Table 2.
Mammography and ultrasound features of the surgery and neoadjuvant chemotherapy (NAC) group
| Variable | All patients | Non-NAC group a) | NAC groupb) | P-value |
|---|---|---|---|---|
| Mammography feature | ||||
| Visibility on mammography c) | >0.99 | |||
| Not visible | 5 (9.4) | 2 (9.5) | 3 (9.4) | |
| Visible | 48 (90.6) | 19 (90.5) | 29 (90.6) | |
| Calcification c) | 0.39 | |||
| Present | 34 (64.2) | 12 (57.1) | 22 (68.8) | |
| Absent | 19 (35.8) | 9 (42.9) | 10 (31.2) | |
| Ultrasound feature | ||||
| Mean lesion diameter (mm) | 28.3±18.4 (6-100) | 25.5±17.3 (6-70) | 30.2±19.1 (9-100) | 0.36 |
| Shape | 0.49 | |||
| Oval | 28 (50.9) | 13 (59.1) | 15 (45.5) | |
| Round | 2 (3.6) | 0 (0) | 2 (6.1) | |
| Irregular | 25 (45.5) | 9 (40.9) | 16 (48.4) | |
| Margin | 0.21 | |||
| Circumscribed | 1 (1.8) | 0 (0) | 1 (3.0) | |
| Ill-defined | 21 (38.2) | 6 (27.3) | 15 (45.5) | |
| Spiculated | 33 (60.0) | 16 (72.7) | 17 (51.5) | |
| Orientation | 0.90 | |||
| Parallel | 42 (76.4) | 17 (77.3) | 25 (75.8) | |
| Nonparallel | 13 (23.6) | 5 (22.7) | 8 (24.2) | |
| Boundary | 0.63 | |||
| Abrupt interface | 17 (30.9) | 6 (27.3) | 11 (33.3) | |
| Echogenic halo | 38 (69.1) | 16 (72.7) | 22 (66.7) | |
| Posterior feature | 0.20 | |||
| None | 39 (70.9) | 18 (81.8) | 21 (63.6) | |
| Enhancement | 12 (21.8) | 4 (18.2) | 8 (24.2) | |
| Shadowing | 4 (7.3) | 0 (0) | 4 (12.1) | |
| Ductal dilatation | 0.64 | |||
| Present | 4 (7.3) | 1 (4.5) | 3 (9.1) | |
| Absent | 51 (92.7) | 21 (95.5) | 30 (90.9) | |
| Ultrasound category | 0.67 | |||
| 4b | 1(1.8) | 1 (4.6) | 0 (0) | |
| 4c | 8 (14.6) | 3 (13.6) | 5 (15.2) | |
| 5 | 46 (83.6) | 18 (81.8) | 28 (84.8) |
Values are presented as number (%).
a)
Non-NAC group was the group of patients who went through surgery without prior NAC.
b)
NAC group was the group of patients who went through NAC prior to surgery.
c)
Available for only 53 lesions.