Breast Pathology

Breast cancer is the most common type of cancer affecting women worldwide. In the United States alone, over 200,000 new cases of breast cancer are diagnosed each year. Effective treatment can save many lives.

Developing a personalized treatment plan is a team effort, with many different specialists working together to provide the best possible care for each patient. The pathologist’s role is to determine the correct diagnosis by examining biopsy slides provided by either a referring physician or the patient. This diagnosis is then shared with oncologists and surgeons, who will work with patients to devise an appropriate treatment plan. But it all hinges on an accurate initial diagnosis. That’s why we’re here.

Drs. Argani and Nguyen

Contact Us

Getting a second opinion on your pathology diagnosis can clarify or even change a diagnosis. This can affect prognosis as well as therapy, and adds important data that contributes to a larger cause: making sure every diagnosis of breast cancer, everywhere, is as accurate as possible.

Invasive Lobular Carcinoma Photomicrograph

Your Results

Your Pathologist will use slides to help determine the following about a tumor:

Drs. Argani, Cimino-Mathews, & Richardson

How We Can Help

The Breast Pathology Service of Johns Hopkins Hospital provides expert second opinions within 24 hours of sample receipt. We also provide resources for current clinical trials that are testing new treatment methods against current standards of care.

Johns Hopkins Breast Pathology Team

Our Expertise

Diagnosing and treating breast cancer is truly a multidisciplinary team effort. The Breast Pathology Service is one integral part of the comprehensive, patient-centered team approach to breast disease at Johns Hopkins.

1 in 8

women in the US will be diagnosed with breast cancer in their lifetime.


of breast cancers are thought to be caused by genetic mutations in BRCA1 and BRCA2


of breast cancers in the US occur in women 40 or older