Tumor grade is a way of classifying tumors based on certain features of their cells. It is directly linked to prognosis.
Using a microscope, a pathologist studies the tumor tissue removed during a biopsy to check:
Together, these two factors determine the tumor grade.
Tumor grades are usually classified as:
For any given tumor size and breast cancer stage, prognosis is poorer with a higher tumor grade.
Many other factors impact survival and for any given tumor grade, survival varies greatly depending on these factors.
Learn more about other factors that affect prognosis.
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