- Stage 0: In this stage, the cancer hasn’t grown beyond the inner layer of the colon or rectum.
- Stage I: The cancer has spread through the colon’s inner lining, but hasn’t spread beyond the colon wall or rectum.
- Stage II: The cancer has grown through the colon or rectal wall, but hasn’t spread to nearby lymph nodes.
- Stage III: The cancer has invaded nearby lymph nodes but isn’t affecting other parts of the body.
- Stage IV: The cancer has metastasized throughout the body to sites such as the liver, lung, ovaries or the lining of the abdominal cavity.
Stages of Colon Cancer
The staging of colorectal cancer helps doctors determine a course of treatment. Staging is done on a scale from 0 to 4, with the higher stages indicating a cancer than has spread more throughout the body.
Colon cancer that comes back following treatment is called recurrent colon cancer.