Gene profiling to determine chemotherapy needs in breast cancer patients

Gene Expression Profiling to Help Define the Need for Neo-Adjuvant Chemotherapy in HR+, HER- Breast Cancer Patients

Observational Universitair Ziekenhuis Brussel · NCT05666258

This study is testing whether gene profiling can help decide if certain breast cancer patients need chemotherapy before surgery to improve their chances of survival.

Quick facts

Study typeObservational
Enrollment20 (estimated)
Ages18 Years to 85 Years
SexFemale
SponsorUniversitair Ziekenhuis Brussel Academic / other
Drugs / interventionschemotherapy
Locations1 site (Jette, Brussel)
Trial IDNCT05666258 on ClinicalTrials.gov

What this trial studies

This observational study aims to assess the necessity of neo-adjuvant chemotherapy in patients with HR+, HER2- breast cancer by utilizing Gene Expression Profiling (GEP). Patients diagnosed with specific tumor characteristics will undergo GEP testing to stratify them into low- or high-risk categories for cancer recurrence. Those identified as high-risk will receive neo-adjuvant chemotherapy prior to surgery, potentially improving their overall survival rates. The study focuses on surgical de-escalation, allowing for tailored treatment based on individual risk assessments.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18-85 with newly diagnosed HR+, HER2- breast cancer and specific tumor characteristics.

Not a fit: Patients with advanced stage tumors (cT4, cN2-3, cM1) or those who have received chemotherapy in the last 5 years may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to more personalized treatment plans, reducing unnecessary chemotherapy for low-risk patients while ensuring high-risk patients receive timely intervention.

How similar studies have performed: Other studies utilizing Gene Expression Profiling for treatment stratification in breast cancer have shown promising results, indicating a potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Tumour characteristics: HR+, HER-
* Histopathological tumour characteristics: cT1-3, cN1, cM0, all histological types included
* Age: 18-85 years

Exclusion Criteria:

* Tumour characteristics: cT4, cN2-3, cM1
* Age: \<18 or \>85 years old
* Received chemotherapy in the last 5 years
* Pregnancy

Where this trial is running

Jette, Brussel

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Breast CancerNeoadjuvant chemotherapyGEP
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.