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Definition:

Stage IV rectal cancer (...KOH-loh-REK-tul KAN-ser)

Stage IV colorectal cancer is divided into stage IVA and stage IVB. In stage IVA, cancer may have spread through the colon and/or rectal wall and may have spread to nearby organs or lymph nodes. Cancer has spread to one organ that is not near the colon and/or rectum, such as the liver, lung, or ovary, or to a distant lymph node. In stage IVB, cancer may have spread through the colon and/or rectal wall and may have spread to nearby organs or lymph nodes. Cancer has spread to more than one organ that is not near the colon and/or rectum or into the lining of the abdominal wall.

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