The stage of colorectal cancer indicates to what extent the cancer has invaded the intestinal wall, and whether or not it has infiltrated other organs or the lymph nodes (small organs that produce immune system cells that circulate throughout the body).
- Stage 0: The cancer is confined to the innermost lining of the colon or rectum.
- Stage I: The cancer has spread to the second and third layers of the colon or rectum but hasn’t spread to the outer wall of the colon, nor has it spread to the lymph nodes or to other parts of the body.
- Stage II: The cancer is larger than previous stages and has spread to the outer, muscular wall of the colon or rectum. It has not spread to lymph nodes.
- Stage III: Cancer has spread to at least one lymph node.
- Stage IV: Colorectal cancer has invaded other organs beyond the colon or rectum, such as the lungs or the liver. It may or may not have invaded a lymph node.
Learn more about colorectal cancer:
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