Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments that treat this condition Breast and Melanoma Surgical Oncology in Rochester Breast Cancer Surgery Program in Jacksonville Breast Clinic Cancer Care at Mayo Clinic Integrative Oncology Laboratory Medicine and Pathology Radiation Oncology Radiology Surgery Surgical Oncology and Endocrine Surgery in Arizona Women's Health Areas that research this condition Radiology Research Research Profiles Edit search filters close Narrow your search By location Arizona Florida Minnesota View all View all physicians • Florida ResearchMayo Clinic researchers are involved in many studies related to estrogen receptor (ER) positive breast cancer. Mayo Clinic doctors often inform eligible patients about opportunities to participate in research studies and clinical trials related to advancements in the treatment of breast cancer. Areas of research include: Studying new hormone treatments for ER positive breast cancer, including treatments for women who have not gone through menopause. Using medicines that deliver radiation directly to ER positive breast cancer cells that have spread to other parts of the body. Studying features of breast cancer cells that may help doctors choose treatments that are more likely to work. Testing new combinations of treatments for ER positive breast cancer that has spread and no longer responds to hormone treatment. Studying side effects of hormone treatment for breast cancer, including hair loss. See a list of publications about estrogen receptor (ER) positive breast cancer by Mayo Clinic doctors on PubMed, a service of the National Library of Medicine. By Mayo Clinic Staff Request an appointment Survival rates Aug. 26, 2026 Print Related Associated Procedures Biological therapy for cancer Breast biopsy Breast MRI Breast reconstruction Chemotherapy for breast cancer Estrogen blocker therapy for breast cancer Lumpectomy Mammogram Mastectomy Radiation therapy for breast cancer Sentinel node biopsy Ultrasound Show more associated procedures Estrogen receptor (ER) positive breast cancerSymptoms&causesDiagnosis&treatmentStagesSurvivalratesDoctors&departments Research: It's all about patients Show transcript for video Research: It's all about patients [MUSIC PLAYING] Joseph Sirven, M.D., Professor of Neurology, Mayo Clinic: Mayo's mission is about the patient. The patient comes first. So the mission and research here is to advance how we can best help the patient, how to make sure the patient comes first in care. So in many ways, it's a cycle. It can start with as simple as an idea worked on in a laboratory, brought to the patient bedside, and if everything goes right — and let's say it's helpful or beneficial — then brought on as a standard approach. And I think that is one of the unique characteristics of Mayo's approach to research — that patient-centeredness — that really helps to put it in its own spotlight. CON-20605520 Diseases & Conditions ER positive breast cancer