NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,811 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.

SOP
Written instructions for doing a specific task in a certain way. In clinical trials, SOPs are set up to store records, collect data, screen and enroll subjects, and submit Institutional Review Board (IRB) applications and renewals. Also called Standard Operating Procedure.