Table 2. Pathologic Axillary Status in 527 Patients With and Without a Breast pCR After NCT.
| Breast Cancer Subtype | No. of Nodes With Positive Histologic Finding, No. (%) of Patients | ||||
|---|---|---|---|---|---|
| 0 | 1 | 2 | ≥3 | All | |
| Breast pCR | |||||
| HER2+ | |||||
| T1N0 | 6 (100) | 0 | 0 | 0 | 6 (100) |
| T2N0 | 46 (100) | 0 | 0 | 0 | 46 (100) |
| T1N1 | 10 (76.9) | 2 (15.4) | 1 (7.7) | 0 | 13 (100) |
| T2N1 | 27 (93.1) | 1 (3.4) | 0 | 1 (3.4) | 29 (100) |
| TN | |||||
| T1N0 | 12 (100) | 0 | 0 | 0 | 12 (100) |
| T2N0 | 52 (100) | 0 | 0 | 0 | 52 (100) |
| T1N1 | 6 (100) | 0 | 0 | 0 | 6 (100) |
| T2N1 | 26 (89.7) | 2 (6.9) | 0 | 1 (3.4) | 29 (100) |
| HER2+ and TN | |||||
| T1N0 | 18 (100) | 0 | 0 | 0 | 18 (100) |
| T2N0 | 98 (100) | 0 | 0 | 0 | 98 (100) |
| T1N1 | 16 (84.2) | 2 (10.5) | 1 (5.3) | 0 | 19 (100) |
| T2N1 | 53 (91.4) | 3 (5.2) | 0 | 2 (3.4) | 58 (100) |
| No Breast pCR | |||||
| HER2+ | |||||
| T1N0 | 8 (100) | 0 | 0 | 0 | 8 (100) |
| T2N0 | 71 (98.6) | 1 (1.4) | 0 | 0 | 72 (100) |
| T1N1 | 10 (71.4) | 1 (7.1) | 1 (7.1) | 2 (14.3) | 14 (100) |
| T2N1 | 36 (48.0) | 7 (9.3) | 16 (21.3) | 16 (21.3) | 75 (100) |
| TN | |||||
| T1N0 | 6 (85.7) | 1 (14.3) | 0 | 0 | 7 (100) |
| T2N0 | 79 (90.8) | 8 (9.2) | 0 | 0 | 87 (100) |
| T1N1 | 3 (33.3) | 0 | 3 (33.3) | 3 (33.3) | 9 (100) |
| T2N1 | 19 (30.6) | 4 (6.5) | 16 (25.8) | 23 (37.1) | 62 (100) |
| HER2+ and TN | |||||
| T1N0 | 14 (93.3) | 1 (6.7) | 0 | 0 | 15 (100) |
| T2N0 | 150 (94.3) | 9 (5.7) | 0 | 0 | 159 (100) |
| T1N1 | 13 (56.5) | 1 (4.3) | 4 (17.4) | 5 (21.7) | 23 (100) |
| T2N1 | 55 (40.1) | 11 (8.0) | 32 (23.4) | 39 (28.5) | 137 (100) |
Abbreviations: NCT, neoadjuvant chemotherapy; pCR, pathologic complete response; TN, triple-negative; +, positive.