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

42
Phase 1
84
Phase 2
18
Phase 3
11
Phase 4
145
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 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

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 Academic/Other

ShortStop-HER2: 12 Months vs. 6 Months of HER2-targeted Medications for People With HER2+ Breast Cancer Who Had a Pathologic Complete Response After Chemotherapy Plus Trastuzumab

This phase III trial compares 6 months of human epidermal growth factor receptor 2 (HER2)-targeted therapy to 12 months of HER2-targeted therapy for the treatment of HER2-positive (+) breast cancer in patients that had a pathologic complet…

Sponsor: Alliance for Clinical Trials in Oncology
NCT ID: NCT06876714
Locations:
  • Cancer Center at Saint Joseph's — Phoenix, Arizona
  • Mayo Clinic Hospital in Arizona — Phoenix, Arizona
  • Mercy Hospital Fort Smith — Fort Smith, Arkansas

+ 677 more sites in the U.S.

Phase 3 Recruiting Academic/Other

Testing Longer Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients With Cancer That Has Spread to the Brain

This phase III trial compares the effectiveness of fractionated stereotactic radiosurgery (FSRS) to usual care stereotactic radiosurgery (SRS) in treating patients with cancer that has spread from where it first started to the brain. Radia…

Sponsor: NRG Oncology
NCT ID: NCT06500455
Locations:
  • Banner University Medical Center - Tucson — Tucson, Arizona
  • University of Arizona Cancer Center-North Campus — Tucson, Arizona
  • Mercy Hospital Fort Smith — Fort Smith, Arkansas

+ 259 more sites in the U.S.

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
Locations:
  • Alabama Oncology — Birmingham, Alabama
  • Clearview Cancer Institute — Huntsville, Alabama
  • Palo Verde Hematology Oncology — Glendale, Arizona

+ 182 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

+ 167 more sites in the U.S.

Phase 3 Recruiting Industry

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 invasive breast cancer-free survival (iBC…

Sponsor: Novartis Pharmaceuticals
NCT ID: NCT05827081
Locations:
  • Central Alabama Research — Birmingham, Alabama
  • Alaska Oncology and Hematology LLC — Anchorage, Alaska
  • Western Reg MC-COH Phoenix — Goodyear, Arizona

+ 82 more sites in the U.S.

Phase 3 Recruiting Industry

A Phase III Study of Dato-DXd With or Without Durvalumab Compared With Investigator's Choice of Chemotherapy in Combination With Pembrolizumab in Patients With PD-L1 Positive Locally Recurrent Inoperable or Metastatic Triple-negative Breast Cancer (TROPION-Breast05)

This is a Phase III, randomised, open-label, 3-arm, multicentre, international study assessing the efficacy and safety of Dato-DXd with or without durvalumab compared with investigator's choice chemotherapy in combination with pembrolizuma…

Sponsor: AstraZeneca
NCT ID: NCT06103864
Locations:
  • Research Site — Daphne, Alabama
  • Research Site — Springdale, Arkansas
  • Research Site — Duarte, California

+ 64 more sites in the U.S.

Phase 3 Recruiting Industry

A Study to Evaluate Efficacy and Safety of Giredestrant Compared With Fulvestrant (Plus a CDK4/6 Inhibitor), in Participants With ER-Positive, HER2-Negative Advanced Breast Cancer Resistant to Adjuvant Endocrine Therapy (pionERA Breast Cancer)

This is a Phase III, randomized, open-label multicenter study that will evaluate the efficacy and safety of giredestrant compared with fulvestrant, both in combination with the investigator's choice of a CDK4/6 inhibitor (palbociclib, ribo…

Sponsor: Hoffmann-La Roche
NCT ID: NCT06065748
Locations:
  • Southern Cancer Center — Daphne, Alabama
  • Sutter Auburn Faith Hospital — Auburn, California
  • La Hematology Oncology Medical Group — Glendale, California

+ 58 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

+ 57 more sites in the U.S.

Phase 3 Recruiting Industry

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 in the first-line setting in participant…

Sponsor: Hoffmann-La Roche
NCT ID: NCT06790693
Locations:
  • City of Hope - Phoenix — Goodyear, Arizona
  • The Dignity Health Cancer Institute — Phoenix, Arizona
  • Disney Family Cancer Center — Burbank, California

+ 56 more sites in the U.S.

Phase 3 Recruiting Academic/Other

Testing Proton Craniospinal Radiation Therapy Versus the Usual Radiation Therapy for Leptomeningeal Metastasis, RADIATE-LM Trial

This phase III trial compares proton craniospinal irradiation (pCSI) to involved-field radiation therapy (IFRT) for the treatment of breast or non-small cell lung cancer that has spread from where it first started to the cerebrospinal flui…

Sponsor: NRG Oncology
NCT ID: NCT06500481
Locations:
  • Mayo Clinic Hospital in Arizona — Phoenix, Arizona
  • University of Arkansas for Medical Sciences — Little Rock, Arkansas
  • UC San Diego Health System - Encinitas — Encinitas, California

+ 55 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: 2026-08-17