Anaphylaxis overview
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Anaphylaxis Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Anaphylaxis overview On the Web |
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American Roentgen Ray Society Images of Anaphylaxis overview |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1], Associate Editor(s)-in-Chief: Dushka Riaz, MD
Overview
Anaphylaxis is an acute systemic (multi-system) and severe Type I Hypersensitivity allergic reaction in humans and other mammals. Anaphylaxis occurs when a person or animal is exposed to a trigger substance, called an allergen, to which they have already become sensitized. Minute amounts of allergens may cause a life-threatening anaphylactic reaction. Anaphylaxis may occur after ingestion, skin contact, injection of an allergen or, in rare cases, inhalation.
Historical Perspective
The term comes from the Greek words ana (against) and phylaxis (protection).
There is no established system for the classification of [disease name].
OR
[Disease name] may be classified according to [classification method] into [number] subtypes/groups: [group1], [group2], [group3], and [group4].
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[Disease name] may be classified into [large number > 6] subtypes based on [classification method 1], [classification method 2], and [classification method 3]. [Disease name] may be classified into several subtypes based on [classification method 1], [classification method 2], and [classification method 3].
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Based on the duration of symptoms, [disease name] may be classified as either acute or chronic.
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If the staging system involves specific and characteristic findings and features: According to the [staging system + reference], there are [number] stages of [malignancy name] based on the [finding1], [finding2], and [finding3]. Each stage is assigned a [letter/number1] and a [letter/number2] that designate the [feature1] and [feature2].
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The staging of [malignancy name] is based on the [staging system].
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There is no established system for the staging of [malignancy name].