Clinical trials
Breast cancer clinical trials
Cancer that forms in the cells of the breast, the most common cancer in women. We’re tracking 2,460 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04261244RecruitingPhase 3
Neoadjuvant radiation study for one-sided breast cancer
This Phase 3 study tests a specific plan that combines chemotherapy (and sometimes targeted medicines) with radiation before surgery for one breast. It may help shrink breast cancer and improve treatment timing, based on how well tumors respond.
AhausAges 18 years+ - NCT04263298RecruitingPhase 3
Fulvestrant or capecitabine after chemo for metastatic breast cancer
This Phase 3 trial compares two medicines—fulvestrant versus capecitabine—as “maintenance” treatment after your first chemo helps control metastatic breast cancer. It aims to see which one helps people live longer with better disease control.
Guangzhou, GuangdongAges 18–75 - NCT04373655Recruiting
Lymph node surgery after chemotherapy for invasive breast cancer
This trial studies how doctors should operate on lymph nodes after you finish chemotherapy given before surgery. It may help improve treatment planning for people whose breast cancer has spread to nearby lymph nodes, but not to distant organs.
Esslingen am NeckarAges 18 years+ - NCT04472845Recruiting
Shorter or longer breast radiation after surgery for high-risk cancer
This trial compares two schedules of radiation after breast surgery in people with high-risk, node-positive breast cancer. The goal is to see whether giving radiation in 1 week or 2 weeks works well and is safe after standard treatments.
ChandigarhAges 18 years+ - NCT04843865Recruiting
Chinese herbal add-on for joint pain from letrozole
This trial studies whether Chinese herbs, used alongside letrozole, can reduce ongoing joint and muscle pain or stiffness in postmenopausal women with hormone-receptor positive breast cancer. It’s mainly for people whose pain started or worsened after beginning letrozole and who have completed cancer treatments.
Bukit Bintang, Kuala LumpurAges 18 years+ - NCT04914663Recruiting
Exercise program during breast cancer chemotherapy
This study tests whether supervised exercise during chemotherapy is safe and helpful for people with early-stage breast cancer. It may support physical function and well-being while you are receiving cancer treatment.
Gainesville, FloridaAges 18–85 - NCT04933266Recruiting
Nerve block plan for breast surgery
This trial studies a type of pain-control injection (a nerve block) to help with anesthesia during breast cancer surgery. It may help improve comfort and reduce pain around the operation.
Sheung Shui, New TerritoriesAges 18–80 - NCT04990921RecruitingPhase 2
Palliative radiation plus pembrolizumab for metastatic breast cancer
This trial studies whether adding a focused, comfort-focused form of radiation (SBRT) to pembrolizumab can help people with stage IV breast cancer that cannot be removed with surgery. You may be eligible if you can receive palliative SBRT and have measurable tumors, and if you meet prior-therapy and blood/health criteria.
Louisville, KentuckyAges 18 years+ - NCT05035836RecruitingPhase 2
Test drug after early HER2-positive breast cancer surgery
This trial tests zanidatamab, a type of targeted antibody treatment, in people with early-stage HER2-positive breast cancer to see how well it works and how safe it is. Because it’s a single-arm pilot study, everyone in the study gets the drug, and you’ll likely be asked to undergo standard surgery if appropriate.
Houston, TexasAges 18 years+ - NCT05057598Recruiting
Online study for women with breast cancer experiences
This study asks women with breast cancer to take part in an online, before-and-after research project. It may help researchers understand your experiences and improve support for people living with breast cancer, including those with relapse or spread to other parts of the body.
Milan, MIAges 18–90 - NCT05074290RecruitingPhase 1/Phase 2
Testing safety and drug levels of a breast cancer drug plus taxane
This early-phase study tests how epidiferphane works in the body and whether it is safe when combined with standard chemotherapy “taxanes” (paclitaxel or docetaxel) for breast cancer. If you qualify, you may be starting a new taxane treatment plan at the study site, and you would be followed closely for side effects and drug levels.
Gainesville, FloridaAges 18–99 - NCT05205200RecruitingPhase 2
Immune therapy for HR-positive, HER2-negative metastatic breast cancer
This Phase 2 trial studies an immune-based treatment for women with HR-positive and HER2-negative breast cancer that has spread or returned and can’t be cured with local treatment alone. The goal is to see whether the therapy can shrink tumors and improve disease control with acceptable safety.
ShanghaiAges 18–75 - NCT05317221Recruiting
Developing breast cancer tissue models for research
This trial builds lab “models” (called organoids) from breast cancer tissue to help researchers study different breast cancer types. You may be able to help by providing consent and meeting the study’s basic cancer and treatment history requirements.
MaastrichtAges 18 years+ - NCT05334459Recruiting
Radiation and medicines after surgery for new metastatic breast cancer
This trial looks at giving radiation and anti-cancer medicines after surgery to treat newly diagnosed (de novo) metastatic breast cancer. It may help patients by improving local control of the breast area while also treating cancer throughout the body.
AnkaraAges 18–80 - NCT05369546Recruiting
Imaging study for suspicious breast findings
This study looks at how detailed breast imaging can help diagnose breast cancer when a mammogram is suspicious. If your mammogram result was “highly suspicious” and you have not had a biopsy yet, the trial may be able to use your images to improve future diagnosis.
Tampa, FloridaAges 20–85 - NCT05404321Recruiting
Collecting tumor samples to study triple-negative breast cancer treatments
This study collects tumor tissue from people with early-stage triple-negative breast cancer before they start neoadjuvant chemotherapy. The goal is to help researchers test new therapies and look for markers that may predict who benefits.
CaenAges 18 years+ - NCT05483283Recruiting
Latina women study to help access breast cancer care
This trial supports Latina women who have higher breast cancer risk and face added barriers (like cost, transportation, safety, or isolation) to get recommended breast screening and genetic risk information. It aims to help you understand your risk and access care when it’s due.
Chicago, IllinoisAges 30 years+ - NCT05491395Recruiting
Radiation after mastectomy with breast implant reconstruction
This trial studies a radiation schedule given after breast cancer surgery when your breast was rebuilt right away with a prosthesis (implant or similar). It aims to see whether this “hypofractionated” (fewer, larger treatment sessions) radiation approach is appropriate for patients who need additional (adjuvant) radiation to reduce recurrence risk.
Barretos, São PauloAges 18 years+ - NCT05490472RecruitingPhase 1/Phase 2
Study drug for advanced solid tumors that stopped responding
This early study tests a new medicine (JAB-2485) in adults with advanced solid tumors (cancers that have spread or grown locally). You may join to see if it can shrink tumors or control the disease when other treatments haven’t worked or weren’t tolerated.
Detroit, MichiganAges 18 years+ - NCT05501704RecruitingPhase 2
Testosterone-blocking therapy for male breast cancer
This Phase 2 study tests an oral treatment (called “ET”) to treat hormone-receptor–positive, HER2-negative invasive breast cancer in men. It may help shrink or control cancer without using standard cancer treatments first.
Washington D.C., District of ColumbiaAges 18 years+ - NCT05528133RecruitingPhase 2
Personalized radiation based on tumor genetics in triple-negative breast cancer
This trial tests whether using tumor “genetics” (information from your biopsy) to guide radiation planning can improve treatment for triple-negative breast cancer. It may help by aiming radiation more precisely while still using standard approaches where needed.
Clearwater, FloridaAges 18 years+ - NCT05627960RecruitingPhase 1
Testing an antibody drug for advanced solid cancers
This Phase 1 study tests AG01, an antibody that targets a cancer protein called GP88, in people with advanced solid tumors. The goal is to find safe doses and learn whether it can help certain cancers.
Baltimore, MarylandAges 18 years+ - NCT05740956RecruitingPhase 1
Drug study for cancers with HRR gene or HRD changes
This Phase 1 study tests HS-10502 in people with advanced solid tumors that have certain DNA repair problems (HRR or HRD). It may help by finding a safe dose and seeing whether the drug can shrink tumors in cancers that have specific genetic features.
Beijing, Beijing MunicipalityAges 18–75 - NCT05753657RecruitingEarly Phase 1
Testing insulin and blood sugar monitoring with pioglitazone
This early study tests whether adding pioglitazone, along with close blood-sugar (glucose/insulin) monitoring, can help control high insulin and high blood sugar in people starting alpelisib for metastatic breast cancer. It may help reduce blood-sugar side effects from alpelisib.
HaifaAges 18–85
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Common questions
- Are there clinical trials for breast cancer?
- Yes. Clin2 currently lists 2,460 recruiting breast cancer studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a breast cancer trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a breast cancer trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.