Tumor grading and staging are important for understanding cancer, but they look at different things:

Tumor Grading:

• This shows how unusual the tumor cells look when viewed under a microscope.
• Higher grades, like Grade 3, mean the tumor is more aggressive and could grow faster.
• For example, a Grade 1 tumor looks a lot like normal tissue, while a Grade 3 tumor looks very different and more abnormal.

Tumor Staging:

• This checks how far the cancer has spread in the body.
• It uses something called the TNM classification:
  • T stands for Tumor size.
  • N means Lymph Node involvement (how many nearby nodes are affected).
  • M refers to Metastasis (if the cancer has spread to other parts of the body).
• For example, Stage I means the cancer is still in one place, while Stage IV means it has spread a lot.

Knowing the difference between grading and staging helps doctors decide the best way to treat cancer.