NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,893 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.

metastasize
(meh-TAS-tuh-size)
To spread from one part of the body to another. When cancer cells metastasize and form secondary tumors, the cells in the metastatic tumor are like those in the original (primary) tumor.