Tumor grading is a system used to classify cancer cells based on their appearance and behavior. The grading scale typically ranges from G1 to G4: - G1: Well-differentiated (low grade) - G2: Moderately differentiated (intermediate grade) - G3: Poorly differentiated (high grade) - G4: Undifferentiated (high grade)
The grade of the tumor helps in predicting its growth rate and potential to spread, which are crucial for treatment planning and assessing prognosis.