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What causes male breast cancer? new study investigates

NCT ID NCT06219187

Knowledge-focused Sponsor: Institut Claudius Regaud 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 collected information from 93 men who have had breast cancer. Participants filled out a questionnaire about their life, work, family, and health history. The goal is to find patterns that might help explain why some men develop breast cancer. No treatments or drugs were tested.

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 study could help identify environmental or lifestyle factors that may increase the risk of male breast cancer.
What could go wrong
This is an observational study with no intervention, so it cannot prove cause and effect. The small sample size (93 participants) limits how widely the findings can be applied.

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

93 people

The number who actually took part.

Started

Feb 2024

Finished

Feb 2025

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

Patients with a history of male breast cancer (MBC) referenced in the IUCT-O's regional MutaFamily-MBC database.

Ages

18 years and older

Sex

Male 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: 1. Male patient with a personal history of breast cancer 2. Age ≥ 18 years 3. Patient who has had an oncogenetic consultation at IUCT-O and is registered in the IUCT-O oncogenetic database 4. Patient for whom no pathogenic variant has been detected on the HBOC panel (HBOC-) 5. Patient with no objection to participation in the trial (for deceased patients: trusted support person with no objection to participation). Exclusion Criteria: 1\. Patient who has forfeited his/her freedom by administrative or legal award or who is under legal protection (curatorship and guardianship, protection of justice).

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm male breast carcinoma

As listed by the trial registrant

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

Breast cancer

Contacts and locations

Locations

  • IUCT-O

    Toulouse, France

More trials for these conditions

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