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 1,194 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07357298RecruitingPhase 3
Brain MRI surveillance for stage IV breast cancer
This trial tests whether regular brain MRI scans can help detect brain metastases early in patients with stage IV breast cancer who do not yet have any known brain metastases. The goal is to see if early detection improves outcomes.
Miami, FloridaAges 18 years+ - NCT07365267Recruiting
3D printed mesh for breast reconstruction after mastectomy
This trial tests a new 3D printed biodegradable mesh used during breast reconstruction right after a mastectomy for breast cancer. It aims to see how well the mesh works for cosmetic results and safety.
Xi'an, ShaanxiAges 18–70 - NCT07371208RecruitingPhase 2
Sac-TMT plus immunotherapy before surgery for triple-negative breast cancer
This study tests a combination of two drugs—Sacituzumab Tirumotecan (Sac-TMT) and an immunotherapy called KL-A167—given before surgery to shrink triple-negative breast tumors. It aims to improve outcomes for people with early-stage, high-risk breast cancer who have not yet had any treatment.
Shanghai, Shanghai MunicipalityAges 18–65 - NCT07371585RecruitingPhase 2
Trastuzumab Deruxtecan for first-line HER2-positive advanced breast cancer
This trial tests a targeted therapy called Trastuzumab Deruxtecan (T-DXd) for people with HER2-positive breast cancer that has spread or cannot be removed. It is for those who have not yet received any chemotherapy or HER2-targeted treatment for metastatic disease. The study also focuses on managing side effects early, using digital tools to track symptoms.
VillejuifAges 18 years+ - NCT07373782RecruitingPhase 2/Phase 3
CPAP mask during radiation for breast cancer
This trial tests whether using a CPAP mask during daily radiation treatments for breast cancer can help protect your heart. It is for women who had a lumpectomy and need radiation to the left breast or to the right breast with lymph nodes.
LeuvenAges 40–80 - NCT07387445Recruiting
Time-Restricted Eating During Breast Cancer Chemotherapy
This trial tests whether eating only during certain hours of the day (time-restricted eating) is doable and helpful for people receiving chemotherapy for breast cancer. The goal is to see if this eating pattern can be a safe way to support your health during treatment.
Chicago, IllinoisAges 25–99 - NCT01042379RecruitingPhase 2
Adaptive drug trial for newly diagnosed breast cancer
This study tests personalized, changing treatment plans (given before surgery) to find better options for your specific breast tumor. You may be asked for extra breast-tissue testing to help match you with the most suitable study drug(s).
Birmingham, AlabamaAges 18 years+ - NCT01503190Recruiting
Study of how breast cancer affects the immune system
This study looks at how the immune system changes in people with breast cancer, using patient tissue samples. It may help researchers understand immune responses in young women and guide future cancer treatments.
Aurora, ColoradoAges 18 years+ - NCT01785420RecruitingPhase 3
Trastuzumab before breast surgery for HER2-positive cancer
This trial tests whether giving trastuzumab before surgery can improve outcomes for people with HER2-positive early breast cancer. Trastuzumab is a targeted medicine that helps treat HER2-driven cancer before the tumor is removed.
MumbaiAges 18–80 - NCT00353483Recruiting
Testing treatment before or after breast cancer surgery
This trial studies how different cancer treatments given before or after standard therapy affect breast cancer cells in the blood and bone marrow. It may help doctors better understand how treatments work throughout the body, not just where the tumor is.
St Louis, MissouriAges 18 years+ - NCT01185132RecruitingPhase 3
IMRT versus partial-breast radiation after lumpectomy
This study compares two different ways of giving radiation to the breast after lumpectomy for early-stage breast cancer. It may help determine which approach controls the cancer well while reducing radiation to surrounding healthy tissue.
Aurora, ColoradoAges 40 years+ - NCT01766297RecruitingPhase 2
Proton radiation after lumpectomy for early breast cancer
This trial studies a type of radiation made with protons to treat only part of the breast after surgery (lumpectomy) for early-stage breast cancer. It may help control the cancer while aiming to reduce radiation to surrounding tissues.
Scottsdale, ArizonaAges 50 years+ - NCT01840293Recruiting
Breast cancer study using tumor tissue to find key differences
This trial looks at breast cancer “proteins” and molecular features using tumor samples taken during surgery or biopsy. The goal is to better understand why breast cancers behave differently, which may help guide more personalized treatment in the future.
CorkAges 18 years+ - NCT02732860Recruiting
Test your tumor’s drug response using a lab model
This trial grows a lab model from your own tumor tissue (or resected tissue) to predict which drugs might work best. It’s meant to match investigational treatments to your specific tumor biology.
Toronto, OntarioAges 18 years+ - NCT02772367Recruiting
Make heart muscle cells from blood or skin in breast cancer
This study grows heart muscle cells from your blood or skin to better understand why some people develop heart problems from HER2 cancer treatments. You may be helping researchers learn how to predict and prevent treatment-related heart damage.
New York, New YorkAges 18 years+ - NCT02918474Recruiting
Decision tool for mastectomy choices in new breast cancer
This study tests a decision-making tool to help people with newly diagnosed breast cancer make choices about removing the other (opposite) breast as a preventive step. It may help you think through risks and options in a clearer, more structured way.
Houston, TexasAges 18 years+ - NCT02302742Recruiting
Registry for triple-negative breast cancer and inherited mutation carriers
This registry studies people with triple-negative breast cancer or inherited “HBOC” gene mutations (like BRCA, PALB2, PTEN, TP53). It collects information to better understand risk, outcomes, and how these cancers behave—helping future research and care.
Hays, KansasAges Any age - NCT02535221RecruitingPhase 3
Hormone treatment vs chemotherapy before breast surgery
This Phase 3 trial compares hormone-based treatment versus chemotherapy given before surgery in people who are premenopausal and have hormone-receptor positive, HER2-negative breast cancer. It looks to see which approach works better to control the cancer before the breast operation.
BeijingAges 35–55 - NCT02734537RecruitingPhase 2
Radiation with or without cisplatin after head and neck surgery
This trial studies whether adding cisplatin (a chemotherapy medicine) to radiation therapy helps people with stage III–IVA squamous cell cancer of the head and neck after they’ve had surgery. It’s meant to lower the risk of the cancer coming back.
Birmingham, AlabamaAges 18 years+ - NCT02945579Recruiting
Testing skipping breast surgery or radiation for top responders
This trial studies whether some people with early-stage breast cancer who respond extremely well to hormone/chemo/targeted treatment can safely skip breast surgery and/or radiation. It aims to reduce side effects without increasing cancer risk in carefully selected patients.
Gilbert, ArizonaAges 30 years+ - NCT05136846RecruitingPhase 1
Papaverine with chemoradiation for stage II–III lung cancer
This early-phase trial tests whether adding papaverine to standard chemoradiation can improve treatment for stage II–III non-small cell lung cancer (and some limited stage IV cases). It aims to see if the combination is safe and tolerable while targeting the cancer with radiation and chemotherapy.
Duarte, CaliforniaAges 18 years+ - NCT07676461Recruiting
Microbiome study in advanced cancer patients starting immunotherapy
This study looks at the bacteria in your mouth, gut, and tumors to see if they affect how well first-line immunotherapy works. It is for people with advanced stomach, colorectal, breast, cervical, or head-and-neck cancer.
Bogotá, Bogota D.C.Ages 18 years+ - NCT07527689Recruiting
Faster vs. Standard Radiation After Breast Cancer Surgery
This study compares two radiation schedules for breast cancer patients at high risk of cancer returning in lymph nodes. Both use modern radiation therapy, but one delivers treatment faster (ultra-hypofractionated) while the other uses a more moderate schedule. The goal is to see which approach works better with fewer side effects.
ShanghaiAges 18 years+ - NCT00823654Recruiting
Blood tests during treatment to track ovarian egg supply
This study measures blood biomarkers to understand how breast cancer treatment affects a person’s future fertility (ovarian reserve). It may help patients learn more about egg supply changes after chemotherapy and hormone-related treatments.
Basking Ridge, New JerseyAges 18–44
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Common questions
- Are there clinical trials for breast cancer stage i?
- Yes. Clin2 currently lists 1,194 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.