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After colon cancer has been diagnosed, tests are done to find out if cancer cells have spread within the colon or to other parts of the body.
http://www.meb.uni-bonn.de/cancer.gov/CDR0000062954.html#REF_112
Staging is a method of evaluating the progress of the cancer in a patient.
http://www.oncologychannel.com/coloncancer/staging.shtml
Stage can be described in different ways.
http://www.cancerhelp.org.uk/help/default.asp?page=3944