Breast cancer recurrence: is the biology different the second time?
NCT ID NCT07275203
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether breast cancer's biology changes when it returns after treatment. Researchers will review medical records of 200 patients treated between 2015 and 2025. The goal is to see how often key markers differ between the first tumor and the recurrence, which could guide future treatment decisions.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 200 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Mar 2026
An estimate. Start dates often move.
- Expected to finish
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Oct 2026
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
The study will be conducted at Department of Clinical Oncology, Sohag University Hospital and Sohag Cancer center, Sohag, Egypt.
- Ages
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18 years and older
- Sex
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Anyone
- 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: * Age more than18 years old at time of diagnosis of breast cancer. * Patients who had recurrent breast cancer following adjuvant treatment. * Biopsy was taken from the site of recurrence and biology was done. Exclusion Criteria: * Patients with distant metastasis at time of presentation. * Patients diagnosed with double malignancy. * Patients with incomplete data records. * Recurrent breast cancer and biopsy difficult to be taken .
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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 official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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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.
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Other studies related to the condition(s) this trial covers.
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