Table 1.

Summary table for breast pilomatrixoma

Etiology	Unknown. Repeated traumas on skin may lead to an overgrowth of hair matrix.
Incidence	Very rare (1:100000 people)
Gender Ratio	More frequent on women
Age Predilection	1st and 2nd decades
Risk Factors	Unknown
Treatment	Surgical excision
Prognosis	Excellent
Findings on Imaging	Mammographic findings: nodular opacity with pleomorphic heterogeneous microcalcifications (ACR BI-RADS IV–V). Ultrasonographic findings: hypoechoic nodule with irregular margins, posterior acoustic shadowing and hyperechoic spots due to microcalcifications.