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Knowing the stage and grade of the cancer helps the doctors decide on the most appropriate treatment for you.
Grading describes the appearance of the cancer cells under a microscope. The grade gives an idea of how quickly the cancer may develop. The most common grading system for bone cancer uses two grades: low-grade and high-grade.
Low-grade means that the cancer cells look very similar to normal bone cells. They are usually slow-growing and are less likely to spread.
In high-grade tumours the cells look very abnormal. They’re likely to grow more quickly and are more likely to spread. All Ewing’s sarcomas| are high-grade.
The stage of a cancer describes its size and whether it has spread. The stages of bone cancer are also based on the grade of the cancer.
There are two different staging systems used for bone cancer. This is the Enneking staging system, which is commonly used to stage bone cancers:
The cancer is low-grade and hasn’t spread beyond the bone. Stage 1 is further divided into:
The cancer is high-grade and hasn’t spread beyond the bone. Stage 2 is further divided into:
The bone cancer may be any grade and has spread to other parts of the body, such as the lungs.
Content last reviewed: 1 August 2011
Next planned review: 2013
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