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Case number:	155
Age:	52
Clinical presentation:	Postmenopausal woPostmenopausal woman with average risk of developing breast cancer attended for mammography screening. On examination no abnormality was detected. man at average risk of developing breast cancer came for mammography screening. On examination no abnormality detected.

Mammography:

Breast composition:	ACR category a (the breasts are almost entirely fatty)
Mammography features:
‣ Location of the lesion:	Right breast, upper outer quadrant at 11 o’clock, posterior third
‣ Mass:
• Number:	1
• Size:	1.0 cm in greatest dimension
• Shape:	Oval
• Margins:	Circumscribed
• Density:	Equal
‣ Calcifications:
• Typically benign:	None
• Suspicious:	None
• Distribution:	None
‣ Architectural distortion:	None
‣ Asymmetry:	None
‣ Intramammary node:	Present
‣ Skin lesion:	None
‣ Solitary dilated duct:	None
‣ Associated features:	None

Ultrasound:

Ultrasound features: Right breast, upper outer quadrant at 10 o’clock
‣ Mass
• Location:	Right breast, upper outer quadrant at 10 o’clock
• Number:	1
• Size:	1.1 cm in greatest dimension
• Shape:	Oval
• Orientation:	Not parallel
• Margins:	Circumscribed
• Echo pattern:	Hypoechoic with central sinus
• Posterior features:	No posterior features
‣ Calcifications:	None
‣ Associated features:	Hilar vascularity
‣ Special cases:	Lymph nodes, intramammary

BI-RADS:

BI-RADS Category: 1 (negative)

Case summary:

Postmenopausal woman with average risk of developing breast cancer came for mammography screening. Diagnosed as intramammary node in right breast. BI-RADS 2 on imaging.

Learning points:

An intramammary node has circumscribed margins and is sharply defined with central lucent hilum. The appearance is characteristic and does not require further investigation. The identification of an intramammary node and marking out its presence is necessary to rule out a new developing asymmetry on mammography and to avoid unnecessary biopsies.