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Urticaria, Angioedema and Anaphylaxis


Urticaria, angioedema, and anaphylaxis are manifestations of the immediate hypersensitivity reaction. Immediate hypersensitivity is an antibody mediated reaction that occurs within minutes to hours of exposure to a particular antigen by an immune individual. Twenty percent of the population will have one of these manifestations, especially urticaria, at some time during life.

I. Pathophysiology

II. Anaphylaxis

III. Urticaria

IV. Angioedema