Canadian Medical Guide > Diseases > Neoplasms > Neoplasms by Histologic Type > Neoplasms, Glandular and Epithelial > Neoplasms, Basal Cell > Pilomatrixoma Terms and Definitions

Pilomatrixoma

Medical Definition:	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)
Guide Notes:	benign or malignant; /blood supply /chem /second /secret /ultrastruct permitted; coord IM with SKIN NEOPLASMS (IM) + HAIR DISEASES (IM)
Previously Indexed:	Skin Neoplasms (1966-1993)

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