tumor grade

In cancer, a description of a tumor based on how abnormal the cancer cells and tissue look under a microscope and how quickly the cancer cells are likely to grow and spread.  Low-grade cancer cells look more like normal cells and tend to grow and spread more slowly than high-grade cancer cells.  Grading systems are different for each type of cancer.  They are used to help plan treatment and determine prognosis.  Also called grade or histologic grade.

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