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Skin Immunologic - Pathology (view source)

545 bytes removed , 16:32, 22 February 2011

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===[[Allergic Contact Dermatitis]]===

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*Usually involves [[Type IV Hypersensitivity|Type IV reaction]]

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*Pruritic lesions with self-inflicted trauma

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*At areas in contact with allergen

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*Grossly:

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**Erythema, papules, +/- vesicles, exudation -> crusts

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**If chronic, lichenification, hyperpigmentation, alopecia

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*Microscopically:

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**Spongiotic superficial perivascular dermatitis

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**Mononuclear cells

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**If chronic, epidermal hyperplasia

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**May involve [[Eosinophils|eosinophils]]

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~~[[Category:Type IV Hypersensitivity Diseases]]~~

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~~[[Category:Integumentary System - Hypersensitivity Reactions]]~~

===Atopy===

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===[[Flea Bite Hypersensitivity]]===

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==Autoimmune reactions==

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