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Table 4 Distribution of overall stage 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
I II III IVA Total
7th edition I 93 (7.1%) 2 (0.2%)    95 (7.3%)
II   283 (21.5%)   9 (0.7%) 292 (22.2%)
III    473 (35.9%) 17 (1.3%) 490 (37.2%)
IVA   10 (0.8%) 113 (8.6%) 259 (19.7%) 382 (29.0%)
IVB     58 (4.4%) 58 (4.4%)
Total 93 (7.1%) 295 (22.4%) 586 (44.5%) 343 (26.0%) 1317