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Breast Cancer clinical trials in Westminster, CA
7 studies for Breast Cancer are looking for participants at sites in and around Westminster (within about 30 miles). Open a study to see who can join and how to contact the study team.
Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →
A Phase 2 Neoadjuvant Study of Zanidatamab in Combination With Chemotherapy in Participants With HER2-positive Breast Cancer
RecruitingPhase 2
- Cancer & Blood Research Center, Los Alamitos · 5 mi away
Signatera-Guided CDK4/6 Inhibitor Therapy in Breast Cancer
Recruiting
- Cancer and Blood Research Center, Los Alamitos · 5 mi away
Palazestrant in Combination With Ribociclib for the First-line Treatment of ER+/HER2- Advanced Breast Cancer
RecruitingPhase 3
- Clinical Trial Site, Los Alamitos · 5 mi away
ROSETTA Breast-01: The Effects and Safety of Pumitamig in Patients With Triple-Negative Breast Cancer
RecruitingPhase 3
- Cancer and Blood Specialty Clinic (CBSC), Los Alamitos · 5 mi away
A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence
RecruitingPhase 3
- Cancer and Blood Research Center, LLC, Los Alamitos · 5 mi away
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
RecruitingPhase 3
- Cancer and Blood Specialty Clinic, Los Alamitos · 5 mi away
Trastuzumab Deruxtecan Alone or in Combination With Anastrozole for the Treatment of Early Stage HER2 Low, Hormone Receptor Positive Breast Cancer
RecruitingPhase 2
- Cancer Blood and Specialty Clinic, Los Alamitos · 5 mi away
About Breast Cancer
Breast cancer is a cancer that starts in the breast tissue, when cells change and grow out of control. These extra cells can form a mass called a tumor.
More about Breast Cancer on MedlinePlus
Breast Cancer trials in other cities
- New York City, NY136 studies
- Houston, TX126 studies
- Boston, MA112 studies
- Nashville, TN81 studies
- Los Angeles, CA73 studies
- Edison, NJ68 studies
- St. Louis, MO64 studies
- Queens, NY64 studies
- Durham, NC64 studies
- Chicago, IL59 studies
- Philadelphia, PA56 studies
- Dallas, TX55 studies
Other studies in Westminster
- Non-Small Cell Lung Cancer8 studies
- Obesity6 studies
- Schizophrenia5 studies
- Colorectal Cancer5 studies
- Ulcerative Colitis5 studies
- Type 2 Diabetes4 studies
- Crohn's Disease4 studies
- Overweight4 studies
- Stomach Cancer3 studies
From ClinicalTrials.gov, data retrieved Oct 6, 2026. Each study sets its own eligibility; the study team decides who can join.