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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Choque anafiláctico

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.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.