Unusual presentation of sarcoidosis of the breast.

We report a case of sarcoidosis with an unusual radiological appearance. The patient was a 41-year-old asymptomatic woman who presented for a baseline screening mammogram, which revealed an asymmetric, slightly increased density in the upper outer quadrant of her left breast. Ultrasonography failed to demonstrate any mass. Her past medical history was remarkable for sarcoidosis. Stereotactic core biopsy revealed sarcoidosis diffusely infiltrating the breast parenchyma.