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a solitary benign calcifying tumor of hair follicle origin manifested as a sharply circumscribed, firm, intracutaneous nodule, usually on the face, neck, or upper limb and presenting before age 20. Histological features include a fibrous stroma surrounding nests of basophilic cells and ghost, or shadow, cells.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.