The Margie Petersen Breast Center at Providence Saint John’s Health Center provides comprehensive breast health and breast cancer care, bringing together timely evaluation, advanced breast imaging, multidisciplinary treatment, research and supportive services in one coordinated program.
Whether you have discovered a new breast change, received an abnormal imaging result, are concerned about breast cancer risk or have already been diagnosed with breast cancer, our specialists can help determine what the finding means and what should happen next.
Breast Care Starts With Answers
A breast concern does not automatically mean breast cancer. Many breast changes have benign causes, but a new or unexplained finding deserves appropriate evaluation. Our goal is to help you move from uncertainty to a clear understanding of the finding and the next step in care.
The Margie Petersen Breast Center includes a dedicated Breast Clinic designed to help patients with new or concerning breast findings receive evaluation quickly. By coordinating clinical examination, diagnostic imaging and biopsy when needed, our goal is to provide answers sooner rather than leaving patients waiting through multiple appointments.
I Found a Lump or Other Breast Change
A new breast lump, nipple change, breast pain, skin change or other symptom can have many possible causes. Evaluation begins with the history of the change and a clinical breast examination, followed by diagnostic imaging or biopsy when appropriate. Patients with a new breast concern may be evaluated even when breast cancer has not been diagnosed.
Learn more about breast health and common breast conditions.
My Mammogram or Imaging Was Abnormal

An abnormal mammogram, ultrasound or other breast imaging result does not necessarily mean cancer. Additional imaging or tissue sampling may be recommended to determine whether the finding is benign or requires treatment. Our breast specialists coordinate clinical examination, diagnostic imaging and biopsy when needed so patients can understand the finding and move efficiently toward the appropriate next step.
Learn more about breast evaluation.
I Am Concerned About My Breast Cancer Risk
Personal health history, family history, breast density, previous breast biopsies and inherited genetic changes can influence breast cancer risk. For some patients, understanding risk can affect screening recommendations, genetic counseling or other preventive strategies. The Breast Center can help determine which risk factors are relevant and whether additional evaluation, surveillance or genetic counseling should be considered.
Learn more about family history, genetic testing and inherited breast cancer risk.
I Have Been Diagnosed With Breast Cancer
A breast cancer diagnosis brings a different set of questions: What type of cancer is it? Has it spread? Will I need surgery, radiation or medication? What are my options for breast reconstruction, and how quickly do decisions need to be made? Our multidisciplinary team reviews the pathology, imaging, tumor biology and other clinical findings to develop an individualized treatment plan.












