Mammary Gland Biopsy of 38-Year-Old Patient

September 2, 2011
Robert D. Cardiff, MD, PhD

A 38-year-old female (para 3, gravida 3), complains of persistent bilateral mammary gland pain associated with a "lumpy" feeling when she does a self-examination. She carries a family history of breast cancer in both her mother and older sister. A biopsy revealed the following image. Click here to see the whole slide image.

The most likely diagnosis is:

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