Table 3. Distant Metastasis (M)a
| aReprinted with permission from AJCC: Colon and rectum. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 143-164. | |
| M0 | No distant metastasis. |
| M1 | Distant metastasis. |
| M1a | Metastasis confined to 1organ or site (e.g., liver, lung, ovary, nonregional node). |
| M1b | Metastases in >1 organ/site or the peritoneum. |
