lead to immediate changes in care.

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.

Participants

217 people

The number who actually took part.

Started

Oct 2019

Expected to finish

Oct 2028

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.

Who is studied

Women ages 18 and older with high-risk breast cancer with plan for adjuvant radiation therapy including the regional lymph nodes at Mayo Clinic.

Ages

18 to 100 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: * 18 years of age or older * Histologically confirmed primary or recurrent non-metastatic invasive breast cancer with plans for adjuvant post-lumpectomy or post-mastectomy radiation therapy at the Mayo Clinic and indications for regional nodal irradiation. * Or patients undergoing curative intent irradiation for oligometastatic breast cancer (=\< 3 sites of metastases) is permitted * Willingness to provide informed consent and expresses understanding of this protocol and its requirements, risks, and discomforts * Patients with non-metastatic breast cancer must have completed their final breast surgery including re-excision of margins for invasive cancer and ductal carcinoma in situ (DCIS) or chemotherapy within 90 days prior to registration but no sooner than 21 days prior to the initiation of radiation therapy (RT). * Bilateral breast cancer is permitted * Positive or close margins is allowed Exclusion Criteria: * Other active malignancy =\< 2 years prior to registration (exceptions: non-melanotic skin cancer or carcinoma-in-situ of the cervix) * Pregnancy or lactation * Inability on the part of the patient to understand the informed consent to be compliant with the protocol

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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

Contacts and locations

Locations

  • Mayo Clinic in Rochester

    Rochester, Minnesota, 55905, United States

More trials for these conditions

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