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Atopic (Atopy)


Updated March 14, 2012

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Atopic is a term used to describe an allergic response within the body following exposure to external irritants. Atopic diseases include allergic rhinitis, asthma, and eczema. Atopy, or the atopic reaction, involves an IgE response, in which histamines are produced following exposure to the allergen.

An alternative definition of the word "atopic" is a genetic predisposition to suffer from allergies.

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