Table 2.
Comparison of pathologic findings between patients treated with robotic thyroidectomy and endoscopic thyroidectomy.
| Robot group (n = 1769) | Endoscopy group (n = 843) | P value | |
|---|---|---|---|
| Pathology | NS | ||
| Papillary carcinoma | 1758 (99.3%) | 837 (99.3%) | |
| Follicular carcinoma | 5 (0.3%) | 6 (0.7%) | |
| Medullary carcinoma | 5 (0.3%) | ||
| Hurthle cell carcinoma | 1 (0.1%) | ||
| Tumor size, mean (cm) | 0.5 ± 0.5 | 0.4 ± 0.5 | NS |
| Multifocality | NS | ||
| Yes | 469 (26.5) | 110 (13.0%) | |
| No | 1300 (73.5) | 733 (87.0%) | |
| Bilaterality | NS | ||
| Yes | 208 (11.8%) | 72 (8.5%) | |
| No | 1561 (88.2%) | 771 (91.5%) | |
| Mean retrieved central LN (n) | 4.5 ± 2.6 | 2.9 ± 1.7 | <0.001 |
| Mean metastatic central LN (n) | 1.2 ± 0.9 | 1.0 ± 0.7 | NS |
| TNM stage | |||
| T1 | 905 (51.2%) | 513 (60.9%) | 0.011 |
| T2 | 16 (0.9%) | 15 (1.8%) | |
| T3 | 841 (47.5%) | 314 (37.2%) | |
| T4a | 7 (0.4%) | 1 (0.1%) | |
| N0 | 1131 (64.0%) | 605 (71.7%) | 0.001 |
| N1a | 570 (32.2%) | 224 (26.6%) | |
| N1b | 68 (3.8%) | 14 (1.7%) | |
| Stage | 0.002 | ||
| Stage I | 1480 (83.7%) | 750 (89.0%) | |
| Stage II | 275 (15.5%) | 92 (10.9%) | |
| Stage IVa | 14 (0.8%) | 1 (0.1%) |
LN: lymph node.
TNM: tumor-node-metastasis.