Pilomatricoma

Definition 1

A benign adnexal neoplasm arising from hair-bearing skin surfaces, usually the head and neck and upper extremities. It usually presents as a solitary, slow-growing nodular mass. Morphologically, it displays differentiation towards the matrix and inner sheath of the normal hair follicle and the hair cortex. Complete surgical excision is usually curative. Occasionally, it may recur. (NCI Thesaurus)

Definition 2

A benign adnexal neoplasm arising from hair-bearing skin surfaces. (NCI Thesaurus/CDISC)

Definition 3

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) (NLM, Medical Subject Headings)

YOU MAY ALSO LIKE

Pilomatrical Carcinoma

A very rare, locally aggressive, malignant neoplasm of the hair follicle. The majority of the cases arise de novo, however malignant transformation…

Pilocytic Astrocytoma

A WHO grade I, relatively circumscribed, slowly growing, often cystic astrocytoma occurring in children and young adults. Histologically it is characterized…

Pilocytic

Made up of cells that look like fibers when viewed under a microscope.

Pilocarpine Hydrochloride

The hydrochloride salt of a natural alkaloid extracted from plants of the genus Pilocarpus with cholinergic agonist activity. As a cholinergic parasympathomimetic…

Pilocarpine

A drug used to increase salivation in people who have dry mouth caused by opioids or radiation therapy. Pilocarpine belongs to the…

Pillow

A cushion or support for the head or other body part; usually consisting of a cloth case surrounding a filler of feathers,…