Table 2.
Type of surgery after neoadjuvant chemotherapy (NAC)
| ILC (n = 466) | IDC (n = 3622) | P value | |||
|---|---|---|---|---|---|
| Mastectomy | BCS | Mastectomy | BCS | ||
| Initial surgery | |||||
| Clinical tumor size | |||||
| T1 | 18 (51.4 %) | 17 (48.6 %) | 208 (51.4 %) | 197 (48.6 %) | 0.9936 |
| T2 | 119 (61.7 %) | 74 (38.3 %) | 840 (44.3 %) | 1056 (55.7 %) | <0.0001 |
| T3 | 163 (89.1 %) | 20 (10.9 %) | 590 (81.0 %) | 138 (19.0 %) | 0.0104 |
| T4 | 52 (96.3 %) | 2 (3.7 %) | 551 (94.0 %) | 35 (6.0 %) | 0.4942 |
| Unknown | 1 | 0 | 7 | 0 | |
| Total | 353 (75.8 %) | 113 (24.4 %) | 2196 (60.6 %) | 1426 (39.4 %) | <0.0001 |
| Surgical reinterventions | <0.0001 | ||||
| BCS | 8 (1.7 %) | 56 (1.5 %) | |||
| Mastectomy | 30 (6.4 %) | 67 (1.8 %) | |||
| Definitive surgery | <0.0001 | ||||
| BCS | 83 (17.8 %) | 1359 (37.5 %) | |||
| Mastectomy | 383 (82.2 %) | 2263 (62.5 %) | |||
ILC invasive lobular carcinoma, IDC invasive ductal carcinoma, BCS breast-conserving surgery