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Demographic and the clinicopathologic characteristics of 321 patients with papillary thyroid cancer
| Variables | Mean (n=321, range) |
|---|---|
| Age (years) | 45.3±10.5 (15-78) |
| Gender (M:F, %) | 54:267 (16.8%:83.2%) |
| Tumor size (cm) | 0.84±0.59 (0.1-5.0) |
| 127 (39.6%) | |
| Bilateral cancer | 85 (26.5%) |
| Extrathyroidal extension | 180 (56.1%) |
| N0:N1a:N1b | 154 (48.0%):142 (44.0%):25 (8.0%) |
| Retrieved LN (n) | 11.0±13.6 (0-113) |
| Central | 8.0±5.7 (0-31) |
| Lateral | 40.8±20.0 (16-103) |
| Metastatic LN (n) | 1.9±3.3 (0-23) |
| Central | 1.6±2.5 (0-17) |
| Lateral | 4.4±4.4 (1-18) |
| High number of metastatic LN (≥2) | 103 (32.1%) |
| Metastatic LN size (cm) | |
| Central | 0.37±0.34 (0.1-2.1) |
| Lateral | 0.89±0.55 (0.3-2.7) |
| Micrometastasis (<0.2 cm) at level VI | 76/163 (46.6%) |
| Extranodal extension at level VI | 10 (3.1%) |
| LN ratio (metastatic LN/retrieved LN) | 0.19±0.27 (0-1.0) |
| High LN ratio (>0.4) | 60 (18.7%) |
| Low risk disease (N0, ≤5 micrometastasis) | 230 (71.7%) |
†Multiple cancer: multiple tumor in unilateral lobe except bilateral tumor