NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,919 terms related to cancer and medicine.

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contraindication
(KON-truh-IN-dih-KAY-shun)
A symptom or medical condition that makes a particular treatment or procedure inadvisable because a person is likely to have a bad reaction. For example, having a bleeding disorder is a contraindication for taking aspirin because treatment with aspirin may cause excess bleeding.