NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,413 terms related to cancer and medicine.

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genetic testing
(jeh-NEH-tik TES-ting)
The process of analyzing cells or tissues to look for genetic changes that may be a sign of a disease or condition, such as cancer. These changes may be a sign that a person has an increased risk of developing a specific disease or condition. Genetic testing may also be done on tumor tissue to help diagnose cancer, plan treatment, or find out how well treatment is working.