NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,186 terms related to cancer and medicine.

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tumor microenvironment
(TOO-mer MY-kroh-en-VY-run-MENT)
The normal cells, molecules, and blood vessels that surround and feed a tumor cell. A tumor can change its microenvironment, and the microenvironment can affect how a tumor grows and spreads.