Table 1 Clinicopathological features of 51 lymph node-negative primary invasive breast cancers
Clinicopathological features | No. of cases (%) | P | ||
|---|---|---|---|---|
Total | Relapsed group | Non-relapsed group | ||
Average age(±SD) | 54.5 (±11.3) | 55.8 (±10.0) | 53.8 (±11.9) |  |
Stage | ||||
 I | 9 | 2 (11) | 7 (22) | NS |
 II | 35 | 14 (73) | 21 (65) |  |
 III | 7 | 3 (16) | 4 (13) |  |
Histological type | ||||
 Invasive ductal carcinoma | 47 | 16 (84) | 31 (97) | NS |
 Invasive lobular carcinoma | 3 | 3 (16) | 0 (0) |  |
 Squamous cell carcinoma | 1 | 0 (0) | 1 (3) |  |
Grade | ||||
 1 | 5 | 1 (5) | 4 (13) | NS |
 2 | 14 | 4 (21) | 10 (31) |  |
 3 | 32 | 14 (74) | 18 (56) |  |
Immunohistochemical subtype | ||||
 Luminal A-like | 15 | 4 (21) | 11 (34) | NS |
 Luminal B-like | 18 | 10 (53) | 8 (25) |  |
 HER2 overexpressing | 6 | 0 (0) | 6 (19) |  |
 Triple negative | 11 | 5 (26) | 6 (19) |  |
 Not identified | 1 | 0 (0) | 1 (3) |  |
All | 51 | 19 (100) | 32 (100) | Â |