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Clinical Research Directory

Browse clinical research sites, groups, and studies.

230 clinical studies listed.

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Metastatic Breast Cancer

Tundra lists 230 Metastatic Breast Cancer clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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ACTIVE NOT RECRUITING

NCT07342309

Real-World Treatment Patterns and Outcomes in HER2-Altered Metastatic Breast Cancer Patients in the United States

This study aims to address the following key objectives in patients with HER2-altered mBC: Primary objectives * Estimate the prevalence of human epidermal growth factor receptor 2 positive (HER2+), human epidermal growth factor receptor 2 (HER2) mutation, cooccurrence of HER2+ and HER2 mutation among adult patients with metastatic breast cancer (mBC) * Among mBC patients with HER2+ and HER2 mutation, describe the following: * Baseline demographic and clinical characteristics * Treatment patterns during follow-up including 1L through fifth-line (5L) settings * Real-world overall survival (rwOS) for 1L through 5L Secondary objectives \- Among mBC patients with HER2+ and HER2 mutation, examine the following (as permissible in the study data): * Real-world progression-free survival (rwPFS) * Real-world time to discontinuation (rwTTD) * Real-world time to next treatment (rwTTNT) * Real-world overall response rate (rwORR)

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-14

1 state

Metastatic Breast Cancer
ACTIVE NOT RECRUITING

NCT06557148

A Study Comparing Cancer Imaging Approaches in People With Lobular Breast Cancer

The purpose of this study to compare two types of cancer imaging scans to see which is better at detecting and monitoring metastatic ILC. This study will compare PET/CT (positron emission tomography/computed tomography) scans using the radiotracer fluorine 18 (18F)-fluoroestradiol (FES) with a standard imaging approach for detecting and monitoring ILC, PET/CT scans using the radiotracer 18F-fluorodeoxyglucose (FDG). These scans will be referred to as FES PET/CT scans and FDG PET/CT scans.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-14

2 states

Breast Cancer
Lobular Breast Carcinoma
Breast Carcinoma
+3
ACTIVE NOT RECRUITING

NCT07386938

A Study of the Efficacy, Safety and Pharmacokinetics of RPH-051 and Perjeta® in Combination With Trastuzumab and Docetaxel as the 1st Line Therapy in Patients With HER2-positive Breast Cancer

The main purpose of this study is to prove non-inferiority, as well as to demonstrate the comparability of safety and immunogenicity of RPH-051 and Perjeta® in combination with trastuzumab and docetaxel as the 1st line therapy for patients with HER2-positive breast cancer (BC). Secondary Purposes are to evaluate the pharmacokinetics of RPH-051 in comparison with Perjeta® after a single-dose and repeated intravenous administration

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-07-14

2 states

Locally Advanced Breast Cancer
Metastatic Breast Cancer
RECRUITING

NCT07624617

Fast-Her: Fasting Effects on Breast Cancer Treatment

We hypothesize that promoting a fasting state will strengthen the anti-cancer effects of PI3K inhibitors in metastatic breast cancer (MBC) treatment. The primary objective of this study is to assess acceptability of prolonged fasting in this population.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-13

1 state

Metastatic Breast Cancer
ACTIVE NOT RECRUITING

NCT06428396

Study of Belzutifan (MK-6482) Plus Fulvestrant for ER+/HER2- Metastatic Breast Cancer (MK-6482-029/LITESPARK-029)

The purpose of this study is to assess the efficacy and safety of belzutifan (MK-6482) plus fulvestrant compared to everolimus plus endocrine therapy (ET) (investigator's choice of fulvestrant or exemestane) in adults with estrogen receptor-positive, human epidermal growth factor receptor 2-negative (ER+/HER2-) unresectable metastatic breast cancer. There is no formal hypothesis testing in this study.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-10

25 states

Metastatic Breast Cancer
RECRUITING

NCT06120283

BGB-43395 Alone or as Part of Combination Therapies in Participants With Breast Cancer and Other Advanced Solid Tumors

This is a dose escalation and dose expansion study to compare how well BGB-43395, a selective cyclin-dependent kinase 4 (CDK4) inhibitor, works as monotherapy or in combination with fulvestrant, letrozole, or elacestrant in participants with hormone receptor positive (HR+) and human epidermal growth factor 2 negative (HER2-) breast cancer (BC) and other advanced solid tumors. The main purpose of this study is to explore the recommended dosing for BGB-43395.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-10

25 states

Advanced Solid Tumor
Advanced Breast Cancer
Metastatic Breast Cancer
+6
RECRUITING

NCT05534438

A Study on Adding Precisely Targeted Radiation Therapy (Stereotactic Body Radiation Therapy) to the Usual Treatment Approach (Drug Therapy) in People With Breast Cancer

The purpose of this study is to see if using Stereotactic Body Radiation Therapy/SBRT to treat a single metastatic site where cancer has worsened may be an effective treatment for people with oligometastatic breast cancer. Participants will stay on their usual drug therapy while they receive SBRT. This combination of SBRT to a single metastatic site and usual drug therapy may prevent participants' cancer from worsening in other metastatic sites or spreading.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-10

3 states

Oligometastatic Breast Carcinoma
Breast Cancer
Metastatic Breast Cancer
+3
RECRUITING

NCT07347600

A Study to Evaluate the Effectiveness and Safety of Inavolisib in Participants With Endocrine-resistant, PIK3CA-mutated, Hormone Receptor-positive, HER2-negative Locally Advanced or Metastatic Breast Cancer

The main purpose of this study is to evaluate the effectiveness of inavolisib based regimen in participants with endocrine-resistant, phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha gene (PIK3CA)-mutated, hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) locally advanced or metastatic breast cancer (LA/mBC), following on or after completing adjuvant endocrine therapy in routine clinical practice in China.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-10

4 states

Locally Advanced Breast Cancer
Metastatic Breast Cancer
RECRUITING

NCT06324357

Beamion BCGC-1: A Study to Find a Suitable Dose of Zongertinib Used Alone and in Combination With Other Treatments to Test Whether it Helps People With Different Types of HER2+ Cancer That Has Spread

This study is open to adults aged 18 years and older with different types of HER2+ cancer that has spread and cannot be removed by surgery. People can take part in this study if their tumours show HER2 aberrations and previous treatment was not successful. The purpose of this study is to find a suitable dose of zongertinib that people with different types of HER2+ cancer that has spread can tolerate best when taken together with trastuzumab deruxtecan (T-DXd), with trastuzumab emtansine (T-DM1), with trastuzumab and capecitabine, with zanidatamab, or with mFOLFOX6 (with or without trastuzumab). Another purpose is to check whether zongertinib alone and in combination with other treatments can make tumours shrink. Zongertinib inhibits HER2. HER2 causes cancer cells to grow. In this study, participants receive treatment in cycles. Study participants are treated with zongertinib alone or in combination with other treatments. This study has 2 parts. In Part 1, participants in different groups receive increasing doses of zongertinib. In Part 2, participants are put into different groups by chance. Each group receives a different dose of zongertinib. Every participant has an equal chance of being in each group. During the study, the participants visit the study site regularly. In this study, researchers want to find the highest dose of zongertinib that participants can tolerate when taken together with other treatments. To find this out, researchers look at certain severe health problems that a number of participants have. The doctors regularly check the size of the tumour with imaging methods (CT/MRI) during the study. The doctors also regularly check participants' health and take note of any unwanted effects.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-09

15 states

Metastatic Breast Cancer
Metastatic Gastric Adenocarcinoma
Gastroesophageal Junction Adenocarcinoma
+2
RECRUITING

NCT06982521

Phase 3 Study of RLY-2608 + Fulvestrant vs Capivasertib + Fulvestrant as Treatment for Locally Advanced or Metastatic PIK3CA-mutant HR+/HER2- Breast Cancer

This is a global, multicenter, open-label, randomized Phase 3 study comparing the efficacy and safety of RLY-2608 + fulvestrant to capivasertib + fulvestrant for the treatment of patients with HR+/HER2- ABC with PIK3CA mutation following recurrence or progression on or after treatment with a CDK4/6 inhibitor.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-08

33 states

PIK3CA Mutation
HER2- Negative Breast Cancer
Hormone Receptor Positive Tumor
+3
COMPLETED

NCT06386263

HER-TEMPO - Real World Treatment-related Outcomes on T-DXd in Canada

Trastuzumab deruxtecan (T-DXd) has been studied in multiple global prospective DESTINY-Breast trials and has a marketing authorization from Health Canada for patients with HER2-positive metastatic breast cancer (mBC) and HER2-low mBC, respectively. Multiple stakeholders, including clinicians, patients, regulators, and healthcare decision makers, are interested in real-world treatment-related outcomes in order to better represent the effectiveness of therapies in routine care settings.

Gender: All

Ages: 18 Years - 130 Years

Updated: 2026-07-08

1 state

Unresectable Breast Cancer
Metastatic Breast Cancer
HER2-low Expressing Breast Cancer
+1
NOT YET RECRUITING

NCT07619365

Trastuzumab Deruxtecan and Lovastatin in HER2-low and Ultralow Advanced or Metastatic Breast Cancer

The purpose of this study is to evaluate use of lovastatin, a drug that may lower CAV-1 levels, in order to increase HER2 expression on cells and enhance the uptake and efficacy of trastuzumab deruxtecan (T-DXd) in HER2-low and ultralow advanced metastatic breast cancer. Trastuzumab deruxtecan (T-DXd) is an FDA approved antibody drug conjugate for HER2-low and ultralow breast cancer and lovastatin is a cholesterol lowering agent.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-08

1 state

Breast Cancer
Advanced Breast Cancer
Metastatic Breast Cancer
RECRUITING

NCT06110793

A Study of Lenvatinib, Pembrolizumab, and Fulvestrant in People With Breast Cancer

The purpose of this study is to test whether the combination of lenvatinib, pembrolizumab, and fulvestrant is a safe and effective treatment that causes few or mild side effects in people with ER+/HER2- metastatic breast cancer.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-06

2 states

Metastatic Breast Cancer
NOT YET RECRUITING

NCT07512271

Generative AI Patient Education Module for Breast Oncology

This study evaluates the safety, accuracy, and impact of an artificial intelligence (AI) tool designed to support patient education in breast cancer care for breast oncology patients under selected physicians care within the University of California, San Francisco breast cancer center and affiliate sites.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-06

1 state

Breast Cancer
Metastatic Breast Cancer
Carcinoma of the Breast
NOT YET RECRUITING

NCT07487844

Pulsed Electric Field Ablation for Metastatic Breast Cancer

This is a phase I trial of the safety of image-guided pulsed electric field (PEF) ablation for the locoregional treatment of superficial soft tissue lesions in adults with metastatic breast cancer using the AliyaTM Pulsed Electric Field System.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-06

1 state

Metastatic Breast Cancer
Breast Cancer
RECRUITING

NCT06062498

Elacestrant vs Elacestrant Plus a CDK4/6 Inhibitor in Patients With ERpositive/HER2-negative Advanced or Metastatic Breast Cancer

Breast cancer is not only the leading cause of cancer in women, but also the leading cause of cancer deaths in women. Estrogen receptor-positive and HER2-negative breast cancer is the most prevalent breast cancer subtype. Endocrine therapy is the mainstay of treatment; however, due to the varied nature of the disease, development of resistance to this therapeutic approach is very common in the metastatic setting. The purpose of this study is to see whether the effectiveness of elacestrant can be enhanced by combining it with a targeted agent such as a CDK4/6 inhibitor to treat patients with ER+/HER2- or metastatic breast cancer with prior exposure to a CDK4/6 inhibitor.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-02

1 state

Estrogen-receptor-positive Breast Cancer
HER2/Neu-Negative Breast Cancer
Advanced Breast Cancerv
+1
RECRUITING

NCT05964504

Improving Survival for Metastatic Lobular Breast Cancer (PLUMB Registry)

This is a prospective observational registry for patients with invasive lobular carcinoma (ILC) of the breast. After the first 1cohort is enrolled, the collected data will be utilized to develop an ILC specific response assessment tool.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-02

3 states

Metastatic Breast Cancer
Lobular Breast Carcinoma
ACTIVE NOT RECRUITING

NCT06157892

A Study of Disitamab Vedotin With Other Anticancer Drugs in Solid Tumors

This clinical trial is studying solid tumor cancers. A solid tumor is one that starts in part of your body like your lungs or liver instead of your blood. Once they've grown bigger in one spot or spread to other parts of the body, they're harder to treat. This is called advanced or metastatic cancer. Participants in this study must have breast cancer or gastric cancer. Participants must have tumors that have HER2 on them. This allows the cancer to grow more quickly or spread faster. There are few treatment options for patients with advanced or metastatic solid tumors that express HER2. This clinical trial uses an experimental drug called disitamab vedotin (DV). Disitamab vedotin is a type of antibody drug conjugate or ADC. ADCs are designed to stick to cancer cells and kill them. This clinical trial uses a drug called tucatinib, which has been approved to treat cancer in the United States and some other countries. This drug is sold under the brand name TUKYSA®. This study will test how safe and how well DV with tucatinib works for participants with solid tumors. This study will also test what side effects happen when participants take these drugs. A side effect is anything a drug does to the body besides treating the disease.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-02

33 states

Breast Neoplasms
Gastroesophageal Junction Adenocarcinoma
HER2 Low Breast Neoplasms
+7
RECRUITING

NCT02422641

Prospective Evaluation Of High-Dose Systemic Methotrexate In Patients With Breast Cancer And Leptomeningeal Metastasis

This study is a prospective evaluation of systemic, intravenous high-dose methotrexate (HD-MTX, 8 g/m2) in patients with triple negative, HER2-positive, and hormone refractory breast cancer with leptomeningeal metastasis (LMD) with or without brain parenchymal involvement.

Gender: All

Ages: 18 Years - Any

Updated: 2026-07-02

3 states

Metastatic Breast Cancer
Leptomeningeal Disease
RECRUITING

NCT06417801

Minimally Interventional Study on Prevalence of Emerging ESR1 Mutations in Liquid Biopsy in Three Cohorts of Patients With Breast Cancer in Comparison With Patient's Baseline ESR1 Mutation Status as Defined by Tissue Profiling.

Minimally interventional study on prevalence of emerging ESR1 mutations in liquid biopsy in three cohorts of patients with breast cancer (with and without prior therapies in metastatic setting, and during first-line aromatase inhibitor plus CDK4/6 inhibitor therapy) in comparison with patient's baseline ESR1 mutation status as defined by tissue profiling.

Gender: All

Ages: 18 Years - 100 Years

Updated: 2026-06-30

2 states

Metastatic Breast Cancer
RECRUITING

NCT06377852

The CDK4/6 Inhibitor Dosing Knowledge (CDK) Study

The purpose of this study is to generate evidence on an alternative dosing strategy for CDK4/6 inhibitors to help more patients with Metastatic Breast Cancer (MBC) (age ≥ 65 years) tolerate side effects and stay on treatment longer, to derive the most clinical benefit from these drugs. The primary objective of the CDK Study is to compare time to treatment discontinuation (TTD) on the approved dosing for palbociclib (125 mg orally daily on days 1-21 of 28-day cycle) or ribociclib (600 mg orally daily on days 1-21 of 28-day cycle) vs. TTD using titrated dosing approach with the same schedule but starting at a lower dose of palbociclib (100 mg or 75 mg) or ribociclib (400 mg or 200 mg) and escalating the dose if well-tolerated in combination with provider/patient choice endocrine therapy (aromatase inhibitor (AI) or fulvestrant) in patients age 65 or older with HR+/HER2- MBC. The secondary and exploratory objectives will generate evidence needed to personalize treatment decisions by comparing patient-centric secondary outcomes and evaluating baseline factors. Together with their treating physician, participants will choose the CDK4/6 inhibitor (palbociclib or ribociclib) and which endocrine therapy (aromatase inhibitor or fulvestrant) of their choice but will be randomized to either Arm 1 (indicated dosing) or Arm 2 (titrated dosing). Note: Telehealth visits are allowed at any time per institutional guidelines. In addition, the study allows for remote consenting per institutional guidelines.

Gender: All

Ages: 65 Years - Any

Updated: 2026-06-29

17 states

Metastatic Breast Cancer
RECRUITING

NCT05945732

DESTINY Breast Respond HER2-(Ultra)Low Europe

Trastuzumab deruxtecan (T-DXd) as monotherapy is indicated for the treatment of adult patients with unresectable or metastatic HER2-low breast cancer who have received prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy. Based on the extended therapeutic indication of Trastuzumab deruxtecan (Enhertu®), a new patient population will be enrolled, comprising adult patients with unresectable or metastatic HR-positive, HER2-low, or HER2-(ultra)low breast cancer who have received at least one endocrine therapy in the metastatic setting and are not considered suitable for endocrine therapy as the next line of treatment.

Gender: All

Ages: 18 Years - Any

Updated: 2026-06-29

Unresectable Breast Cancer
Metastatic Breast Cancer
HER2-low Expressing Breast Cancer
+1
RECRUITING

NCT05894239

A Study to Evaluate the Efficacy and Safety of Inavolisib in Combination With Phesgo Versus Placebo in Combination With Phesgo in Participants With PIK3CA-Mutated HER2-Positive Locally Advanced or Metastatic Breast Cancer

This study will evaluate the efficacy and safety of inavolisib in combination with Phesgo (pertuzumab, trastuzumab, and rHuPH20 injection for subcutaneous use) compared with placebo in combination with Phesgo, as maintenance therapy, after induction therapy in participants with previously untreated HER2-positive advanced breast cancer (ABC).

Gender: All

Ages: 18 Years - Any

Updated: 2026-06-29

47 states

Metastatic Breast Cancer
COMPLETED

NCT03323346

Phase II Trial of Disulfiram With Copper in Metastatic Breast Cancer

The aim of the study is to establish clinical evidence for introducing disulfiram and cooper as an active therapy for metastatic breast cancer upon failure of conventional systemic and/or locoregional therapies. Analyses of the following objectives will be performed in the population of patients with metastatic breast cancer: Primary efficacy objective: To evaluate the efficacy of the treatment by assessment of: * clinical response rate (RR) * clinical benefit rate (CBR) Secondary efficacy objectives: To evaluate the efficacy of the treatment by assessment of: * time to progression (TTP) * overall survival (OS) Pharmacokinetic objectives: • to determine pharmacokinetic parameters for disulfiram and its active metabolites administered in combination with copper supplements in cancer patient population Safety objectives: • to describe safety profile of disulfiram administered in combination with copper supplements Exploratory objectives: Parallel analysis to assess (identify) potential candidate surrogate biomarkers of disulfiram efficacy, as well as identification (using proteomic, biochemical and molecular genetic studies) of potential predictive biomarkers of disulfiram sensitivity or resistance will be performed. Surrogate biomarker analysis will focus on in vivo ubiquitin-proteosomal system inhibition, cell cycle and DNA damage.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-06-26

Breast Neoplasm Female
Metastatic Breast Cancer