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urticaria pigmentosa in Medicine

urticaria pigmentosa

(pĭg′mən-tōsə)
n.
  1. Mastocytosis resulting from congenital excess of mast cells in the superficial dermis and characterized by brownish papules that urticate when stroked.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.