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Table 2. Definitions of TNM Stages IA and IBa

Stage TNM Description  Illustration 
aReprinted with permission from AJCC: Exocrine and endocrine pancreas. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 241-9.
IAT1, N0, M0T1 = Tumor limited to the pancreas, ≤2 cm in greatest dimension.
N0 = No regional lymph node metastasis.
M0 = No distant metastasis.
IBT2, N0, M0T2 = Tumor limited to the pancreas, >2 cm in greatest dimension.
N0 = No regional lymph node metastasis.
M0 = No distant metastasis.