CancerDrs

Breast Cancer clinical trials

300 actively recruiting breast cancer trials in the United States. The most common cancer in women in the U.S. Clinical trials test new therapies for early-stage, locally advanced, and metastatic breast cancer.

Data from ClinicalTrials.gov · last refreshed · Breast Cancer stats on SEER

51
Phase 1
91
Phase 2
22
Phase 3
3
Phase 4
133
Other

Breast Cancer by the numbers (U.S.)

316,950
Estimated new cases (2025)
42,170
Estimated deaths (2025)
91.7%
5-year relative survival
63
Median age at diagnosis

Source: NCI SEER Cancer Stat Facts

Browse breast cancer trials by state

Top trials by phase + site coverage

Phase 3 Recruiting Academic/Other

Evaluating the Addition of Adjuvant Chemotherapy to Ovarian Function Suppression Plus Endocrine Therapy in Premenopausal Patients With pN0-1, ER-Positive/HER2-Negative Breast Cancer and an Oncotype Recurrence Score Less Than or Equal to 25

This Phase III Trial will determine whether adjuvant chemotherapy (ACT) added to ovarian function suppression (OFS) plus endocrine therapy (ET) is superior to OFS plus ET in improving invasive breast cancer-free survival (IBCFS) among prem…

Sponsor: NRG Oncology
NCT ID: NCT05879926
Locations:
  • University of Alabama at Birmingham Cancer Center — Birmingham, Alabama
  • Anchorage Associates in Radiation Medicine — Anchorage, Alaska
  • Anchorage Radiation Therapy Center — Anchorage, Alaska

+ 1223 more sites in the U.S.

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
Locations:
  • University of Alabama at Birmingham Cancer Center — Birmingham, Alabama
  • Anchorage Associates in Radiation Medicine — Anchorage, Alaska
  • Anchorage Radiation Therapy Center — Anchorage, Alaska

+ 952 more sites in the U.S.

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
Locations:
  • University of Alabama at Birmingham Cancer Center — Birmingham, Alabama
  • Thomas Hospital — Fairhope, Alabama
  • Mobile Infirmary Medical Center — Mobile, Alabama

+ 825 more sites in the U.S.

Phase 3 Recruiting Academic/Other

De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)

This Phase III Trial evaluates whether breast conservation surgery and endocrine therapy results in a non-inferior rate of invasive or non-invasive ipsilateral breast tumor recurrence (IBTR) compared to breast conservation with breast radi…

Sponsor: NRG Oncology
NCT ID: NCT04852887
Locations:
  • University of Alabama at Birmingham Cancer Center — Birmingham, Alabama
  • University of South Alabama Mitchell Cancer Institute — Mobile, Alabama
  • Kingman Regional Medical Center — Kingman, Arizona

+ 809 more sites in the U.S.

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
Locations:
  • Anchorage Associates in Radiation Medicine — Anchorage, Alaska
  • Alaska Breast Care and Surgery LLC — Anchorage, Alaska
  • Alaska Oncology and Hematology LLC — Anchorage, Alaska

+ 574 more sites in the U.S.

Phase 3 Recruiting Academic/Other

E-Mindfulness Approaches for Living After Breast Cancer

NRG-CC015 is a prospective, randomized phase III clinical trial to evaluate the efficacy of two distinct digital approaches for delivering a mindfulness-based intervention: a live, instructor-led version delivered over Zoom (MAPs LO), and …

Sponsor: NRG Oncology
NCT ID: NCT06748222
Locations:
  • Mayo Clinic Hospital in Arizona — Phoenix, Arizona
  • Mercy Hospital Fort Smith — Fort Smith, Arkansas
  • NEA Baptist Memorial Hospital and Fowler Family Cancer Center - Jonesboro — Jonesboro, Arkansas

+ 378 more sites in the U.S.

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
Locations:
  • NEA Baptist Memorial Hospital and Fowler Family Cancer Center - Jonesboro — Jonesboro, Arkansas
  • Sutter Auburn Faith Hospital — Auburn, California
  • Alta Bates Summit Medical Center-Herrick Campus — Berkeley, California

+ 200 more sites in the U.S.

Phase 3 Recruiting Industry

A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence

The primary goal of this study is to evaluate the effectiveness of elacestrant versus standard endocrine therapy in participants with node-positive, Estrogen Receptor-positive (ER+), Human Epidermal Growth Factor-2 negative (HER2-) early b…

Sponsor: Stemline Therapeutics, Inc.
NCT ID: NCT06492616
Locations:
  • Southern Cancer Center, PC — Daphne, Alabama
  • Ironwood Cancer and Research Centers — Chandler, Arizona
  • Banner MD Anderson Cancer Center — Gilbert, Arizona

+ 173 more sites in the U.S.

Phase 3 Recruiting Industry

A Study of Tersolisib (LY4064809/STX-478) With Other Anti-Cancer Treatments in Participants With Advanced Breast Cancer With a Genetic Change (PIK3CA)

The purpose of the study is to assess the efficacy and safety of the addition of Tersolisib (LY4064809/STX-478) to other anti-cancer drugs as first treatment for advanced hormone receptor-positive (HR+)/human epidermal growth factor recept…

Sponsor: Eli Lilly and Company
NCT ID: NCT07174336
Locations:
  • Alaska Oncology and Hematology — Anchorage, Alaska
  • Ironwood Cancer & Research Centers — Chandler, Arizona
  • St. Joseph's Hospital and Medical Center — Phoenix, Arizona

+ 126 more sites in the U.S.

Phase 3 Recruiting Industry

A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment.

The purpose of this study is to learn about the safety and effects of the study medicine PF-07248144 when given along with fulvestrant for the possible treatment of HR-positive, HER2-negative advanced or metastatic breast cancer. HR-positi…

Sponsor: Pfizer
NCT ID: NCT07062965
Locations:
  • Ironwood Cancer & Research Centers — Chandler, Arizona
  • Ironwood Cancer & Research Centers — Gilbert, Arizona
  • Ironwood Cancer & Research Centers — Glendale, Arizona

+ 99 more sites in the U.S.

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
Locations:
  • Mayo Clinic-Comprehensive Cancer Center-Breast Clinic — Phoenix, Arizona
  • University of Arizona-Cancer Center — Tucson, Arizona
  • Los Angeles cancer Network_Anaheim — Anaheim, California

+ 76 more sites in the U.S.

Phase 3 Recruiting Industry

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 * Early-stage, which means the cancer is in th…

Sponsor: Merck Sharp & Dohme LLC
NCT ID: NCT06966700
Locations:
  • Banner MD Anderson Cancer Center ( Site 0066) — Gilbert, Arizona
  • Mayo Clinic Cancer Center ( Site 0034) — Phoenix, Arizona
  • University of Arizona Cancer Center ( Site 0035) — Tucson, Arizona

+ 61 more sites in the U.S.

Showing 12 of 300 trials. See all on ClinicalTrials.gov

Before you contact a trial site

Trial eligibility criteria are specific and strict. Reading them carefully before calling a site saves time. These guides walk through what to look for.

Medical disclaimer: Information on 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: 2026-10-19