NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,188 terms related to cancer and medicine.

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A measure of how fast cancer cells are dividing and growing. To find the MR, the number of cells dividing in a certain amount of cancer tissue is counted. MR is used to help find the stage of melanoma (a type of skin cancer) and other types of cancer. Higher MRs are linked with lower survival rates. Also called mitotic rate.