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Table 2 The patient distribution of both two stages system

From: Comparing the 7th and 8th editions of UICC/AJCC staging system for nasopharyngeal carcinoma in the IMRT era

7th edition 8th edition
T category Number N category Number Clinical stage Number T category Number N category Number Clinical stage Number
T1 82 N0 50 I 18 T1 80 N0 50 I 18
T2 62 N1 82 II 50 T2 64 N1 82 II 50
T3 67 N2 141 III 126 T3 128 N2 123 III 166
T4 89 N3a 8 IVA 79 T4 28 N3 45 IVA 66
   N3b 19 IVB 27