Actively Recruiting

Breast Cancer Clinical Trials

Find recruiting clinical trials for breast cancer in the UK — including triple negative (TNBC), HER2+, HR+, and metastatic subtypes. See your treatment pathway and where trials fit in.

Free to use · Live data from ClinicalTrials.gov · Updated hourly

Breast Cancer Treatment Pathway

See where clinical trials fit into your treatment journey

Early Stage (Adjuvant / Neoadjuvant)

Treatment before or after surgery for early-stage disease

Standard: Chemotherapy, hormone therapy, HER2-targeted therapy, or combination

Metastatic — 1st Line

First treatment for advanced or metastatic breast cancer

Standard: Hormone therapy + CDK4/6 inhibitor (HR+) or Chemotherapy + HER2 therapy (HER2+)

Metastatic — 2nd Line

After progression on 1st-line treatment

Standard: PI3K inhibitor, mTOR inhibitor, antibody-drug conjugate (Enhertu, Sacituzumab)

Metastatic — 3rd Line +

After multiple progressions — clinical trials are especially important

Standard: Clinical trial, further targeted therapy, or SAC

About Breast Cancer Subtypes

HR+ / HER2−

The most common subtype. Hormone receptor positive, HER2 negative. Treatments include hormone therapy, CDK4/6 inhibitors, and targeted therapies for specific mutations (ESR1, PIK3CA).

HER2+

Overexpresses the HER2 protein. Treatments include trastuzumab, pertuzumab, T-DM1, and the newer antibody-drug conjugate Enhertu (trastuzumab deruxtecan).

Triple Negative (TNBC)

Does not express estrogen, progesterone, or HER2 receptors. More aggressive but treatment is evolving rapidly with immunotherapy and antibody-drug conjugates like sacituzumab govitecan.

Search Breast Cancer Trials

Loading trials from ClinicalTrials.gov...