Stages of Colon Cancer


There are different ways of staging cancer. The stages depend on how far the cancer has spread.
Here is a brief summary of a commonly used four-stage account of where the cancer is at the beginning of each stage.

Stage 0:

The cancer is in a very early stage. It is known as carcinoma in situ. It has not grown further than the inner layer of the colon.

Stage 1:

The cancer has grown into the next layer of tissue, but it has not reached the lymph nodes or other organs.

Stage 2:

The cancer has reached the outer layers of the colon, but it has not spread beyond the colon.

Stage 3:

The cancer has grown through outer layers of the colon and it has reached one to three lymph nodes. It has not spread to distant sites.

Stage 4:

The cancer has reached other tissues beyond the wall of the colon. As stage 4 progresses, the cancer reaches distant parts of the body.


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