PMC3173833_01
Mediolateral oblique view of mammogram demonstrates a small well-circumscribed oval mass just underneath a radiopaque skin marker in the medial right breast near the nipple. The mass contains multiple small punctuate calcifications.
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F1
Diagnostic mammography showed a well-circumscribed, oval-shaped mass of the medial right breast, with smooth borders, and multiple small punctuate calcifications [Figure 1].
A gray-scale ultrasound image of the lesion shows a well-defined isoechoic oval mass, parallel with the skin measuring 7 mm x 3.5 mm, containing the small hyperechoic foci of calcification observed on the mammogram.
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F2
Gray-scale ultrasound examination revealed a small superficial isoechoic well-marginated oval mass parallel to the skin, with smooth borders, and multiple hyperechoic foci corresponding to calcifications seen on mammogram [Figure 2].
Typical basaloid and shadow cells of pilomatrixoma (Hemotoxylin and eosin, 10x).
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F3
Pathologic examination was consistent with a pilomatrixoma [Figure 3].