What Colon Cancer Stages. After colon cancer is diagnosed, the next step is finding out what stage it is, or how advanced it is. There are five stages of colon cancer, starting at zero and going up to four.
It is performed for diagnostic and research purposes, and to determine the best method of treatment. Rectal cancer originates in the rectum. Colorectal cancer has four distinct stages.
The stages and substages below Stage I colon cancer involves more than just the inner lining of the colon.
Cancer of the colon and/or rectum is referred to as colorectal cancer, the fourth most common cancer in the United States.
Rectal cancer is staged much the same way as colon cancer, but because the tumor is much lower down in the colon, the treatment options may vary. Staging may not be complete until all of these tests are finished. The early stages of colon cancer usually don't have any signs or symptoms.
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