Clinical trials
Breast Cancer Stage I clinical trials
Below are recruiting breast cancer stage i clinical trials, each written for real people, not researchers. We’re tracking 1,202 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06261918Recruiting
Breast cancer study: linking metabolism to tumor behavior
This study looks at how your metabolism (things like blood sugar and cholesterol) might be linked to tumor genes and growth in people with breast cancer. The goal is to find new ways to treat the disease based on your metabolic profile. You may be eligible if you have locally advanced breast cancer (Stage II–III) and are willing to share your medical records.
RomaAges 18 years+ - NCT05887856Enrolling by invitation
Educational program to reduce pre-surgery anxiety in breast cancer
This trial tests whether a specially designed educational program can lower anxiety before breast surgery. It may help you feel more prepared and calmer leading up to the operation.
LahoreAges 18–70 - NCT05708235RecruitingPhase 2
Blood test monitoring for early breast cancer recurrence
This trial uses a blood test to look for tiny bits of tumor DNA after treatment. If found, participants receive new drug combinations to try to prevent cancer from returning.
A CoruñaAges 18 years+ - NCT06393374RecruitingPhase 3
Study of a new drug combination for residual TNBC after initial treatment
This trial tests a new combination of two drugs (sacituzumab tirumotecan and pembrolizumab) compared to standard chemotherapy for people with triple-negative breast cancer that did not fully respond to initial treatment. It aims to see if this combination helps prevent cancer from coming back.
Mobile, AlabamaAges 18 years+ - NCT06467149Recruiting
Comparing Frailty Screenings in Older Breast Cancer Patients
This study compares different ways to check frailty (a measure of how well your body handles stress) in women with breast cancer who are 50 or older. The goal is to find which screening tool best predicts health outcomes during treatment.
ChongqingAges 50 years+ - NCT05232916RecruitingPhase 3
Vaccine for HER2-positive breast cancer after standard treatment
This trial tests a vaccine (GLSI-100) that may help prevent the return of HER2-positive breast cancer. It is given to patients who still had cancer cells after initial treatment with trastuzumab, or who had stage III disease and achieved a complete response.
Mobile, AlabamaAges 18–100 - NCT06169371RecruitingTeam says not enrollingPhase 4
Abemaciclib dose escalation for early breast cancer
This study tests whether women with early-stage HR+/HER2- breast cancer can safely take a higher dose of the drug abemaciclib (Verzenio) after surgery. The goal is to keep the treatment as strong as possible while managing side effects.
Chicago, IllinoisAges 18 years+ - NCT06722599Recruiting
Shorter chemo with targeted drugs for low-risk HER2 breast cancer
This trial tests whether a short course of chemo plus two targeted drugs (trastuzumab and pertuzumab) before surgery works well for people with early-stage, low-risk HER2-positive breast cancer. It may help reduce the need for stronger chemo later.
Beijing, Beijing MunicipalityAges Any age - NCT05464082RecruitingPhase 2
Collect tumor samples to guide early breast cancer recurrence care
This Phase 2 study tests a “precision” approach using tumor sample testing to help predict, prevent, and treat early metastatic recurrence in triple-negative or hormone-receptor–low, HER2-negative breast cancer. If you qualify, you’ll be asked to provide tumor tissue before (or in place of) standard chemotherapy, so researchers can learn which tumor features matter most.
Salt Lake City, UtahAges 18 years+ - NCT04819243RecruitingPhase 2
Test a BRCA-targeted drug plan for advanced ER-positive breast cancer
This Phase 2 study tests how well a treatment plan using palbociclib followed by talazoparib (and possibly atezolizumab) works in certain people with advanced ER-positive breast cancer. It may help by targeting cancer biology linked to BRCA/HRD changes and by strengthening how the cancer is controlled.
Seoul, Gannam-guAges 19 years+ - NCT06754059Recruiting
Pyrotinib with trastuzumab for HER2-positive breast cancer maintenance
This trial tests a combination of two targeted drugs (pyrotinib and trastuzumab) as maintenance therapy to keep HER2-positive breast cancer that has spread under control. It is for women who have already received some first-line treatment and are stable enough to continue therapy.
Fuzhou, FujianAges 18–70 - NCT06923527RecruitingPhase 2
Testing ctDNA to start elacestrant in early breast cancer
This trial tests whether the drug elacestrant can help prevent recurrence in people with a type of breast cancer (ER+/HER2-) who have finished hormone therapy and have signs of cancer DNA in their blood (ctDNA positive) but no visible spread on scans.
New Haven, ConnecticutAges 18 years+ - NCT06966141Recruiting
Real-World Study of Sacituzumab Govitecan for Breast Cancer
This study looks at how well the drug Sacituzumab Govitecan works in real-life settings for people with certain types of advanced breast cancer that have not responded to prior treatments.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT06607757RecruitingPhase 2
Capivasertib plus fulvestrant for high-risk lobular breast cancer
This trial tests adding capivasertib to fulvestrant for women with a certain type of breast cancer (invasive lobular carcinoma) that is hormone-receptor positive and has a high risk of coming back. The treatment is given before surgery to see if it works better than fulvestrant alone.
AugsburgAges 18 years+ - NCT07708571Recruiting
Coaching program for women on ribociclib and aromatase inhibitor
This study tests whether a coaching program based on personality types helps women with early-stage hormone receptor-positive, HER2-negative breast cancer stick to their treatment plan. Participants must be taking ribociclib (Kisqali) and an aromatase inhibitor, and their cancer must not have spread to other organs.
Augsburg, BavariaAges 18 years+ - NCT07311083Recruiting
Lifestyle program for triple-negative breast cancer patients
This study tests a lifestyle program (diet, exercise, and support) for women with triple-negative breast cancer who are getting chemotherapy plus immunotherapy before surgery. The goal is to see if healthy habits can help during treatment.
Essen, North Rhine-WestphaliaAges 18–75 - NCT05525767RecruitingPhase 4
Bevacizumab plus chemo before surgery for HER2-negative breast cancer
This trial studies whether adding bevacizumab (an anti-blood-vessel medicine) to chemotherapy before surgery improves treatment outcomes for people with HER2-negative breast cancer. It’s mainly for tumors that are stage II to IIIC and have not had prior cancer treatment.
Shijiazhuang, HebeiAges 18 years+ - NCT05536128RecruitingPhase 2
Fulvestrant plus DNA damage drugs after CDK4/6 treatment failure
This Phase 2 trial studies whether combining fulvestrant with medicines that block DNA repair can help treat HR+/HER2- metastatic or inoperable breast cancer that has progressed after endocrine therapy plus a CDK4/6 inhibitor. It also aims to check the safety of this combination and see if it can control the cancer for longer.
SeoulAges 19 years+ - NCT06700369Recruiting
Lowering chemo with targeted therapy for HER2+ breast cancer
This study looks at whether using targeted therapy can reduce the amount of chemotherapy needed before surgery for HER2-positive breast cancer. It aims to find a safer, equally effective treatment plan.
Beijing, Beijing MunicipalityAges Any age - NCT06007027Recruiting
Vaginal laser therapy for breast cancer survivors with menopause symptoms
This trial tests whether a vaginal laser treatment can help breast cancer survivors who have menopause-like symptoms such as vaginal dryness or pain during sex. It is designed for women currently on hormone-blocking therapy.
RandersAges 18–100 - NCT06481956Enrolling by invitationPhase 2
T-DM1 plus a CDK4/6 inhibitor (ribociclib) for HER2-positive breast cancer
This clinical trial tests a combination of two targeted therapies for people with HER2-positive breast cancer that has spread or come back. The goal is to see if adding ribociclib to T-DM1 is safe and effective after other treatments have been used.
Hangzhou, ZhejiangAges 18–75 - NCT07180693Recruiting
Breast cancer that returns after CDK4/6 inhibitor treatment
This study looks at patients whose breast cancer returns after starting a CDK4/6 inhibitor (like abemaciclib or ribociclib) along with hormone therapy. The goal is to understand why the cancer comes back and find better ways to treat it.
Bergamo, ItalyAges 18 years+ - NCT07426822RecruitingPhase 2
Preventing Rash and Diarrhea with Capivasertib for Breast Cancer
This trial tests whether giving a combination of the drugs capivasertib and fulvestrant, along with medicines to prevent rash and diarrhea, can help treat hormone receptor-positive breast cancer that has a PIK3CA, AKT1, or PTEN change. It's for people whose cancer has spread or is locally advanced and can't be removed with surgery.
New Haven, ConnecticutAges 18 years+ - NCT05432856Recruiting
Track metabolic health habits during breast cancer treatment
This study follows how “metabolic health” patterns (like eating timing and daily activity) change over time during breast cancer care. It may help researchers learn which habit patterns are linked to better outcomes and comfort during chemotherapy.
Edmonton, AlbertaAges 18 years+
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Common questions
- Are there clinical trials for breast cancer stage i?
- Yes. Clin2 currently lists 1,202 recruiting breast cancer stage i 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 stage i 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 stage i 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
- Breast Cancer Early Stage Breast Cancer (Stage 1-3)
- Breast Cancer (Triple Negative Breast Cancer (TNBC))
- Anatomic Stage IV Breast Cancer AJCC v8
- Anatomic Stage III Breast Cancer AJCC v8
- Anatomic Stage II Breast Cancer AJCC v8
- Anatomic Stage I Breast Cancer AJCC v8
- Early-stage Breast Cancer
- Breast Cancer Stage III
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.