2 Breast Cancer Clinical Trials in San Mateo, CA (2026)

Q: How do I join a clinical trial in San Mateo?

Browse available studies, click one that interests you, and complete the free eligibility form. A study coordinator at the San Mateo research site will contact you.

Recruiting Breast Cancer Studies in San Mateo

NCT07391774Recruiting

Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial

This phase III trial compares standard of care hormone therapy plus ribociclib to chemotherapy followed by hormone therapy plus ribociclib for the treatment of patients with high anatomic stage breast...

San Mateo, CAPHASE31,978 participantsNational Cancer Institute (NCI)

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NCT06790693Recruiting

A Study Evaluating the Efficacy and Safety of Inavolisib Plus CDK4/6 Inhibitor and Letrozole vs Placebo + CDK4/6i and Letrozole in Participants With Endocrine-Sensitive PIK3CA-Mutated, Hormone Receptor-Positive, HER2-Negative Advanced Breast Cancer

This study will evaluate the efficacy and safety of the combination of inavolisib plus a cyclin-dependent kinase 4 and 6 inhibitor (CDK4/6i) and letrozole versus placebo plus a CDK4/6i and letrozole i...

San Mateo, CAPHASE3450 participantsHoffmann-La Roche

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About Breast Cancer Clinical Trials in San Mateo

Breast cancer is a disease in which cells in the breast grow out of control. It is the most common cancer in women worldwide and can also occur in men. Treatment options include surgery, radiation, chemotherapy, hormone therapy, and targeted therapies.

There are currently 2 breast cancer clinical trials recruiting participants in San Mateo, CA. These studies are seeking a combined 2,428 participants. Research is being sponsored by National Cancer Institute (NCI), Hoffmann-La Roche. Clinical trial participation is free and participants receive study-related medical care at no cost.

Breast Cancer Clinical Trials in San Mateo — FAQ

Are there breast cancer clinical trials in San Mateo?

Yes, there are 2 breast cancer clinical trials currently recruiting in San Mateo, CA. Browse the studies on this page to find one that fits.

How do I join a clinical trial in San Mateo?

Browse the studies listed above, click one that interests you, and complete the free eligibility form. A study coordinator at the San Mateo research site will contact you about next steps.

Are clinical trials in San Mateo free?

Yes, clinical trial participation is always free. Study-related treatment, medical tests, and doctor visits are provided at no cost. Many San Mateo studies also compensate for your time and travel.

What breast cancer treatments are being tested?

The 2 active trials in San Mateo are testing new therapies including novel drugs, biologics, and treatment approaches for breast cancer.

Data updated July 22, 2026 from ClinicalTrials.gov