7 Breast Cancer Clinical Trials in Fullerton, CA (2026)

Q: How do I join a clinical trial in Fullerton?

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

Recruiting Breast Cancer Studies in Fullerton

NCT06966700Recruiting

A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)

Researchers are looking for new ways to treat types of breast cancer that are both: * High-risk, which means the cancer may have a higher chance of getting worse or coming back after treatment * Earl...

Fullerton, CAPHASE32,400 participantsMerck Sharp & Dohme LLC

View Study Details

NCT05827081Recruiting

Phase IIIb Study of Ribociclib + ET in Early Breast Cancer

The purpose of this open-label, multicenter, phase IIIb, single-arm study is to characterize the efficacy and safety of the combination of ribociclib and standard adjuvant endocrine therapy (ET) on in...

Fullerton, CAPHASE31,400 participantsNovartis Pharmaceuticals

View Study Details

NCT06312176Recruiting

A Study of Sacituzumab Tirumotecan (MK-2870) as a Single Agent and in Combination With Pembrolizumab (MK-3475) Versus Treatment of Physician's Choice in Participants With HR+/HER2- Unresectable Locally Advanced or Metastatic Breast Cancer (MK-2870-010)

The purpose of this study is to compare sacituzumab tirumotecan as a single agent, and in combination with pembrolizumab, versus Treatment of Physician's Choice (TPC) in participants with hormone rece...

Fullerton, CAPHASE31,200 participantsMerck Sharp & Dohme LLC

View Study Details

NCT06757634Recruiting

Phase 3 Study of Gedatolisib as First-Line Treatment for Patients With HR-Positive, HER2-Negative Advanced Breast Cancer (VIKTORIA-2)

This is a Phase 3, open-label, randomized, clinical trial evaluating the efficacy and safety of gedatolisib plus fulvestrant and CDK4/6 Inhibitors for the treatment of patients with locally advanced o...

Fullerton, CAPHASE31,180 participantsCelcuity Inc

View Study Details

NCT05232916Recruiting

Phase 3 Study to Evaluate the Efficacy and Safety of HER2/Neu Peptide GLSI-100 (GP2 + GM-CSF) in HER2/Neu Positive Subjects

This is a prospective, randomized, double-blinded, placebo-controlled, multi-center, Phase 3 study of GLSI-100 immunotherapy in HLA-A\*02 positive and HER2/neu positive subjects who are at high risk f...

Fullerton, CAPHASE3750 participantsGreenwich LifeSciences, Inc.

View Study Details

NCT04553770Recruiting

Trastuzumab Deruxtecan Alone or in Combination With Anastrozole for the Treatment of Early Stage HER2 Low, Hormone Receptor Positive Breast Cancer

This phase II trial investigates how well trastuzumab deruxtecan works alone or in combination with anastrozole in treating patients with HER2 low, hormone receptor positive breast cancer. Trastuzumab...

Fullerton, CAPHASE288 participantsJonsson Comprehensive Cancer Center

View Study Details

NCT05386108Recruiting

Study of Abemaciclib and Elacestrant in Patients With Brain Metastasis Due to ER+/HER-2- Breast Cancer

This is a multi-site, global, open-label study that includes a phase 1b evaluation of elacestrant in combination with abemaciclib in women and men with brain metastases from estrogen receptor (ER)-pos...

Fullerton, CAPHASE173 participantsStemline Therapeutics, Inc.

View Study Details

About Breast Cancer Clinical Trials in Fullerton

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 7 breast cancer clinical trials recruiting participants in Fullerton, CA. These studies are seeking a combined 7,091 participants. Research is being sponsored by Merck Sharp & Dohme LLC, Novartis Pharmaceuticals, Celcuity Inc and 3 other organizations. Clinical trial participation is free and participants receive study-related medical care at no cost.

Breast Cancer Clinical Trials in Fullerton — FAQ

Are there breast cancer clinical trials in Fullerton?

Yes, there are 7 breast cancer clinical trials currently recruiting in Fullerton, CA. Browse the studies on this page to find one that fits.

How do I join a clinical trial in Fullerton?

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

Are clinical trials in Fullerton free?

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

What breast cancer treatments are being tested?

The 7 active trials in Fullerton are testing new therapies including novel drugs, biologics, and treatment approaches for breast cancer.

Data updated July 17, 2026 from ClinicalTrials.gov