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Table 1 TN categories of two staging systems for colorectal cancer

From: A modified TNM staging system for non-metastatic colorectal cancer based on nomogram analysis of SEER database

Stages 7th TNM staging Nomo-staging
I T1-2 N0 T1-2 N0
II T3-4bN0 T3 N0
   T1-2 N1
   T1N2a
IIIa T1-2 N1 T4aN0
  T1N2a T3 N1
   T2N2a
   T1-2N2b
IIIb T3-4aN1 T4bN0
  T2-3N2a T4aN1
  T1-2N2b T3 N2
IIIc T4bN1 T4bN1
  T4 N2a T4 N2
  T3-4N2b