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.

surgical castration
(SER-jih-kul kas-TRAY-shun)
Surgical removal of the testicles (orchiectomy) or ovaries (oophorectomy) to stop the production of sex hormones. Decreasing the levels of hormones may stop the growth of certain cancers.