Clinical Study
Prognostic Value of Classifying Parapharyngeal Extension in Nasopharyngeal Carcinoma Based on Magnetic Resonance Imaging
Table 1
Characteristics of 1504 patients with nasopharyngeal carcinoma.
| | Characteristic | Number of patients* |
| | WHO pathologic classification | | | Type 1 | 17 (1.1) | | Type 2 | 168 (11.2) | | Type 3 | 1319 (87.7) | | T classification | | | T1 | 278 (18.5) | | T2 | 220 (14.6) | | T3 | 587 (39.0) | | T4 | 419 (27.9) | | N classification | | | N0 | 344 (22.9) | | N1 | 901 (59.9) | | N2 | 207 (13.8) | | N3 | 53 (3.4) | | AJCC 2010 stage | | | I | 101 (6.7) | | II | 311 (20.7) | | III | 638 (42.4) | | IVa-b | 454 (30.2) |
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AJCC: American Joint Committee on Cancer; WHO: World Health Organization.
*Numbers in parentheses are percentages.
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