Medical Dictionary

urticaria pigmentosa

noun urticaria pig·men·to·sa \ -ˌpig-mən-ˈtō-sə, -(ˌ)men-, -zə \

medical Definition of urticaria pigmentosa

:a skin disorder usually occurring in children that is caused by the proliferation of mast cells and is marked by small, itchy, reddish-brown spots or bumps on the skin
  • Urticaria pigmentosa is associated with indolent systemic mastocytosis in more than 80% of all cases; scratching of these reddish brown macules, which are scattered over the body except for the palms, soles, and scalp, triggers urtication and erythema …
  • —Mandakolathur R. Murali et al.The New England Journal of Medicine24 Mar. 2011

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