NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,957 terms related to cancer and medicine.

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18F-EF5
A substance that is being studied in positron emission tomography (PET) imaging to detect tumor hypoxia (a low level of oxygen in the tumor).This may help predict how the tumor will respond to treatment. It belongs to the family of drugs called radiopharmaceuticals. Also called fluorine F 18 EF5.