Understanding breast cancer response during pre-surgery treatment

Breast Cancer Evolution During Neoadjuvant Systemic Therapy

Observational Royal Marsden NHS Foundation Trust · NCT06681064

This study is trying to see how breast cancer responds to treatment before surgery by looking at tissue and blood samples from patients to find out what factors might affect their recovery and risk of cancer coming back.

Quick facts

Study typeObservational
Enrollment500 (estimated)
Ages18 Years and up
SexAll
SponsorRoyal Marsden NHS Foundation Trust Academic / other
Drugs / interventionschemotherapy, immunotherapy
Locations1 site (London)
Trial IDNCT06681064 on ClinicalTrials.gov

What this trial studies

This observational study collects breast cancer tissue and blood samples from patients undergoing neoadjuvant systemic therapy before surgery. It aims to investigate the molecular and genetic factors that influence treatment response and identify patients at higher risk of cancer recurrence. Additionally, MRI scans and stool samples may be obtained to enhance the understanding of treatment effects. The findings could lead to improved methods for measuring treatment response and tailoring therapies for better outcomes.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and over with histologically confirmed non-metastatic invasive breast cancer who are about to start neoadjuvant chemotherapy, targeted therapy, or immunotherapy.

Not a fit: Patients with metastatic breast cancer or those receiving neoadjuvant endocrine therapy only may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to personalized treatment strategies that improve survival rates for breast cancer patients.

How similar studies have performed: Other studies have shown success in understanding treatment responses in breast cancer, making this approach both relevant and promising.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Histologically confirmed non-metastatic invasive breast cancer.
2. Be suitable for, but have not commenced, neoadjuvant chemotherapy, targeted therapy, or immunotherapy.
3. If HER2-, suitable for treatment with upfront taxane chemotherapy. If HER2+, suitable for treatment with anti-HER2 targeted therapy.
4. Be aged 18 years and over.
5. Have given written informed consent to participate.

Exclusion Criteria:

1. Metastatic breast cancer at diagnosis.
2. Treatment with neoadjuvant endocrine therapy only.
3. Presence of any psychological, familial or sociological condition potentially hampering compliance with the study protocol and follow-up schedule.

Where this trial is running

London

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 CancerTriple Negative Breast CancerER+ Breast CancerHER2+ Breast CancerNeoadjuvant Therapy
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.