Hi Karen,
Tumor grade is not the same as cancer stage. Tumors are graded as 1-4 and can begin as any grade. Cancer begins as stage 1 and can spread – it is generally named for the stage at initial diagnosis.
-This link explains a little more about tumor grading: https://www.cancer.gov/about-cancer/diagnosis-staging/diagnosis/tumor-grade
-And cancer staging: https://www.cancer.gov/about-cancer/diagnosis-staging/staging
Chrissy