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Table 3. Distant Metastasis (M)a

aReprinted with permission from AJCC: Malignant melanoma of the uvea. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 547-59.
M0No distant metastasis.
M1Distant metastasis.
M1aLargest diameter of the largest metastasis ≤3 cm.
M1bLargest diameter of the largest metastasis 3.1–8.0 cm.
M1cLargest diameter of the largest metastasis ≥8 cm.