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urticaria hemorrhagica |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.04 sec. |
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urticaria hemorrhagica. urticaria a vascular reaction of the skin that is commonly immunologically based or may be due to direct exposure to a chemical. Marked by transient appearance of slightly elevated patches (wheals) which are redder or paler than the surrounding skin and often attended by severe itching; called also hives. The wheals may be in very large numbers, mostly over the body, 0.5 to 2 inches in diameter and there is no discontinuity of the epithelium. Called also nettle rash. giant urticaria, urticaria gigantea angioneurotic edema. heat reflex urticaria see cholinergic pruritus. urticaria hemorrhagica purpura with urticaria. urticaria medicamentosa that due to use of a drug. nasolacrimal urticaria conjunctivitis and rhinitis caused by hypersensitivity to inhaled allergens (atopy). papular urticaria, urticaria papulosa an allergic reaction to the bite of various insects, with appearance of lesions that evolve into inflammatory, increasingly hard, red or brownish, persistent papules. See also lichen. urticaria pigmentosa a proliferative disorder of mast cells in humans; a similar disease has been reported in young cats. There is erythema and hyperpigmentation of the mouth, chin, neck and eyes. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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