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A solitary, hard, annular, centrally depressed papule, occurring usually in women on the face, consisting of dermal strands of basaloid cells and small keratinous cysts within desmoplastic stroma.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.