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Case number:	170
Age:	74
Clinical presentation:	Postmenopausal woman with history of left breast cancer and who had undergone left MRM is on annual surveillance. She also has high family risk because of breast carcinoma in a maternal cousin. On examination, no abnormality was detected in the right breast.

Mammography:

Breast composition:	ACR category a (the breasts are almost entirely fatty)
Mammography features:
‣ Location of the lesion:	Right breast, all quadrants, all zones, typically benign rod-like calcifications in diffuse distribution radiating towards the nipple
‣ Mass:
• Number:	0
• Size:	No mass
• Shape:	None
• Margins:	None
• Density:	None
‣ Calcifications:
• Typically benign:	Large rod-like
• Suspicious:	None
• Distribution:	Diffuse
‣ Architectural distortion:	None
‣ Asymmetry:	None
‣ Intramammary node:	None
‣ Skin lesion:	None
‣ Solitary dilated duct:	None
‣ Associated features:	None

BI-RADS:

BI-RADS Category: 2 (benign)

Case summary:

Postmenopausal woman who had undergone surgery for left breast cancer presented for annual surveillance. Diagnosed as typically benign plasma cell mastitis calcifications in right breast, BI-RADS 2 on imaging.

Learning points:

Large rod-like calcifications are seen as continuous rods branching in ductal distribution, radiating towards the nipple. They are benign calcifications, formed within ectatic ducts. The calcified streaks are thick, usually > 1 mm in diameter and with sharp margins. They are most often seen in women older than 60 years.