Table 2.
Comparison of the preoperative ultrasonographic features of AUS/FLUS nodules with malignant and benign final histopathology
| Benign (n = 299) | Malignant (n = 124) | p | |
|---|---|---|---|
| Irregular margin | 4 (1.5%) | 16 (12.9%) | <0.001 |
| Microcalcification | 15 (5.1%) | 19 (15.5%) | 0.001 |
| Hypoechogenity | 75 (25.3%) | 60 (49.1%) | <0.001 |
| Absence of a halo | 212 (71%) | 99 (81%) | 0.038 |
| Macrocalcification | 44 (14.7%) | 24 (19.8%) | 0.21 |
| Anteroposterior diameter, cm (median) | 11.9 (3.9–46.4) | 10.1 (3.7–34.9) | 0.17 |
| Transverse diameter, cm (median) | 14.8 (4.4–142.2) | 13.1 (3.9–53.4) | 0.02 |
| Longitudinal diameter, cm (median) | 16.7 (5–150) | 14.7 (4.8–63.3) | 0.027 |
| AP/T ratio (median) | 0.7 (0.3–1.28) | 0.78 (0.41–1.27) | 0.006 |
AP, anteroposterior; T, transverse.