Pilomatrixoma, also known as calcifying epithelioma of Malherbe, is a benign tumor of hair cell origin. It is an unusual, but not particularly rare, tumor. Fifty percent or more of pilomatrixomas occur in the head and neck, and 40% occur in patients under 10 years of age. Pilomatrixomas may be mistaken for cysts, calcified lymph nodes, calcified hematomas or hemangiomas, or parotid gland tumors...
