Clinical trials
ER+ Breast Cancer clinical trials
Below are recruiting er+ breast cancer clinical trials, each written for real people, not researchers. We’re tracking 559 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06839001RecruitingPhase 3
Freezing small breast tumors instead of surgery trial
This study tests if freezing a very small early-stage breast tumor (cryoablation) can be as effective as surgery. It may be an option for people whose tumor is small enough and hasn't spread to lymph nodes or elsewhere.
São Paulo, São PauloAges 18 years+ - NCT07242118Recruiting
Radiation therapy for older women with breast cancer
This trial tests a precise, high-dose radiation treatment (called SABR) for older women with early-stage breast cancer who choose not to have surgery. It aims to control the tumor with fewer side effects and may be an option if you have a small, ER+, HER2- tumor that hasn't spread to lymph nodes.
Kansas City, KansasAges 65 years+ - NCT07285382RecruitingPhase 2
Dalpiciclib plus letrozole for advanced HR+ HER2- breast cancer
This trial tests a new combination of two drugs (dalpiciclib and letrozole) as a first treatment for advanced breast cancer that is hormone receptor positive and HER2 negative. It aims to find the best dose to slow or stop cancer growth.
Dalian, LiaoningAges 18–75 - NCT07340424RecruitingEarly Phase 1
Study of 225Ac-TR2205 for triple-negative breast cancer
This trial tests a new radioactive drug called 225Ac-TR2205 for people with triple-negative breast cancer that has spread. The goal is to see if it is safe and tolerable. It may be an option if you have tried at least two other treatments, including one for metastatic disease.
Jinan, ShandongAges 18 years+ - NCT04383275RecruitingPhase 2
De-escalation trial for early HER2+ breast cancer
This Phase 2 study tests whether people with early-stage HER2-positive breast cancer may be treated with less intensive therapy, without losing effectiveness. You may be considered if your tumor is small, lymph nodes are negative, and your hormone (ER/PR) status and HER2 test results match the study groups.
Shanghai, Shanghai MunicipalityAges 18–70 - NCT07117630RecruitingPhase 2
A new drug combo for advanced breast cancer after standard treatment
This trial tests a new drug combination for women with a certain type of advanced breast cancer (HR-positive, HER2-negative) that has worsened after standard treatments like CDK4/6 inhibitors and hormone therapy. It aims to see if the combination can help when other options have stopped working.
ShanghaiAges 18 years+ - NCT05728268RecruitingPhase 2
Test dose-dense chemo before surgery for high-growth hormone-positive breast cancer
This Phase 2 study tests a faster, more frequent chemotherapy schedule given before surgery (neoadjuvant therapy) for certain breast cancers that grow quickly. It may help shrink the tumor before the operation and improve treatment response in people who fit the tumor and health criteria.
Shantou, GuangdongAges 18–70 - NCT05916755Recruiting
Testing tumor clues that predict response to immunotherapy
This study looks for “biomarkers,” or tumor clues, that may help predict who benefits from checkpoint inhibitor immunotherapy in triple-negative breast cancer. It may help doctors choose the right treatment approach in the future, especially when chemotherapy is planned.
BarcelonaAges 18 years+ - NCT06874933RecruitingPhase 2
Chemo plus anlotinib and benmelstobart for HR+/HER2- breast cancer
This trial tests adding anlotinib (a targeted therapy) and benmelstobart (an immunotherapy) to standard chemotherapy before surgery for a specific type of breast cancer. It may help shrink tumors and improve outcomes for patients whose tumors have certain markers.
Hangzhou, ZhejiangAges 18–75 - NCT06894173Recruiting
Early breast cancer treatment evolution study
This study looks back at treatments given to people with triple-negative or HER2-positive early breast cancer between 2016 and 2021. It aims to understand how treatment approaches have changed over time.
Aviano, PNAges 18 years+ - NCT07498478RecruitingPhase 2
Tinengotinib and fulvestrant for advanced HR+ HER2- breast cancer
This trial tests a new drug called tinengotinib combined with the hormone therapy fulvestrant for people with HR-positive, HER2-negative breast cancer that has come back or spread. It is for those who have already tried a CDK4/6 inhibitor and at least one hormone therapy.
Guangzhou, GuangdongAges 18 years+ - NCT06185205RecruitingPhase 2
Accelerated high-dose radiation for early breast cancer
This trial tests a very short, high-dose radiation treatment given directly to the breast after lumpectomy. It aims to make radiation more convenient by finishing in just a few days instead of weeks, possibly with fewer side effects.
Richmond, VirginiaAges 45–79 - NCT04923542RecruitingPhase 1/Phase 2
Targeted drug plus focused brain radiation for breast cancer
This study tests whether abemaciclib (a targeted pill) given with focused radiation to brain tumors can control hormone receptor–positive, HER2-negative breast cancer in the brain. It’s designed to see if the combination helps shrink or slow the growth of brain metastases while keeping side effects manageable.
Tampa, FloridaAges 18 years+ - NCT06889610RecruitingPhase 2
Ablation plus drug therapy for advanced solid tumors
This trial tests combining a liver tumor ablation procedure with systemic drugs for people with advanced colorectal, breast, or melanoma cancer that has spread to the liver. The goal is to see if this approach can help when standard treatments have stopped working.
ShanghaiAges 18–80 - NCT06318897RecruitingPhase 2
Immunotherapy with chemo for early triple-negative breast cancer
This trial tests a combination of an immunotherapy drug (pembrolizumab) plus two chemotherapy drugs (carboplatin and paclitaxel) given before surgery for people with early-stage, triple-negative breast cancer. The goal is to see if this treatment helps shrink or eliminate the tumor before it's removed.
Houston, TexasAges 18 years+ - NCT07402473RecruitingPhase 2
Optimizing treatment before surgery for HER2-positive breast cancer
This trial tests a neoadjuvant (before surgery) treatment plan for people with early-stage HER2-positive breast cancer. The goal is to see if a personalized approach can improve outcomes.
Elizabeth, New JerseyAges 18–90 - NCT05878314Recruiting
Testing how hormones and tumor markers guide breast cancer treatment
This study looks at how planned hormone (endocrine) treatment, the menstrual cycle, and lab markers from the tumor may help doctors choose the best treatment for early-stage, hormone-receptor–positive, HER2-negative breast cancer. It may help personalize decisions, including what to do before surgery.
TübingenAges 18 years+ - NCT07400523RecruitingPhase 3
Ribociclib for breast cancer with leftover disease after chemo
This trial tests ribociclib, a targeted therapy, for women with hormone receptor-positive, HER2-negative breast cancer who still have cancer cells in the breast or lymph nodes after initial chemotherapy. It aims to reduce the chance of cancer coming back.
Zhanjiang, GuangdongAges 18 years+ - NCT06500208RecruitingPhase 2
Adebrelimab plus chemo before surgery for high-risk breast cancer
This trial tests a combination of an immunotherapy drug (adebrelimab) plus chemotherapy before surgery for people with high-risk, hormone receptor-positive, HER2-negative breast cancer. The goal is to see if this approach can shrink tumors more effectively than chemotherapy alone.
Shanghai, Shanghai MunicipalityAges 18–65 - NCT06727487Recruiting
Ovarian suppression and exercise in young breast cancer patients
This trial tests whether adding a supervised exercise program helps women with hormone-positive breast cancer who are receiving ovarian suppression therapy. It looks at how exercise affects treatment side effects, quality of life, and long-term health.
MadridAges 18–45 - NCT04862663RecruitingPhase 3
Capivasertib plus hormone therapy for HR+ breast cancer after progression
This Phase 3 trial studies capivasertib (a targeted pill) plus fulvestrant (a hormone injection) together with a CDK4/6 inhibitor to treat HR+ / HER2- advanced breast cancer that has returned or grown despite earlier hormone therapy. It may help by blocking growth signals linked to cancer cell survival.
Tucson, ArizonaAges 18–99 - NCT06837792RecruitingPhase 2
T-DXd vs hormone therapy for HER2-low advanced breast cancer
This trial compares a targeted antibody-drug conjugate called T-DXd against standard hormone therapy for women with HR+, HER2-low advanced breast cancer that has progressed after first-line endocrine therapy plus a CDK4/6 inhibitor. It aims to see if T-DXd works better than continuing hormone therapy alone.
SeoulAges 19 years+ - NCT04020575RecruitingPhase 1
CAR T cells made from your blood for advanced breast cancer
This Phase 1 trial tests CAR T cells made from your own immune cells to target advanced breast cancer. The cells are designed to recognize a specific cancer marker (called MUC1*), with the goal of shrinking tumors or keeping them under control.
Duarte, CaliforniaAges 18 years+ - NCT04874064Recruiting
AI blood tests for triple-negative breast cancer after treatment
This study uses a computer (AI) to read results from blood tests to look for signs of remaining triple-negative breast cancer, before and/or after surgery. It may help doctors better detect residual tumor and guide follow-up care.
London, OntarioAges 18 years+
Hear when a new ER+ Breast Cancer trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for er+ breast cancer?
- Yes. Clin2 currently lists 559 recruiting er+ 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 er+ 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 er+ 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.