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
324 (24.6%)
8 (0.6%)
332 (25.2%)
166 (12.6%)
420 (31.8%)
19 (1.4%)
116 (8.8%)
264 (20.0%)
399 (30.3%)
193 (14.6%)
536 (40.7%)
1317