Clinical trials
Breast cancer clinical trials
Cancer that forms in the cells of the breast, the most common cancer in women. We’re tracking 2,473 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04170634Recruiting
CT scan study to assess bone strength in certain cancers
This study uses a CT scan to estimate how strong a cancer-affected bone area is, helping doctors evaluate fracture risk and bone management. It is aimed at adults with bone lesions from several common cancer types.
AngersAges 18 years+ - NCT04258280Recruiting
Genetic counseling support for BRCA-positive mothers
This trial looks at ways to improve genetic counseling for mothers (or primary caregivers) of teens and young adults who are BRCA-positive. It may help you understand genetic results and what they mean for your family, using better counseling support.
Washington D.C., District of ColumbiaAges 18 years+ - NCT04265872RecruitingEarly Phase 1
Bortezomib then pembrolizumab and cisplatin for metastatic triple-negative breast cancer
This early-phase trial tests a new treatment plan for people with metastatic triple-negative breast cancer that has already been treated with standard chemotherapy. It aims to see how well the combination works and whether it’s safe.
Dallas, TexasAges 18 years+ - NCT04303325RecruitingPhase 4
Esketamine after breast surgery for depression and gut changes
This trial studies whether esketamine given around the time of breast cancer surgery can improve depression and change gut bacteria. It also monitors your sleep/deep anesthesia level (with a simple monitoring number).
Shenyang, LiaoningAges 18–65 - NCT04501523RecruitingPhase 2
ctDNA-guided immunotherapy boost after chemotherapy for triple-negative breast cancer
This Phase 2 study checks whether a blood test that looks for cancer DNA (ctDNA) can help decide who should get an extra 12-month immunotherapy treatment after standard chemotherapy and surgery. It may help reduce the chance of the cancer coming back in people with triple-negative breast cancer.
Guandong, GuangdongAges 18–80 - NCT04531696Recruiting
Post-death breast tissue donation study for cancer research
This trial invites adults with certain breast cancer conditions to donate tissue after death. Researchers hope the donated samples will help better understand cancer and improve future treatments.
LeuvenAges 18 years+ - NCT04614194RecruitingPhase 2
Blood and tumor markers to test response to abemaciclib
This trial studies how the immune system and other body signals in blood and tumor tissue relate to how well abemaciclib works before breast cancer surgery. The goal is to learn who benefits most from this medicine and why.
Dallas, TexasAges 18 years+ - NCT04655066Recruiting
Questionnaire study for pelvic floor symptoms during cancer treatment
This study asks people with breast or gynecologic cancer who are receiving cancer treatment to complete a validated questionnaire about how their pelvic floor feels. The goal is to better understand pelvic floor function and symptoms during systemic (whole-body) cancer therapy, which may help future care.
WiesbadenAges 18 years+ - NCT04680442RecruitingPhase 2
Keeping HER2 therapy when your heart function is weaker
This trial studies whether it’s safe to continue HER2-targeted breast cancer treatment (like trastuzumab, pertuzumab, or T-DM1) even when heart function (left ventricle) is reduced. It may help people avoid stopping a helpful cancer medicine because of heart concerns.
Porto Alegre, Rio Grande do SulAges Any age - NCT04803539RecruitingPhase 2/Phase 3
ctDNA-guided booster treatment after chemo for triple-negative breast cancer
This trial uses a blood test called ctDNA to see who is at higher risk after surgery and standard chemotherapy for triple-negative breast cancer. If your ctDNA test is positive, you may receive an extra “boost” treatment to help reduce the chance the cancer returns.
Guandong, GuangdongAges 18–80 - NCT04817566Recruiting
Brain stimulation and training for thinking problems after breast cancer
This study tests whether brain stimulation plus cognitive training can improve thinking and memory problems in women after chemotherapy for breast cancer. It may help if you still feel “foggy” or have trouble concentrating months after treatment.
GreifswaldAges 18–65 - NCT07243002Recruiting
Patient outcomes with ribociclib or abemaciclib for early breast cancer
This study looks at how women and men with stage II or III HR+ HER2- breast cancer do when they start treatment with ribociclib or abemaciclib (combined with hormone therapy) after surgery. Researchers want to understand real-world experiences and results.
LondonAges 18 years+ - NCT04937309Recruiting
Vagus nerve stimulation for nausea from chemo
This trial tests a non-invasive device that stimulates a nerve in your ear to help prevent nausea caused by chemotherapy. It is for people with breast cancer who are about to start a specific type of chemo (anthracycline and cyclophosphamide).
BloisAges 18 years+ - NCT04969835RecruitingPhase 1
Safety and early response study of AVA6000 for solid tumors
This Phase 1 study tests AVA6000 in people with certain solid tumor cancers, mainly to check safety and how the body processes the drug. It also looks for early signs of tumor response to see if it might help further in later studies.
New York, New YorkAges 18 years+ - NCT04994067Recruiting
Registering radiation given during breast-conserving surgery
This study records details about radiation delivered while your surgery is happening for certain early breast cancers or pre-cancers. It may help doctors better understand who benefits most from this “intra-operative” radiation approach.
The Bronx, New YorkAges 18 years+ - NCT05037825Recruiting
Study gut microbes with immune therapy in several solid cancers
This trial looks at how the gut microbiome (the bacteria in your digestive system) relates to outcomes when you take standard immune “checkpoint” cancer medicines. If you’re eligible, they’ll collect stool samples while you receive treatment for certain cancers.
Elizabethtown, KentuckyAges 18 years+ - NCT05142787Recruiting
Magnetic breast marker to guide removal of a lump
This study tests a magnetic marker system (placed in the breast or armpit area) to help surgeons find and remove a suspicious lump or lymph node. If you’re having breast/axillary lesion or node removal, this may help guide the procedure.
BottropAges 18 years+ - NCT05146778Recruiting
Opioid-free anesthesia to reduce long-term post-mastectomy pain
This study tests whether a pain-control approach without opioids (strong pain medicines) can lower persistent pain after mastectomy. It may help people avoid long-term pain and opioid side effects.
SeoulAges 19–80 - NCT05192798RecruitingPhase 2
Albumin-bound chemo plus anti-blood-vessel drugs for TNBC
This Phase 2 study tests a chemotherapy called albumin-bound paclitaxel combined with medicines that block new blood vessel growth (antiangiogenic agents) for women with recurrent or metastatic triple-negative breast cancer. It aims to see whether this combination can better control cancer when it comes back or has spread.
Bengbu, AnhuiAges 18–80 - NCT05196087Recruiting
AI system to monitor cancer treatment progress
This trial tests a non-invasive, AI-based monitoring program for people with solid tumors. It aims to help track how you’re doing during or after curative-intent treatment, using information collected without extra procedures.
Toronto, OntarioAges 18 years+ - NCT05217966Recruiting
Radiation before possible breast surgery for early ER-positive cancer
This study gives radiation to the breast before surgery to see if some people can safely delay or even skip surgery. It targets women with a small, node-negative, ER-positive breast cancer with low genetic risk.
Montreal, QuebecAges 50 years+ - NCT05228951RecruitingPhase 2
Testing four breast cancer medicines for stage II–III ER+/PR+/HER2+ cancer
This trial studies a combination of anti-cancer medicines (including trastuzumab and hormone therapy) for women with stage II–III breast cancer that is ER-, PR-, and HER2-positive. It aims to improve outcomes by attacking the cancer in different ways.
Shenyang, LiaoningAges 18–75 - NCT05241119Recruiting
Lymph node mapping to guide surgery after chemotherapy
This study tests using a special carbon-based tracing method to help doctors check which lymph nodes to treat during surgery after you finish chemotherapy. It may improve how accurately the surgical plan targets cancer in the armpit (axillary) lymph nodes.
Shenyang, LiaoningAges 18–70 - NCT05291507RecruitingEarly Phase 1
MRI-guided focused ultrasound for breast cancer during surgery
This early study tests whether a device that uses focused ultrasound (guided by MRI) can be safely used during surgery for women with invasive breast cancer. It mainly looks at feasibility—whether the treatment can be delivered as planned and is safe.
Salt Lake City, UtahAges 18 years+
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Common questions
- Are there clinical trials for breast cancer?
- Yes. Clin2 currently lists 2,473 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.