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Tundra Space

Clinical Research Directory

Browse clinical research sites, groups, and studies.

4 clinical studies listed.

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Progesterone Receptor Positive

Tundra lists 4 Progesterone 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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ACTIVE NOT RECRUITING

NCT02398773

FES PET/CT in Predicting Response in Patients With Newly Diagnosed Metastatic Breast Cancer Receiving Endocrine Therapy

This phase II trial studies F-18 16 alpha-fluoroestradiol (FES) positron emission tomography (PET)/computed tomography (CT) in predicting response to endocrine therapy in patients with newly diagnosed breast cancer that has spread to other parts of the body. FES is a radioactive form of the hormone estrogen and may "light up" where cancer is in the body. Diagnostic procedures using FES, such as FES PET/CT, may help measure the FES and help doctors predict how well the cancer will respond to treatment.

Gender: All

Ages: 18 Years - Any

Updated: 2026-04-09

14 states

HER2/Neu Negative
Progesterone Receptor Negative
Progesterone Receptor Positive
+1
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

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