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Pathologic Features by Tumor Size
| Primary tumor ≥ 1 cm (n=158) | Primary tumor < 1 cm (n=70) | P value | |
|---|---|---|---|
| Follicular variant (%) | 32 (20) | 14 (20) | NS |
| Multifocal (%) | 32 (20) | 20 (29) | NS |
| Tumor capsule invasion (%) | 11 (7) | 5 (7) | NS |
| Vascular invasion (%) | 1 (0.6) | 1 (1.4) | NS |
| Extrathyroid extension (%) | 31 (20) | 6 (9) | 0.05 |
| Positive Margin (%) | 14 (24) | 0 (0) | <0.01 |
| Positive lymph node (%) | 43 (27) | 14 (20) | NS |
| Lymph node recurrence (%) | 11 (6.9) | 1 (1.4) | NS |
