Table 3.
Comparisons of ultrasonographic findings in the underestimated and non-underestimated groups
| Variable | Underestimated (n=21) | Non-underestimated (n=48) | P-value |
|---|---|---|---|
| Size on ultrasonography (cm) | 2.3±1.1 | 1.6±0.8 | 0.151 |
| Ultrasonographic findings | |||
| Shape | 0.210 | ||
| Oval | 4 (19) | 19 (39.6) | |
| Round | 2 (9.5) | 2 (4.2) | |
| Irregular | 15 (71.4) | 27 (56.3) | |
| Orientation | 0.276 | ||
| Parallel | 11 (52.4) | 33 (68.8) | |
| Non-parallel | 10 (47.7) | 15 (31.3) | |
| Margin | 0.103 | ||
| Circumscribed | 0 | 2 (4.2) | |
| Indistinct | 4 (19) | 16 (33.3) | |
| Angular | 0 | 0 | |
| Microlobulated | 13 (61.9) | 29 (60.4) | |
| Spiculated | 4 (19) | 1 (2.1) | |
| Boundary | 0.233 | ||
| Abrupt | 3 (14.3) | 14 (29.2) | |
| Echogenic halo | 18 (85.7) | 34 (70.8) | |
| Echogenicity | 0.365 | ||
| Hyperechoic | 0 | 0 | |
| Isoechoic | 3 (14.3) | 4 (8.3) | |
| Hypoechoic | 16 (76.2) | 41 (85.4) | |
| Mixed echogenicity | 2 (9.5) | 3 (6.3) | |
| Microcalcification within the mass on ultrasonography | 11 (52.4) | 28 (58.3) | 0.793 |
| BI-RADS category | 0.148 | ||
| 4 | 12 (57.1) | 37 (77.1) | |
| 5 | 9 (42.9) | 11 (22.9) | |
| Abnormal lymph node in the axilla on ultrasonography | 5/19 (26.3) | 2/41 (4.9) | 0.016 |
Values are presented as mean±SD or number (%).
BI-RADS, Breast Imaging Reporting and Data System.