NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,123 terms related to cancer and medicine.

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anaphylactic shock
(A-nuh-fih-LAK-tik shok)
A severe and sometimes life-threatening immune system reaction to an antigen that a person has been previously exposed to. The reaction may include itchy skin, edema, collapsed blood vessels, fainting, difficulty in breathing, and death.