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Home > Living Well > Health Library > Cancer Staging and Grading
The stage of a cancer describes how much cancer is in the body and where it is located. If the cancer has spread, the stage also includes how far it has spread.
The grade describes how tumor cells look under a microscope compared to cells from healthy tissue near the tumor. The tumor grade may help predict how quickly the cancer will grow and spread.
Knowing the stage and grade of a cancer helps doctors know what treatment to use. It also helps predict how long the person will survive and what chance there is of a cure.
There are several methods of cancer staging. Doctors may use this simple system to describe the overall stage of a cancer.
Doctors often need more details as they make decisions about treatment, so they may use the TNM method. The TNM method is based on:
Most cancers can be described using the TNM system. But other staging systems are used for certain cancers (for example, cancers in children).
A tumor's grade describes how its cells look under a microscope. Tumors are generally graded from 1 to 4. A lower number means more normal-looking cells and a lower likelihood that the cancer will spread quickly.
Doctors use other grading methods for some types of cancer. For example, prostate cancers are graded with a Gleason score.
Current as of:
September 8, 2021
Author: Healthwise StaffMedical Review: E. Gregory Thompson MD - Internal MedicineKathleen Romito MD - Family MedicineJoseph O'Donnell MD - Hematology, Oncology
Current as of: September 8, 2021
Author: Healthwise Staff
Medical Review:E. Gregory Thompson MD - Internal Medicine & Kathleen Romito MD - Family Medicine & Joseph O'Donnell MD - Hematology, Oncology
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