Collection of Specimens and Clinical Data for Patients With Recurrent or Metastatic Breast Cancer or Male Breast Cancer

February 23, 2026 updated by: Mayo Clinic
This study is being done to create a resource of samples and information that can be used to improve our understanding of the development, progression and treatment of recurrent or metastatic breast cancer or male breast cancer.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVE:

I. To collect blood samples and fresh tissue from biopsies of metastatic lesions from Mayo Clinic patients with metastatic breast cancer.

OUTLINE: This is an observational study.

Patients undergo blood sample collection, provide clinical residual tissue samples and have their medical records reviewed on study.

Study Type

Observational

Enrollment (Estimated)

2000

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Recruiting
        • Mayo Clinic in Rochester
        • Principal Investigator:
          • Kathryn J. Ruddy, M.D.
        • Contact:
        • Principal Investigator:
          • Fergus J. Couch, Ph.D.
        • Sub-Investigator:
          • Karthik V. Giridhar, M.D.

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients with invasive cancer, suspected or known recurrent or metastatic lesions, as well as males with biopsy proven breast cancer

Description

Inclusion Criteria:

  • Female participants must have histologically or cytologically confirmed invasive breast cancer.
  • Male participants must have biopsy proven breast cancer.
  • Age must be >= 18 years, and all must be able to understand and willing to sign an informed consent document.

Exclusion Criteria:

  • Dementia, altered mental status, or any psychiatric condition that would prohibit the understanding or rendering of informed consent; a history of serious or life-threatening allergic reaction to local anesthetics (i.e. lidocaine, xylocaine).
  • Any other condition, which in the opinion of the patient's treating oncologist, or the physician performing the biopsy procedure, would make participation in this protocol unreasonably hazardous for the patient.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Observational
Patients undergo blood sample collection, provide clinical residual tissue samples and have their medical records reviewed on study.
Other: Non-Interventional Study
Non-interventional study

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Response to targeted therapies
Time Frame: Baseline
Response to targeted therapies will be evaluated in organoid or mouse xenograft models derived from tumor biospecimens obtained from participants.
Baseline
Change in tumor cells
Time Frame: Baseline
Changes in tumor cells will be evaluated following metastasis to other organs and after various treatments.
Baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Mayo Clinic

Investigators

  • Principal Investigator: Fergus J. Couch, Ph.D., Mayo Clinic in Rochester

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 5, 2014

Primary Completion (Estimated)

June 30, 2034

Study Completion (Estimated)

June 30, 2034

Study Registration Dates

First Submitted

January 3, 2024

First Submitted That Met QC Criteria

January 11, 2024

First Posted (Actual)

January 23, 2024

Study Record Updates

Last Update Posted (Actual)

February 25, 2026

Last Update Submitted That Met QC Criteria

February 23, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 14-002919 (Other Identifier: Mayo Clinic in Rochester)
  • NCI-2023-10076 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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