Fig. 12. Plasma cell mastitis.

A. Plasma cell mastitis in non-lactating 34-year-old female with pain and swelling in lower half of left breast and nipple discharge. Ultrasound images of left breast in transverse (image on left) and longitudinal views (image on right) reveal markedly dilated intramammary duct in retroareolar region with echogenic content and surrounding increased vascularity. Ultrasound-guided biopsy of this duct was conducted to rule out malignancy, which only yielded inflammatory cells. B. Plasma cell mastitis in asymptomatic 71-year-old female at screening mammogram. Mammogram of both breasts in mediolateral oblique view shows characteristic large rod-like branching calcifications in both breasts.