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Table 2 Distribution of T 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
T1 T2 T3 T4 Total
7th edition T1 324 (24.6%) 8 (0.6%)    332 (25.2%)
T2   166 (12.6%)    166 (12.6%)
T3    420 (31.8%)   420 (31.8%)
T4   19 (1.4%) 116 (8.8%) 264 (20.0%) 399 (30.3%)
Total 324 (24.6%) 193 (14.6%) 536 (40.7%) 264 (20.0%) 1317