New study investigates why breast cancer is more aggressive in young women
NCT ID NCT07601152
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study aims to understand why breast cancer in young women is often more aggressive. Researchers will look at how pregnancy and breastfeeding might influence the disease. They will collect information from 1,000 women aged 45 or younger (and a comparison group aged 55+) with certain types of breast cancer. The goal is to learn more about the biology of these cancers, not to test a new treatment.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 1,000 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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May 2026
An estimate. Start dates often move.
- Expected to finish
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Feb 2031
An estimate. End dates often move.
- Lead sponsor
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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 triple-negative (TN) or RH+ breast cancer treated at the ICO who were ≤ 45 years old or ≥ 55 years old at the time of diagnosis.
- Ages
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Up to 45 years
- Sex
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Female participants only
- Healthy volunteers
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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 Hide 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: * Triple-negative breast cancer or RH+/HER2- * Patient aged ≤ 45 years at the time of diagnosis ou Patient aged ≥ 55 years at the time of diagnosis Exclusion Criteria: * Availability of a diagnostic tumor sample
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Institut de Cancerologie de L'Ouest
Saint-Herblain, 44800, France
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Other studies related to the condition(s) this trial covers.
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