Plasma cell mastitis

Dr Henry Knipe and Radswiki et al.

Plasma cell mastitis is a benign breast condition which represents calcification of inspissated secretions in or immediately adjacent to ectatic benign ducts. 


It is typically seen in older women (e.g. > 60 years of age).


It is thought to represent aseptic inflammation of the breast from extravasation of intraductal secretions into periductal connective tissue. 

Radiographic features


Plasma cell mastitis has a characteristic appearance. Calcifications are thick, linear, rod-like or cigar-shaped. Calcifications can be up to 10 mm long. They tend to be bilateral, often symmetrical in distribution and oriented with long axes pointing toward the nipple1. Branching may sometimes be seen. 

Compared to microcalcifications of DCIS or ductal carcinoma, calcifications of plasma cell mastitis are larger in both length and caliber and have a smoother outline. 

Treatment and prognosis

It is a benign entity and there no increased risk of malignancy 3.

Related articles

Breast imaging and pathology

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