Clinicopathological characteristics for patients (n=152) and nodules (n=161)
| Variables | Values |
|---|---|
| Age | 53.6±14.3 |
| Male/female | 37/115 (24.3%/75.7%) |
| Sonographic findings | |
| Tumor size (mm) | 14.9±10.3 |
| Location | |
| Upper | 59 (36.6%) |
| Middle | 54 (33.5%) |
| Lower | 48 (29.8%) |
| Echogenicity | |
| Isoechogenicity | 15 (9.3%) |
| Mild hypoechogenicity | 57 (35.4%) |
| Marked hypoechogenicity | 89 (55.3%) |
| Margin | |
| Smooth | 33 (20.5%) |
| Ill-defined | 47 (29.2%) |
| Irregular | 81 (50.3%) |
| Orientation | |
| Parallel | 73 (45.6%) |
| Nonparallel | 87 (54.4%) |
| Parenchymal echogenic foci | 82 (51.2%) |
| Extrathyroidal extension | |
| Absent | 48 (30.0%) |
| Abutment | 66 (41.2%) |
| Capsular disruption | 29 (18.1%) |
| Protrusion | 17 (10.6%) |
| K-TIRADS | |
| Category 3 | 8 (5.0%) |
| Category 4 | 38 (23.6%) |
| Category 5 | 115 (71.4%) |
| Pathologic findings | |
| Tumor size (mm) | 13.6±10.3 |
| Multiplicity | 59 (36.6%) |
| Extrathyroidal extension | |
| Absent | 77 (47.8%) |
| Microscopic | 80 (49.7%) |
| Gross | 4 (2.5%) |
| Lymphovascular invasion | 17 (10.6%) |
| Resection margin involvement | 21 (13.0%) |
| Lymph node involvement | 37 (23.0%) |
K-TIRADS: Korean Thyroid Imaging Reporting and Data System