Male breAsT cAncer preDisposition Factor: Creation of a Control Cohort 2 (MATADOR2)

April 23, 2026 updated by: Institut Claudius Regaud

This is an interventional, prospective, single-center study designed to collect and describe genetic, environmental and psychosocial control data from male participants. The participants did not have any prior history of cancer at the time of the oncogenetic consultation and do not have the family mutation researched during the oncogenetic consultation (targeted genetic testing). The participants are referenced in the IUCT-O medical records as family members of patients suffering from male breast cancer.

The study will be conducted on a population of 120 participants.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

120

Phase

  • Not Applicable

Contacts and Locations

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

Study Contact

Study Locations

  • France
      • Toulouse, France, 31059
        • Institut Universitaire du Cancer Toulouse - Oncopole, Laboratoire d'oncogénétique
        • Contact:

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

  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • 1. A male volunteer participant with no personal history of cancer, registered in the IUCT-O oncogenetics database as a relative of a patient carrying a pathogenic or likely pathogenic variant in one of the cancer predisposition genes routinely analyzed at the oncogenetics laboratory
  • 2. Age ≥ 66 years
  • 3. Participant with no known family relationship to a patient of the MATADOR1 cohort
  • 4. Participant who has undergone an oncogenetic consultation at the IUCT-O
  • 5. Participant who does not carry the familial mutation in any of the cancer predisposition genes previously tested
  • 6. Participant for which an archived blood sample is available for the research in the oncogenetics laboratory
  • 7. Participant having signed an informed consent form before inclusion in the study and before any study specific procedure

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).

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

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Control group

The participants enrolled in this study (MATADOR2) will serve as control group for the patients enrolled in the previous study (MATADOR = MATADOR1) in order to identify:

  1. the environmental and psychosocial predisposition factors
  2. the genetic predisposition factors
Other: Questionnaire completion

In order to meet the study's objective, after written informed consent was obtained, participants will be asked to complete a questionnaire characterizing their environmental and psychosocial context. The questionnaire is to be filled out by the participants at home. It is estimated that the questionnaire will take around 30 minutes to complete.

Demographics data will also be collected from the medical records of included participants.

Other: Genetic analysis (WES)
In order to meet the study's objective, after completion of the questionnaire, a genetic analysis (Whole Exome Sequencing) will be conducted on an archived blood sample collected during the initial oncogenetics consultation. The patient had given consent to this sample in order for the oncogenetics laboratory to perform the targeted genetic analysis (presence of family mutation). No additional blood sample will be collected for the purpose of this study.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The environmental and psychosocial data in the questionnaire will be described by the usual descriptive statistics.
Time Frame: 30 days approximately for each participant, 1 year and 1 month in total for all patients
A 75-question questionnaire (created for the purposes of the MATADOR project) will cover such aspects as the participant's living conditions, professional situation, qualifications or level of education, social environment, early life and family environment, general health and recent significant events. For each question of the questionnaire: quantitative variables will be described by the median, minimum, maximum and number of missing data, and qualitative variables by the numbers, percentages and number of missing data.
30 days approximately for each participant, 1 year and 1 month in total for all patients

Other Outcome Measures

Outcome Measure
Time Frame
The list of genetic variants of the participants will be otained through a WES (Whole Exome Sequencing) analysis
Time Frame: Through study completion, an average of 1 year
Through study completion, an average of 1 year

Collaborators and Investigators

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

Sponsor

Institut Claudius Regaud

Collaborators

Ligue contre le cancer, France

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 (Estimated)

June 15, 2026

Primary Completion (Estimated)

July 15, 2027

Study Completion (Estimated)

July 15, 2027

Study Registration Dates

First Submitted

April 16, 2026

First Submitted That Met QC Criteria

April 23, 2026

First Posted (Actual)

April 30, 2026

Study Record Updates

Last Update Posted (Actual)

April 30, 2026

Last Update Submitted That Met QC Criteria

April 23, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 26 SEIN 02

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

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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