NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,804 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.

Standard Operating Procedure
(STAN-durd AH-puh-RAY-ting proh-SEE-jer)
Written instructions for doing a specific task in a certain way. In clinical trials, Standard Operating Procedures are set up to store records, collect data, screen and enroll subjects, and submit Institutional Review Board (IRB) applications and renewals. Also called SOP.