NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 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.

secondary tumor
(SEH-kun-dayr-ee TOO-mer)
A term that is used to describe cancer that has spread to another part of the body from the place in which it started. Secondary tumors are the same type of cancer as the original (primary) tumor. Also called secondary cancer.