Calcifying epithelioma of Malherbe
Pilomatrixoma is a benign tumor with cells resembling cells of the hair matrix and areas of intratumor calcification.
Most common on the head, these pink to red, deep dermal tumors can grow slowly, or very rapidly.
They are characterized by a lobular appearance and can be hard when palpated if there is extensive calcification within.
There may be an associated inflammation.
Malignant transformation can occur, but is uncommon.
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