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Table 5. Anatomic Stage/Prognostic Groupsa

Gastric GIST b
Group T N M Mitotic Rate
Stage IAT1 or T2N0M0Low
Stage IBT3N0M0Low
Stage IIT1N0M0High
Stage IIIAT3N0M0High
Stage IIIBT4N0M0High
Stage IVAny TN1M0Any rate
Any TAny NM1Any rate
Small Intestinal GIST c
Group T N M Mitotic rate
Stage IT1 or T2N0M0Low
Stage IIT3N0M0Low
Stage IIIAT1N0M0High
Stage IIIBT2N0M0High
Stage IVAny TN1M0Any rate
Any TAny NM1Any rate

gist = gastrointestinal stromal tumors.
aReprinted with permission from AJCC: Gastrointestinal stromal tumor. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 181-9.
bAlso to be used for omentum.
cAlso to be used for esophagus, colorectal, mesentery, and peritoneum.