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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



grading  listen  (GRAY-ding)

  A system for classifying cancer cells in terms of how abnormal they appear when examined under a microscope. The objective of a grading system is to provide information about the probable growth rate of the tumor and its tendency to spread. The systems used to grade tumors vary with each type of cancer. Grading plays a role in treatment decisions.

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