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What is tumor “grade”?

April 26, 2017grade tumor

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What is tumor “grade”?

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In contrast to carcinomas, sarcomas are graded “low”, “intermediate” or “high-grade” by the pathologist. This corresponds to the probability of the tumor spreading to other parts of the body. Typically, only patients with high-grade tumors receive chemotherapy.

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The grade of a tumor is based on histology. This means the appearance, under a microscope, of the cells that comprise the tumor. A pathologist studies cells to determine whether they’re benign or malignant. Malignant cells are categorized into grades, depending on how aggressive a tumor is.