NCCN Guidelines for Patients® | Colon Cancer - page 18

NCCN Guidelines for Patients
®
Colon Cancer, Version 1.2014
16
Review
• Polyps are often removed by an endoscopic
polypectomy.
• The removed polyp will be tested to assess
how far the cancer has grown into the colon
wall.
• Colon cancer is grouped into stages based on
the growth and spread of the tumor.
• Cancer is often staged before and after the
start of treatment.
• If you have stage 0 colon cancer, you will likely
not need any more tests or treatment.
2
Cancer staging
Review
Carcinoma in situ
Carcinoma in situ is stage 0 colon cancer. The cancer has not grown beyond the
first layer of the colon wall—the mucosa. There are no blood or lymph vessels in
the mucosa. As such, the cancer can’t spread to other tissues in your body. If you
have carcinoma in situ, you will likely not need any more tests. You will not need
treatment since all the cancer was removed during the endoscopic polypectomy.
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