NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,926 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

(… FLOOR-oh-MEH-thul-KOH-leen)
A radioactive substance being studied in PET imaging to detect certain types of cancer. 18F-fluoromethylcholine gets taken up by cells in the body and more of it is taken up by tumor cells than by normal cells. A PET scanner is used to detect which cells in the body have taken up 18F-fluoromethylcholine. It is a type of radioimaging agent. Also called 18F-choline, 18F-FMCH, and fluorine F 18 fluoromethylcholine.