Table 3. Distant Metastasis (M)a

M0No distant metastasis.
M1Distant metastasis.

aReprinted with permission from AJCC: Anus. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 165-73.

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