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Table 2. Primary Tumor (T)a

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.
TXPrimary tumor cannot be assessed.
T0No evidence for primary tumor.
T1Tumor ≤2 cm.
T2Tumor >2 cm but not >5 cm.
T3Tumor >5 cm but not >10 cm.
T4Tumor >10 cm in greatest dimension.