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Clinical Research Directory

Browse clinical research sites, groups, and studies.

5 clinical studies listed.

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Estrogen Receptor Positive

Tundra lists 5 Estrogen Receptor Positive clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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RECRUITING

NCT03723928

S1703 Serum Tumor Marker Directed Disease Monitoring in Patients With Hormone Receptor Positive Her2 Negative Metastatic Breast Cancer

This randomized research trial studies how well serum tumor marker directed disease monitoring works in monitoring patients with hormone receptor positive Her2 negative breast cancer that has spread to other places in the body. Using markers to prompt when scans should be ordered may be as good as the usual approach to monitoring disease.

Gender: All

Ages: 18 Years - Any

Updated: 2026-04-02

45 states

Anatomic Stage IV Breast Cancer AJCC v8
Estrogen Receptor Positive
HER2/Neu Negative
+3
ACTIVE NOT RECRUITING

NCT03359954

Radiation Therapy Before Surgery in Treating Patients With Hormone Receptor Positive, HER2 Negative Breast Cancer

This phase II trial studies how well radiation therapy before surgery works in treating patients with hormone receptor positive, HER2 negative breast cancer. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Giving radiation therapy before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-05

1 state

Estrogen Receptor Positive
HER2/Neu Negative
Invasive Breast Carcinoma
+1
ACTIVE NOT RECRUITING

NCT04692103

Serial FES PET/CT to Measure Hormone Expression in Patients Undergoing Endocrine Targeted Therapy

This clinical trial studies use of F-18 16 alpha-fluoroestradiol (\[F-18\] FES) positron emission tomography (PET)/computed tomography (CT) in measuring tumor hormone receptor expression in patients undergoing endocrine-targeted therapy for newly diagnosed breast cancer or breast cancer that has come back or spread to other places in the body. Comparing results of diagnostic procedures done before, during, and after hormone therapy may help measure a patient's response to treatment.

Gender: All

Ages: 18 Years - Any

Updated: 2026-01-22

1 state

Estrogen Receptor Positive
Primary or Recurrent Breast Carcinoma
Stage IV Breast Cancer AJCC v6 and v7
ACTIVE NOT RECRUITING

NCT01750073

Paclitaxel & Cyclophosphamide With or Without Trastuzumab Before Surgery in Treating Previously Untreated Breast Cancer

This phase II trial studies the side effects and how well giving paclitaxel and cyclophosphamide with or without trastuzumab before surgery works in treating patients with previously untreated breast cancer. Drugs used in chemotherapy, such as paclitaxel and cyclophosphamide, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Monoclonal antibodies, such as trastuzumab, may block tumor growth in different ways by targeting certain cells. Giving combination chemotherapy with or without trastuzumab before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed.

Gender: FEMALE

Ages: 19 Years - Any

Updated: 2025-11-18

1 state

Estrogen Receptor Negative
Estrogen Receptor Positive
HER2/Neu Negative
+13
RECRUITING

NCT03213041

Pembrolizumab and Carboplatin in Treating Patients With Circulating Tumor Cells Positive Metastatic Breast Cancer

The purpose of the study is to evaluate the impact on progression-free survival (PFS) with the combination carboplatin - pembrolizumab in patients with CTC (circulating tumor cells) positive, HER2 negative metastatic breast cancer previously treated with anthracyclines and taxanes. Previous studies have indicated that recurrent breast cancers are more resistant to chemotherapy and maybe associated with a weak immune system. This study is investigating the use of an immune therapy drug, pembrolizumab, that has the ability to restore the capacity of controlling and killing cancer cells of an important component of your immune system called T-cells. Pembrolizumab has been found effective in other types of cancer and has already been approved by FDA for those indications, but the efficacy in breast cancer is still unknown. In this study, pembrolizumab will be combined with chemotherapy to increase the cancer cell killing. There is no control or placebo treatment in this study.

Gender: All

Ages: 18 Years - Any

Updated: 2021-05-03

1 state

Estrogen Receptor Negative
Estrogen Receptor Positive
HER2/Neu Negative
+4