The most common staging system for colorectal cancer is the TNM system. For colorectal cancer there are 5 stages – stage 0 followed by stages 1 to 4. Often the stages 1 to 4 are written as the Roman numerals I, II, III and IV. Generally, the higher the stage number, the more the cancer has spread.
The most common staging system for colorectal cancer is the TNM system. For colorectal cancer there are 5 stages – stage 0 followed by stages 1 to 4. Often the stages 1 to 4 are written as the Roman numerals I, II, III and IV.
Stage 1: Stage 1 colon cancer indicates the cancer has grown into the inner layer of the colon, called the mucosa, to the next layer of the colon, called the submucosa. It has not spread to the lymph nodes.