Diseases [C] » Neoplasms [C04] » Neoplasms by Histologic Type » Neoplasms, Glandular and Epithelial » Neoplasms, Basal Cell » Pilomatrixoma
Description
A tumor composed of cells resembling those of the hair matrix, which undergo 'mummification' and may calcify. It is a relatively uncommon tumor, which may occur at any age from infancy. The majority of patients are under 20, and females are affected more than males. The lesion is usually a solitary deep dermal or subcutaneous tumor 3-30 mm in diameter, situated in the head, neck, or upper extremity. (From Rook et al., Textbook of Dermatology, 4th ed, p2401) MeSH
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