NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,176 terms related to cancer and medicine.

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serum tumor marker test
(SEER-um TOO-mer MAR-ker ...)
A blood test that measures the amount of substances called tumor markers (or biomarkers). Tumor markers are released into the blood by tumor cells or by other cells in response to tumor cells. A high level of a tumor marker may be a sign of cancer.