Prognostic FactorsFact Sheet
Tumor grade is a way of classifying tumors based on certain features of their cells. The grade of a tumor 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. These 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 also impact survival and for any given tumor grade, survival varies greatly depending on these factors.
Learn more about other factors that affect prognosis.