Cancers regardless of where it occurs usually start in one section of the body. If this is not treated, the cells will spread to nearby tissues and this is exactly what happens when you have stage 2 colon cancer.
Stage 2 colon cancer is also known as Duke B colon cancer. There are two types namely 2A and 2B. You are diagnosed to have 2A colon cancer if it has spread beyond the middle tissue layers of the colon wall or has infected around the rectum. You will have 2B if it has gone beyond the peritoneum.