NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,091 terms related to cancer and medicine.

fluorine F 18-EF5
(FLOOR-een ...)
A radioactive substance 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. Fluorine F 18-EF5 is a type of radiopharmaceutical. Also called 18F-EF5.