Table I.
Position and ultrasound characteristics of benign and malignant breast masses removed by ultrasound-guided Mammotome-assisted minimally invasive resection.
| Lesion characteristics | Benign, n | Malignant, n | P-value |
|---|---|---|---|
| Position | 0.182 | ||
| Upper outer quadrant | 667 | 12 | |
| Upper inner quadrant | 307 | 9 | |
| Lower outer quadrant | 175 | 8 | |
| Lower inner quadrant | 158 | 5 | |
| Shape | <0.001 | ||
| Oval | 987 | 10 | |
| Round | 124 | 9 | |
| Irregular | 196 | 15 | |
| Orientation | <0.001 | ||
| Parallel | 1,197 | 20 | |
| Not parallel | 110 | 14 | |
| Margin | <0.001 | ||
| Circumscribed | 1,201 | 11 | |
| Not circumscribed | 106 | 23 | |
| Echo pattern | 1.000 | ||
| Hypoechoic | 1,286 | 34 | |
| Isoechoic | 9 | 0 | |
| Complex cystic and solid | 12 | 0 | |
| Posterior features | <0.001 | ||
| No posterior features | 901 | 19 | |
| Enhancement | 369 | 0 | |
| Shadowing | 29 | 15 | |
| Combined pattern | 8 | 0 | |
| Calcifications | <0.001 | ||
| Microcalcifications | 0 | 13 | |
| No microcalcifications | 1,307 | 21 | |
| Architectural distortion | <0.001 | ||
| Yes | 0 | 9 | |
| No | 1,307 | 25 | |
| Duct changes | 0.207 | ||
| Yes | 8 | 1 | |
| No | 1,299 | 33 | |
| Vascularity | 0.162 | ||
| Absent | 536 | 11 | |
| Internal vascularity | 277 | 12 | |
| Vessels in the rim | 494 | 11 |