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Tumor Grade

Glossary

tumor grade

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 and histologic grade.

Last updated: 2016-01-06

Source: The National Cancer Institute's Dictionary of Cancer Terms (http://www.cancer.gov/dictionary)