Table II.
Univariate analysis of sonographic features in DCIS and DCISM.
| Sonographic features | DCIS, n=83 (%) | DCISM, n=53 (%) | P-value |
|---|---|---|---|
| Mass | 47 (56.6) | 25 (47.2) | 0.281 |
| Shape | 0.158 | ||
| Oval | 9 (19.1) | 1 (4.0) | |
| Irregular | 38 (80.9) | 24 (96.0) | |
| Orientation | 0.364 | ||
| Parallel | 38 (80.9) | 23 (92.0) | |
| Not parallel | 9 (19.1) | 2 (8.0) | |
| Margin | 0.015 | ||
| Circumscribed | 12 (25.5) | 0 (0.0) | |
| Not circumscribed | 35 (74.5) | 25 (100.0) | |
| Echo pattern | 0.502 | ||
| Hypoechoic | 44 (93.6) | 25 (100.0) | |
| Complex cystic and solid | 3 (6.4) | 0 (0.0) | |
| Posterior features | 0.999 | ||
| No posterior features or enhancement | 42 (89.4) | 23 (92.0) | |
| Shadowing or combined pattern | 5 (10.6) | 2 (8.0) | |
| Non-mass abnormality | 36 (43.4) | 28 (52.8) | 0.381 |
| Layered duct-like structures without a distinct mass with a zebra pattern or with small nodules less than 3 mm in diameter | 28 (77.8) | 25 (89.3) | |
| Ductal dilation | 8 (22.2) | 3 (10.7) | |
| Vascularity | 0.002 | ||
| Absent | 37 (44.6) | 10 (18.9) | |
| Present | 46 (55.4) | 43 (81.1) | |
| Calcification | 0.003 | ||
| Absent | 56 (67.5) | 22 (41.5) | |
| Present | 27 (32.5) | 31 (58.5) |
DCIS, ductal carcinoma in situ; DCISM, ductal carcinoma in situ with microinvasion.