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Table 4 Comparison of MRI- and PET/CT-determined tumor staging

From: Significant value of 18F-FDG-PET/CT in diagnosing small cervical lymph node metastases in patients with nasopharyngeal carcinoma treated with intensity-modulated radiotherapy

Tumor stage MRI-determined staging PET/CT-determined staging
N0 N1 N2 N3 N0 N1 N2 N3
T1 28 (6.0) 39 (8.3) 8 (1.7) 2 (0.4) 33 (7.0) 30 (6.4) 10 (2.1) 4 (0.9)
T2 18 (3.8) 41 (8.7) 13 (2.8) 9 (1.9) 21 (4.5) 28 (6.0) 18 (3.8) 14 (3.0)
T3 28 (6.0) 153 (32.6) 37 (7.9) 21 (4.5) 45 (9.6) 104 (22.1) 59 (12.6) 31 (6.6)
T4 7 (1.5) 46 (9.8) 13 (2.8) 7 (1.5) 7 (1.5) 34 (7.2) 22 (4.7) 10 (2.1)
Stage I 28 (6.0) 33 (7.0)
Stage II 98 (20.9) 79 (16.8)
Stage III 239 (50.8) 236 (50.2)
Stage IV 105 (22.3) 122 (26.0)
  1. All values are presented as number of patients followed by percentage in parentheses
  2. MRI magnetic resonance imaging, PET/CT positron emission tomography/computed tomography