Lip and Oral Cavity Cancer Treatment (Patient) (cont.)
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Stages of Lip and Oral Cavity Cancer
After lip and oral cavity cancer has been diagnosed, tests are done to find out if cancer cells have spread within the lip and oral cavity or to other parts of the body.
The process used to find out if cancer has spread within the lip and oral cavity or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. The results of the tests used to diagnose lip and oral cavity cancer are also used to stage the disease. (See the General Information section.)
There are three ways that cancer spreads in the body.
The three ways that cancer spreads in the body are:
When cancer cells break away from the primary (original) tumor and travel through the lymph or blood to other places in the body, another (secondary) tumor may form. This process is called metastasis. The secondary (metastatic) tumor is the same type of cancer as the primary tumor. For example, if breast cancer spreads to the bones, the cancer cells in the bones are actually breast cancer cells. The disease is metastatic breast cancer, not bone cancer.
The following stages are used for lip and oral cavity cancer:
Stage 0 (Carcinoma in Situ)
In stage 0, abnormal cells are found in the lining of the lips and oral cavity. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.
In stage I, cancer has formed and the tumor is 2 centimeters or smaller. Cancer has not spread to the lymph nodes.
In stage II, the tumor is larger than 2 centimeters but not larger than 4 centimeters, and cancer has not spread to the lymph nodes.
In stage III, the tumor:
Stage IV is divided into stages IVA, IVB, and IVC.
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