CancerDrs

Breast Cancer clinical trials in California

84 actively recruiting breast cancer trials at 112 sites across California.

Data from ClinicalTrials.gov · last refreshed

Payments from drug makers to the doctors running these trials

For 2 of the trials on this page, the pharmaceutical company funding the trial also disclosed payments to the physicians leading it — public data from the federal CMS Open Payments database. Paying clinical-trial investigators for site work is expected and necessary for industry-funded trials; the scale and source are simply useful context when you're deciding whether to enroll. See the full breast cancer transparency page →

Phase 3 Recruiting Network

Shorter Chemo-Immunotherapy Without Anthracycline Drugs for Early-Stage Triple Negative Breast Cancer

This phase III trial compares the effects of shorter chemotherapy (chemo)-immunotherapy without anthracyclines to usual chemo-immunotherapy for the treatment of early-stage triple negative breast cancer. Paclitaxel is in a class of medicat…

Sponsor: SWOG Cancer Research Network
NCT ID: NCT05929768
Sites in California:
  • Kaiser Permanente-Anaheim — Anaheim, California
  • Mission Hope Medical Oncology - Arroyo Grande — Arroyo Grande, California
  • PCR Oncology — Arroyo Grande, California
  • Sutter Auburn Faith Hospital — Auburn, California
  • Sutter Cancer Centers Radiation Oncology Services-Auburn — Auburn, California
Phase 3 Recruiting Academic/Other

Pembrolizumab vs. Observation in People With Triple-negative Breast Cancer Who Had a Pathologic Complete Response After Chemotherapy Plus Pembrolizumab

This phase III trial compares the effect of continuation of treatment with pembrolizumab (usual approach) to observation only at preventing cancer from coming back in patients with early-stage triple-negative breast cancer (TNBC) who achie…

Sponsor: Alliance for Clinical Trials in Oncology
NCT ID: NCT05812807
Sites in California:
  • Mission Hope Medical Oncology - Arroyo Grande — Arroyo Grande, California
  • PCR Oncology — Arroyo Grande, California
  • Alta Bates Summit Medical Center-Herrick Campus — Berkeley, California
  • Tower Cancer Research Foundation — Beverly Hills, California
  • Marshall Cancer Center — Cameron Park, California
Phase 3 Recruiting Network

S1501 Dual Observational and Randomized Cohort Study of Patients With Metastatic HER-2+ Breast Cancer at Risk of Cardiac Toxicity

This trial has two cohorts of patients with human epidermal growth factor receptor (HER)-2-positive breast cancer that has spread to other places in the body. All patients must be receiving trastuzumab-based treatment. Both cohorts are bei…

Sponsor: SWOG Cancer Research Network
NCT ID: NCT03418961
Sites in California:
  • Kaiser Permanente-Deer Valley Medical Center — Antioch, California
  • Providence Saint Joseph Medical Center/Disney Family Cancer Center — Burbank, California
  • Enloe Medical Center — Chico, California
  • City of Hope Comprehensive Cancer Center — Duarte, California
  • Epic Care-Dublin — Dublin, California
Phase 3 Recruiting NIH

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 cancer with low risk of the cancer ret…

Sponsor: National Cancer Institute (NCI)
NCT ID: NCT07391774
Sites in California:
  • Sutter Auburn Faith Hospital — Auburn, California
  • Alta Bates Summit Medical Center-Herrick Campus — Berkeley, California
  • Tower Cancer Research Foundation — Beverly Hills, California
  • Palo Alto Medical Foundation-Fremont — Fremont, California
  • UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory Care — Irvine, California
Phase 3 Recruiting Industry

Study of Sacituzumab Govitecan-hziy and Pembrolizumab Versus Treatment of Physician's Choice in Patients With Triple Negative Breast Cancer Who Have Residual Invasive Disease After Surgery and Neoadjuvant Therapy (ASCENT-05/AFT-65 OptimICE-RD/GBG 119/NSABP B-63)

The goal of this study is to find out if the experimental product, sacituzumab govitecan-hziy (SG) in combination with pembrolizumab given after surgery, is effective and safe compared to the treatment of physician's choice (TPC) which inc…

Sponsor: Gilead Sciences
NCT ID: NCT05633654
Sites in California:
  • Alta Bates Summit Medical Center — Berkeley, California
  • Community Cancer Institute — Clovis, California
  • PIH Health Whittier Hospital — Downey, California
  • Compassionate Cancer Care Medical Group - Inc — Fountain Valley, California
  • Los Angeles Cancer Network — Los Angeles, California
Phase 3 Recruiting Industry

Sacituzumab Tirumotecan (MK-2870) Plus Pembrolizumab Versus TPC in TNBC Who Did Not Achieve pCR (MK-2870-012)

This is a randomized, open-label study comparing the efficacy and safety of adjuvant sacituzumab tirumotecan (MK-2870) in combination with pembrolizumab compared to treatment of physician's choice (TPC) in participants with triple-negative…

Sponsor: Merck Sharp & Dohme LLC
NCT ID: NCT06393374
Sites in California:
  • MemorialCare Orange Coast Medical Center ( Site 9501) — Fountain Valley, California
  • Scripps Cancer Center ( Site 0052) — La Jolla, California
  • Cancer and Blood Specialty Clinic ( Site 0008) — Los Alamitos, California
  • Kaiser Permanente - Oakland ( Site 0079) — Oakland, California
  • Profound Research LLC ( Site 0105) — Oceanside, California
Phase 3 Recruiting Industry

Study of the Bria-IMT Regimen and CPI vs Physicians' Choice in Advanced Metastatic Breast Cancer.

This is a multicenter randomized, open label study to evaluate overall survival with the Bria-IMT regimen in combination with Checkpoint Inhibitor \[Retifanlimab\], versus Treatment of Patients'/Physicians' Choice (TPC) in advanced metasta…

Sponsor: BriaCell Therapeutics Corporation
NCT ID: NCT06072612
Sites in California:
  • Los Angeles cancer Network_Anaheim — Anaheim, California
  • Comprehensive Blood and Cancer Center — Bakersfield, California
  • Cedars-Sinai Cancer Beverly Hills — Beverly Hills, California
  • Los Angeles Cancer Network_Corona — Corona, California
  • Los Angeles cancer Network_Fountain Vallley — Fountain Valley, California
Phase 2, Phase 3 Recruiting Industry

A Study of Izalontamab Brengitecan Versus Chemotherapy in Participants With Previously Untreated, Locally Advanced, Recurrent Inoperable, or Metastatic Triple-negative Breast Cancer Ineligible for Anti-PD(L)1 Drugs (IZABRIGHT-Breast01)

The purpose of this study is to assess the efficacy and safety of iza-bren, a bi-specific antibody-drug conjugate against EGFR and HER3 with a topoisomerase inhibitor payload versus treatment of physician's choice (TPC) (paclitaxel, nab-pa…

Sponsor: Bristol-Myers Squibb
NCT ID: NCT06926868
Sites in California:
  • Helios Clinical Research — Cerritos, California
  • Local Institution - 0307 — Cerritos, California
  • Local Institution - 0308 — Cerritos, California
  • Local Institution - 0309 — Cerritos, California
  • Local Institution - 0311 — Long Beach, California
Phase 3 Recruiting Industry

A Study of Metastases Free Survival With Saruparib vs Placebo Added to a Standard RT/ADT in Men With High-risk Prostate Cancer With a BRCA Mutation

The purpose of the study is to demonstrate superiority of Saruparib (AZD5305) relative to placebo added to a standard radiation therapy (RT) + androgen deprivation therapy (ADT) regimen by assessment of metastases-free survival in particip…

Sponsor: AstraZeneca
NCT ID: NCT06952803
Sites in California:
  • Research Site — La Jolla, California
  • Research Site — La Jolla, California
  • Research Site — Los Angeles, California
  • Research Site — San Diego, California
  • Research Site — San Luis Obispo, California
Phase 3 Recruiting Industry

A Study Evaluating the Efficacy and Safety of Inavolisib Plus Fulvestrant Compared With Alpelisib Plus Fulvestrant in Participants With HR-Positive, HER2-Negative, PIK3CA Mutated, Locally Advanced or Metastatic Breast Cancer Post CDK4/6i and Endocrine Combination Therapy

This is a Phase III, multicenter, randomized, open-label, global study designed to evaluate the efficacy and safety of inavolisib plus fulvestrant compared with alpelisib plus fulvestrant in patients with hormone receptor (HR)-positive, hu…

Sponsor: Hoffmann-La Roche
NCT ID: NCT05646862
Sites in California:
  • Marin Cancer Care Inc — Greenbrae, California
  • Cancer Blood and Specialty Clinic — Los Alamitos, California
  • Los Angeles Cancer Network — Los Angeles, California
  • University of California, Irvine Medical Center — Orange, California
  • UC Davis Comprehensive Cancer Center — Sacramento, California
Phase 2 Recruiting Academic/Other

I-SPY TRIAL: Neoadjuvant and Personalized Adaptive Novel Agents to Treat Breast Cancer

The purpose of this study is to further advance the ability to practice personalized medicine by learning which new drug agents are most effective with which types of breast cancer tumors and by learning more about which early indicators o…

Sponsor: QuantumLeap Healthcare Collaborative
NCT ID: NCT01042379
Sites in California:
  • University of California - Davis, Comprehensive Cancer Center — Davis, California
  • City of Hope — Duarte, California
  • University of California San Diego — La Jolla, California
  • University of Southern California — Los Angeles, California
  • HOAG Memorial Hospital Presbyterian — Newport Beach, California
Phase 2 Recruiting Industry

A Study of Imlunestrant (LY3484356) in Premenopausal Women With Estrogen Receptor-Positive (ER+) Human Epidermal Growth Factor Receptor 2 Negative (HER2-) Early Breast Cancer

This study will include two groups of patients: Cohort 1 and Cohort 2. Cohort 1: will help researchers learn how a medicine called imlunestrant (LY3484356) affects a specific type of breast cancer. Some patients will take both imlunestrant…

Sponsor: Eli Lilly and Company
NCT ID: NCT07287098
Sites in California:
  • City of Hope — Duarte, California
  • City of Hope Orange County Lennar Foundation Cancer Center — Irvine, California
  • USC/Norris Comprehensive Cancer Center — Los Angeles, California
  • UCLA Hematology/Oncology - Parkside — Santa Monica, California
Phase 1, Phase 2 Recruiting Industry

Rinatabart Sesutecan (Rina-S, PRO1184, GEN1184) for Advanced Solid Tumors (GCT1184-01/ PRO1184-001)

This study will test the safety, including side effects, and determine the characteristics of a drug called Rina-S in participants with solid tumors. Participants will have solid tumor cancer that has spread through the body (metastatic) o…

Sponsor: Genmab
NCT ID: NCT05579366
Sites in California:
  • University of California Los Angeles Medical Center — Los Angeles, California
  • University of California, San Diego; Moores Cancer Center — San Diego, California
  • USOR Sansum Clinic — Santa Barbara, California
  • Providence Medical Foundation — Santa Rosa, California
Phase 1, Phase 2 Recruiting Industry

A Phase 1/2a Study of DB-1303/BNT323 in Advanced/Metastatic Solid Tumors

This is a dose-escalation and dose-expansion Phase 1/2a trial to evaluate the safety and tolerability of DB-1303/BNT323 in subjects with advanced solid tumors that express HER2.

Sponsor: DualityBio Inc.
NCT ID: NCT05150691
Sites in California:
  • Helios Clinical Research — Cerritos, California
  • California Research Institute — Los Angeles, California
  • Sharp Memorial Hospital — San Diego, California
Phase 2 Recruiting Industry

A Study of Alisertib in Combination With Endocrine Therapy in Patients With HR-positive, HER2-negative Recurrent or Metastatic Breast Cancer

PUMA-ALI-1201 is a randomized, dose optimization, multicenter, Phase 2 study of alisertib administered in combination with endocrine therapy in participants with pathology-confirmed HR-positive/HER2-negative metastatic breast cancer (MBC) …

Sponsor: Puma Biotechnology, Inc.
NCT ID: NCT06369285
Sites in California:
  • Beverly Hills Cancer Center — Beverly Hills, California
  • MemorialCare Orange Coast Medical Center — Fountain Valley, California
  • City of Hope at Orange County Lennar Foundation Cancer Center — Irvine, California
  • LA Cancer Network — Los Angeles, California
  • UCLA Department of Medicine - Hematology/Oncology — Los Angeles, California
Phase 1, Phase 2 Recruiting Industry

The Evaluation of PC14586 in Patients With Advanced Solid Tumors Harboring a TP53 Y220C Mutation (PYNNACLE)

The Phase 2 monotherapy portion of this study is currently enrolling and will evaluate the efficacy and safety of PC14586 (INN rezatapopt) in participants with locally advanced or metastatic solid tumors harboring a TP53 Y220C mutation. Th…

Sponsor: PMV Pharmaceuticals, Inc
NCT ID: NCT04585750
Sites in California:
  • University of California Irvine Chao Family Comprehensive Cancer Center — Irvine, California
  • University of San Diego Moores Cancer Center — La Jolla, California
  • UCLA Jonsson Comprehensive Cancer Center — Los Angeles, California
  • USC Norris Comprehensive Cancer Center — Los Angeles, California
Phase 2 Recruiting Academic/Other

DCIS: RECAST Trial Ductal Carcinoma In Situ: Re-Evaluating Conditions for Active Surveillance Suitability as Treatment

The goal of this trial is to see if active surveillance monitoring and hormonal therapy in patients diagnosed with ductal cell carcinoma in situ (DCIS), an early stage of breast cancer, can be an effective management of the disease. Partic…

Sponsor: QuantumLeap Healthcare Collaborative
NCT ID: NCT06075953
Sites in California:
  • Berkeley Outpatient Center — Berkeley, California
  • City of Hope -Duarte Cancer Center — Duarte, California
  • City of Hope - Lennar Foundation Cancer Center — Irvine, California
  • UCLA — Los Angeles, California
  • UCSF — San Francisco, California
Phase 2 Recruiting Industry

A Study to Assess the Efficacy and Safety of FORE8394 in Participants With Cancer Harboring BRAF Alterations

The objective of this Master Protocol is to evaluate the efficacy and safety of plixorafenib in participants with BRAF altered (BRAF V600E or BRAF fusions) locally advanced or metastatic solid tumors, or recurrent or progressive primary ce…

Sponsor: Fore Biotherapeutics
NCT ID: NCT05503797
Sites in California:
  • Precision NextGen Oncology & Research Center — Beverly Hills, California
  • UCSF Helen Diller Family Comprehensive Cancer Center — San Francisco, California
  • University of California Los Angeles Rheumatology — Westwood, Los Angeles, California
Phase 2 Recruiting Industry

ASPEN-09-03: A Study of Evorpacept in Combination With Trastuzumab and Chemotherapy in Metastatic HER2-Positive Breast Cancer

The Substudy Protocol ASPEN-09-03 is a Phase 2, single-arm, multicenter study evaluating the efficacy, safety, and tolerability of evorpacept in combination with trastuzumab and chemotherapy in participants with HER2-positive metastatic br…

Sponsor: ALX Oncology Inc.
NCT ID: NCT07007559
Sites in California:
  • City of Hope — Duarte, California
  • UC San Diego Moores Cancer Center — La Jolla, California
  • UC Irvine Health - Chao Family Comprehensive Cancer Center — Orange, California
Phase 2 Recruiting Industry

Study of PF-07248144 in Advanced or Metastatic Solid Tumors

This is an open-label, multi center study to evaluate safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of PF-07248144 and early signs of clinical efficacy of PF-07248144 as a single agent and in combination with other…

Sponsor: Pfizer
NCT ID: NCT04606446
Sites in California:
  • Cedars-Sinai Cancer at Cedars-Sinai Medical Center — Los Angeles, California
  • UCSF Medical Center at Mission Bay — San Francisco, California
Phase 1, Phase 2 Recruiting Industry

ORION-1: Study of AVZO-023 as a Single Agent and in Combination With AVZO-021, and/or Endocrine Therapy in Advanced Solid Tumors

This study, the first clinical trial of AVZO-023, aims to determine the safety, tolerability, pharmacokinetics (PK), pharmacodynamics, maximum tolerated dose, and anti-tumor effects of AVZO-023 in patients with advanced solid tumors. AVZO-…

Sponsor: Avenzo Therapeutics, Inc.
NCT ID: NCT06998407
Sites in California:
  • Avenzo Therapeutics Recruiting Site — Los Angeles, California
  • Avenzo Therapeutics Recruiting Site — Los Angeles, California
Phase 1, Phase 2 Recruiting Industry

A Study of DB-1310 in Advanced/Metastatic Solid Tumors

This is a dose-escalation and dose-expansion Phase 1/2a trial to evaluate the safety and tolerability of DB-1310 in subjects with advanced solid tumors.

Sponsor: DualityBio Inc.
NCT ID: NCT05785741
Sites in California:
  • University of California, Davis Comprehensive Cancer Center — Sacramento, California
  • UCLA Hematology/Oncology - Santa Monica — Santa Monica, California
Phase 1, Phase 2 Recruiting Industry

A Phase I/IIa Study of AZD8205 Given Alone or Combined, in Participants With Advanced/Metastatic Solid Malignancies

This research study is studying a new compound, AZD8205, as a possible treatment for advanced or metastatic solid tumours alone or in combination with anti-cancer agents

Sponsor: AstraZeneca
NCT ID: NCT05123482
Sites in California:
  • Research Site — Duarte, California
  • Research Site — Irvine, California
  • Research Site — Santa Monica, California
  • Research Site — Santa Rosa, California
Phase 2 Recruiting Academic/Other

Investigating the Effectiveness of Stereotactic Body Radiotherapy (SBRT) in Addition to Standard of Care Treatment for Cancer That Has Spread Beyond the Original Site of Disease

This study is being done to determine if stereotactic body radiotherapy (SBRT) when delivered to all sites of disease in participants with 1-5 metastases will increase the length of time before participants' disease gets worse.

Sponsor: Memorial Sloan Kettering Cancer Center
NCT ID: NCT03808337
Sites in California:
  • Natera, Inc. (Data and Specimen Analysis Only) — San Carlos, California

Showing 25 of 84 trials with sites in California. See all breast cancer trials →

Medical disclaimer: This page aggregates public ClinicalTrials.gov data. It is not medical advice. Always confirm eligibility and enrollment details with the trial site or your oncologist.

Source: ClinicalTrials.gov API v2 · Last checked: 2026-11-09