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Knowing the stage and grade of a person's cancer helps doctors know what treatment to use. It also helps predict how long the person will survive or whether there is a good chance for a cure.
Staging is a process that doctors use to describe how far cancer has spread.
Grading is a process that helps predict how fast the cancer will grow and spread.
In general, the stages of most cancers break down this way:
Although there are several methods of staging, most doctors now use the TNM method. The TNM method is based on the size of the tumor (T), the spread of the cancer into nearby lymph nodes (N), and the spread of the cancer to other body parts (M, for metastasis).
|T (tumor)||N (lymph nodes)||M (metastasis)|
Most cancers can be described using the TNM system. But certain cancers—for example, cancers of the blood, bone marrow, or brain—use other staging systems.
A tumor's grade, from 1 to 4, describes how its cells look under a microscope. The more these cells look like normal cells, the lower the grade and the lower the likelihood that the cancer will spread quickly.
Tumor cells that look like normal cells are called grade 1 tumors. They usually grow slowly.
A grade 4 tumor, on the other hand, has cells that look very different from normal cells. Grade 4 tumors often grow quickly and spread rapidly.
For certain types of cancer, doctors use other grading methods. For example, in prostate cancer, the doctor gives the cancer a Gleason score. Prostate cancer cells that have a low Gleason score grow more slowly than cells that have a higher score.
Breast cancer and kidney cancer also use other grading methods.
|American Cancer Society (ACS)|
The American Cancer Society (ACS) conducts educational programs and offers many services to people with cancer and to their families. Staff at the toll-free number have information about services and activities in local areas and can provide referrals to local ACS divisions.
Cancer.Net is the information website of the American Society of Clinical Oncology (ASCO) for people living with cancer and for those who care for them. ASCO is the world's leading professional organization representing physicians of all oncology subspecialties. Cancer.Net provides current oncologist-approved information on living with cancer.
|National Cancer Institute (NCI)|
|6116 Executive Boulevard|
|Bethesda, MD 20892-8322|
|Web Address:||www.cancer.gov (or https://livehelp.cancer.gov/app/chat/chat_launch for live help online)|
The National Cancer Institute (NCI) is a U.S. government agency that provides up-to-date information about the prevention, detection, and treatment of cancer. NCI also offers supportive care to people who have cancer and to their families. NCI information is also available to doctors, nurses, and other health professionals. NCI provides the latest information about clinical trials. The Cancer Information Service, a service of NCI, has trained staff members available to answer questions and send free publications. Spanish-speaking staff members are also available.
Other Works Consulted
- American Cancer Society (2010). Understanding your diagnosis: Staging. Available online: http://www.cancer.org/Treatment/UnderstandingYourDiagnosis/staging.
- American Joint Committee on Cancer (2010). What Is Cancer Staging? Available online: http://www.cancerstaging.org/mission/whatis.html.
- National Cancer Institute (2004). Tumor grade. National Cancer Institute Fact Sheet. Available online: http://www.cancer.gov/cancertopics/factsheet/detection/tumor-grade.
- National Cancer Institute (2010). Cancer staging. National Cancer Institute Fact Sheet. Available online: http://www.cancer.gov/cancertopics/factsheet/detection/staging.
|Primary Medical Reviewer||E. Gregory Thompson, MD - Internal Medicine|
|Specialist Medical Reviewer||Joseph O'Donnell, MD - Hematology, Oncology|
|Last Revised||January 19, 2012|
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