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Table 3 Distribution of N categories as defined by the 7th and 8th editions

From: Comparison of the seventh and eighth editions of the UICC/AJCC staging system for nasopharyngeal carcinoma: analysis of 1317 patients treated with intensity-modulated radiotherapy at two centers

  8th edition
N0 N1 N2 N3 Total
7th edition N0 250 (19.0%)     250 (19.0%)
N1   719 (54.6%)   12 (0.9%) 731 (55.4%)
N2    252 (19.1%) 26 (2.0%) 278 (21.1%)
N3a     16 (1.2%) 16 (1.2%)
N3B     42 (3.2%) 42 (3.2%)
Total 250 (19.0%) 719 (54.6%) 252 (19.1%) 96 (7.3%) 1317