Definition: RAST is an abbreviation for Radio-Allergo-Sorbent-Test, a test for the presence of IgE against various allergens performed on blood taken from a patient. Results can be quantified for an estimate of how sensitive a patient is to a specific allergen, particularly certain foods.
RAST
By Daniel More, MD, About.com Guide
Updated December 11, 2006
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
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