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Case number:	017
Age:	50
Clinical presentation:	Premenopausal woman presented with right nipple inversion, which she has had for many years. Patient had not breastfed her child from the right breast.

Mammography:

Breast composition:	ACR category b (there are scattered areas of fibroglandular density)
Mammography features:
‣ Location of the lesion:	Right breast, inverted nipple
‣ Mass:
• Number:	0
• Size:	No
• Shape:	None
• Margins:	None
• Density:	None
‣ Calcifications:
• Typically benign:	None
• Suspicious:	None
• Distribution:	None
‣ Architectural distortion:	None
‣ Asymmetry:	None
‣ Intramammary node:	None
‣ Skin lesion:	None
‣ Solitary dilated duct:	None
‣ Associated features:	Inverted nipple

Ultrasound:

Ultrasound features: Right breast, inverted nipple
‣ Mass
• Location:	Right breast, inverted nipple
• Number:	0
• Size:	None
• Shape:	None
• Orientation:	None
• Margins:	None
• Echo pattern:	None
• Posterior features:	No posterior features
‣ Calcifications:	None
‣ Associated features:	None
‣ Special cases:	None

BI-RADS:

BI-RADS Category: 1 (negative)

Case summary:

Premenopausal woman presented with long-standing right nipple inversion. Diagnosed as BI-RADS 1 on imaging.

Learning points:

A slit-like horizontally placed inverted nipple is usually a physiological or anatomical variation. Confirmation of the absence of underlying diseases on mammography allays anxiety.