Table 2. Mammographic findings of patients with ypT0 and ypTis.
| Parameters | ypT0 (%) | ypTis (%) | P-value |
|---|---|---|---|
| Before NCT | |||
| Mean Size ± SD | 29.4 ± 21.8 | 33.7 ± 21.0 | 0.287a |
| Extent | |||
| Single | 46 (63.0) | 27 (37.0) | 0.105 |
| Multiple | 21 (47.7) | 23 (52.3) | |
| Parenchymal pattern | |||
| b | 19 (65.5) | 10 (34.5) | 0.078b |
| c | 41 (51.2) | 39 (48.8) | |
| d | 7 (87.5) | 1 (12.5) | |
| Presentation of main lesion | |||
| Mass alone | 48 (70.6) | 20 (29.4) | <0.001 |
| Microcalcifications ± mass | 11 (28.9) | 27 (71.1) | |
| Undetected | 8 (72.7) | 3 (27.3) | |
| Associated microcalcifications | |||
| Present | 15 (31.2) | 33 (68.8) | <0.001 |
| Absent | 52 (75.4) | 17 (24.6) | |
| Shape | |||
| Round or oval | 38 (63.3) | 22 (36.7) | 0.252 |
| Irregular | 15 (57.7) | 11 (42.3) | |
| Undetected | 14 (45.2) | 17 (54.8) | |
| Margin | |||
| Circumscribed | 4 (100.0) | 0 (0.0) | 0.302b |
| Microlobulated | 7 (58.3) | 5 (41.7) | |
| Spiculated | 12 (57.1) | 9 (42.9) | |
| Indistinct | 29 (63.0) | 17 (37.0) | |
| Obscured | 1 (33.3) | 2 (66.7) | |
| Undetected | 14 (45.2) | 17 (54.8) | |
| Density | |||
| High density | 23 (65.7) | 12 (34.3) | 0.295 |
| Equal density | 29 (58.0) | 21 (42.0) | |
| Low density or undetected | 15 (46.9) | 17 (53.1) | |
| After NCT | |||
| Complete response or undetected | 26 (81.2) | 6 (18.8) | 0.003b |
| Residual microcalcifications alone | 3 (50.0) | 3 (50.0) | |
| Residual mass ± microcalcifications | 38 (48.1) | 41 (51.9) |
aIndependent samples t-test.
bFisher’s exact test.