Table 1 Characteristics of the breast tumor among the two groups with and without pre-op axillary US
Characteristics | Non-US group | US group | Total | P.value |
|---|---|---|---|---|
Age | 44.5 ± 10.85 | 44.8 ± 9.81 | 44.6 ± 10.3 | 0.76 |
Histologic subtype | Â | Â | Â | 0.076 |
 IDC | 172 (64.7%) | 67 (65.1%) | 238 (64.5%) | |
 ILC | 15 (5.6%) | 3 (2.9%) | 18 (4.9%) | |
 Medullary | 5 (1.9%) | 2 (1.9%) | 7 (1.9%) | |
 Metaplastic | 2 (0.8%) | 5 (4.9%) | 7 (1.9%) | |
 Mucinous | 3 (1.1%) | 0 | 3 (0.8%) | |
 Papillary | 2 (0.8%) | 3 (2.9%) | 5 (1.4%) | |
 DCIS with microinvasion | 7 (2.6%) | 2 (1.9%) | 9 (2.4%) | |
 Adenoid Cystic | 1 (0.4%) | 2 (1.9%) | 3 (0.8%) | |
 No residue (after vacuum biopsy) | 7 (2.6%) | 2 (1.9%) | 9 (2.4%) | |
 Missing | 52 (19.5%) | 17 (16.5%) | 69 (18.7%) | |
Pathologic size of the tumor (mm) | 21.44 ± 11.39 | 21.49 ± 11.05 | 21.38 ± 11.23 | 0.81 |
Grade | ||||
 I | 39 (14.7%) | 14 (13.6%) | 53 (14.4%) | 0.96 |
 II | 96 (36.1%) | 37 (35.9%) | 133 (36%) | |
 III | 45 (16.9%) | 16 (15.5%) | 61 (16.5%) | |
 Missing | 86 (32.3%) | 36 (35%) | 122 (33.1%) | |