Stage 0 colorectal cancer
Also known as carcinoma in situ or intramucosal carcinoma, this is the earliest stage of colorectal cancer. In stage 0, the cancer has not grown beyond the inner layer of the colon or rectum.
A stage 0 colorectal cancer diagnosis occurs in conjunction with the following TNM categories:
- Tis: The cancer has not grown beyond the lining of the colon or rectum.
- N0: The cancer has not spread to the lymph nodes.
- M0: There has been no spreading to organs or other areas.