Table 2.
Sonographic findings in 32 cases of invasive lobular carcinoma
| Feature | Number of cases/masses | Notes |
|---|---|---|
| Masses | 24 | Total number of masses = 35 |
| Single | 16 | |
| Multifocal/multicentric | 8 | One case was reported normal on ultrasound |
| Bilateral | 0 | |
| Focal shadowing without mass | 1 | |
| Architectural distortion | 6 | |
| Size | ||
| <1 cm | 7 | |
| 1–3 cm | 25 | |
| >3 cm | 3 | |
| Mass | ||
| Hypoechoic | 27 | |
| Mixed heterogeneous | 8 | |
| Margins | ||
| Irregular, infiltrating | 28 | |
| Rounded, smooth | 7 | |
| Calcifications | ||
| Microcalcifications | 5 | |
| Posterior acoustic features | ||
| Shadowing | 23 | |
| No shadowing | 11 | |
| Acoustic enhancement | 1 | |
| Longitudinal axis | ||
| Perpendicular to skin | 26 | |
| Parallel to skin | 9 | |
| Associated fibroadenosis | 10 | |
| Associated duct dilatation | 3 | |
| Skin thickening | 5 | |